Data Visualization

Skill
Computer Science

Top 100 Data Visualization Interview Questions and Answers 2024

129 questions found

Updated 30 Nov 2024

Q1. What is meant by discrete and continous in tableau

Ans.

In Tableau, discrete and continuous are two types of data that can be used to categorize and analyze information.

  • Discrete data consists of distinct, separate values that cannot be measured or divided further.

  • Examples of discrete data in Tableau include categories like product names, customer segments, or regions.

  • Continuous data represents measurements or values that can be divided infinitely and can take on any value within a range.

  • Examples of continuous data in Tableau inclu...read more

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Q2. What is Book marks in PBI?

Ans.

Bookmarks in Power BI are a feature that allows users to save and organize specific views of a report or dashboard.

  • Bookmarks help users to easily navigate and switch between different report views.

  • They can be used to save filters, slicer selections, visualizations, and other report settings.

  • Bookmarks can be created manually or through Power BI's recording feature.

  • They can be accessed and managed through the Bookmarks pane in Power BI Desktop or the Bookmarks menu in Power BI ...read more

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Q3. Tell about Tableau dash boards.

Ans.

Tableau dashboards are interactive visualizations that help users analyze and understand data.

  • Dashboards are made up of multiple worksheets and can include filters, parameters, and actions.

  • They allow users to explore data and answer questions in real-time.

  • Dashboards can be shared with others and embedded in websites or other applications.

  • Examples of dashboards include sales performance dashboards, marketing campaign dashboards, and financial analysis dashboards.

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Q4. How and where Gauge charts are used?

Ans.

Gauge charts are used to visually represent a single value within a given range.

  • Gauge charts are commonly used in business dashboards to display key performance indicators (KPIs).

  • They provide a quick and intuitive way to assess the current status or progress towards a goal.

  • Gauge charts can be used to show metrics such as sales targets, customer satisfaction scores, or production efficiency.

  • They are effective in highlighting deviations from the desired value or target.

  • Gauge ch...read more

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Q5. How to approach if you're stuck in a Tableau problem. How to optimize your dashboards

Ans.

To approach a Tableau problem, identify the issue and use available resources. To optimize dashboards, simplify design and use efficient data sources.

  • Identify the issue and use available resources such as Tableau community forums or Tableau support

  • Simplify design by removing unnecessary elements and using consistent formatting

  • Use efficient data sources by minimizing the amount of data being loaded and using data extracts instead of live connections

  • Consider using Tableau's per...read more

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Q6. what are the data visulaztion tools?

Ans.

Data visualization tools are software that help in creating visual representations of data to aid in understanding and analysis.

  • Tableau

  • Power BI

  • QlikView

  • Google Data Studio

  • D3.js

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Q7. Tell me about Architecture of Tableau?

Ans.

Tableau follows a client-server architecture with a three-tier structure.

  • Tableau Desktop is the client application used for creating and publishing content.

  • Tableau Server is the central server that manages user authentication, data sources, and content distribution.

  • Tableau Online is a cloud-based version of Tableau Server.

  • Tableau's three-tier structure includes the data source, the VizQL server, and the application server.

  • Tableau's architecture allows for scalability and flex...read more

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Q8. How Tableau get data from SAS environment?

Ans.

Tableau can connect to SAS environment through ODBC or SAS/ACCESS Interface.

  • Tableau can use ODBC to connect to SAS environment and access data.

  • SAS/ACCESS Interface can also be used to connect Tableau to SAS environment.

  • Tableau can directly connect to SAS datasets and tables.

  • Tableau can also use SAS data connectors to access data from SAS environment.

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Q9. PowerBI - Create Bookmarks in Power BI

Ans.

Bookmarks in Power BI allow users to save the current state of a report for easy navigation.

  • Bookmarks can be created by selecting 'View' and then 'Bookmarks' in the Power BI toolbar.

  • Users can add bookmarks for specific filters, slicers, and visuals to save the current view of the report.

  • Bookmarks can be renamed, rearranged, and deleted as needed.

  • Bookmarks can also be used to create interactive presentations or storytelling within a report.

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Q10. Diff types of charts and graphs used by pm and leads

Ans.

Various types of charts and graphs are used by project managers and team leads to visualize data.

  • Gantt charts for project timelines

  • Pie charts for showing percentages or proportions

  • Bar graphs for comparing data

  • Line graphs for showing trends over time

  • Scatter plots for showing correlations

  • Heat maps for visualizing data density

  • Flow charts for showing process flows

  • Tree maps for showing hierarchical data

  • Bubble charts for showing three dimensions of data

  • Waterfall charts for showing ...read more

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Q11. How to apply row level security in spotfire?

Ans.

Row level security can be applied in Spotfire using data limiting expressions.

  • Create a data limiting expression that defines the criteria for the rows that should be visible to a specific user or group.

  • Assign the data limiting expression to the data table or view.

  • Create a user or group filter that references the data limiting expression.

  • Assign the user or group filter to the visualization.

  • Test the row level security by logging in as the user or group and verifying that only t...read more

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Q12. What is blending in Tableau ?

Ans.

Blending in Tableau is combining data from multiple sources to create a single view.

  • Blending allows for analysis of data from different sources without the need for merging.

  • Data sources can be blended based on common fields or dimensions.

  • Blending can be used to create a single view with data from multiple sources.

  • Example: Blending sales data from Excel with customer data from a database to analyze customer behavior.

  • Example: Blending survey data from SurveyMonkey with sales da...read more

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Q13. How do you create a dashboard

Ans.

A dashboard can be created using data visualization tools like Tableau or Power BI.

  • Choose a data visualization tool like Tableau or Power BI

  • Connect the tool to your data source

  • Select the type of visualization you want to use (e.g. bar chart, pie chart, line graph)

  • Drag and drop the data fields onto the dashboard canvas

  • Customize the dashboard layout and design to make it visually appealing

  • Add filters and interactivity for user engagement

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Q14. Have you worked on Tableau Server?

Ans.

Yes, I have worked on Tableau Server.

  • I have experience in installing and configuring Tableau Server.

  • I have created and managed user accounts and permissions.

  • I have published workbooks and data sources to Tableau Server.

  • I have monitored server performance and troubleshooted issues.

  • I have worked with Tableau Server APIs to automate tasks.

  • I have provided training and support to end-users.

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Q15. 2.How to schedule auto refresh of dashboard

Ans.

Auto refresh can be scheduled using Tableau Server or Tableau Online

  • In Tableau Server, go to the dashboard and click on 'Schedule Refresh'

  • Set the frequency and time for the refresh

  • In Tableau Online, go to the dashboard and click on 'Schedule Refresh'

  • Set the frequency and time for the refresh

  • Make sure the data source is set to refresh before the dashboard refreshes

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Q16. How to make live Dashboards with Power BI

Ans.

Live dashboards can be created in Power BI by connecting to real-time data sources and using features like streaming datasets and push datasets.

  • Connect to real-time data sources such as Azure Stream Analytics, Azure Event Hubs, or Power Automate

  • Create streaming datasets to continuously update data in real-time

  • Use push datasets to push data from external sources to Power BI

  • Design visualizations and add them to a dashboard

  • Set up automatic data refresh intervals for real-time up...read more

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Q17. What is box plot? Why is it used? How do we assess the skewness of distribution from the box plot?

Ans.

Box plot is a visual representation of the distribution of a dataset, used to identify outliers and assess skewness.

  • Box plot displays the median, quartiles, and potential outliers of a dataset.

  • It is used to visually assess the spread, skewness, and presence of outliers in the data.

  • Skewness can be assessed from the box plot by observing the relative lengths of the whiskers and the position of the median.

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Q18. Pull dataset from SQL to Power BI and perform the visualization

Ans.

Use Power BI to connect to SQL database, import dataset, and create visualizations

  • Connect Power BI to SQL database

  • Import dataset from SQL into Power BI

  • Create visualizations using the imported data

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Q19. How you look into data ?

Ans.

I analyze data by identifying patterns, trends, and outliers to derive insights and make informed decisions.

  • I start by understanding the context and purpose of the data analysis.

  • I clean and preprocess the data to ensure accuracy and consistency.

  • I use statistical methods and data visualization techniques to explore and interpret the data.

  • I apply machine learning algorithms for predictive modeling and pattern recognition.

  • I communicate findings and recommendations based on the d...read more

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Q20. What was visualization

Ans.

Visualization is the representation of data in a visual format, such as charts, graphs, and maps.

  • Visualization helps in understanding complex data by presenting it in a more digestible format

  • It can reveal patterns, trends, and outliers that may not be apparent in raw data

  • Examples include bar charts, pie charts, scatter plots, and heat maps

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Q21. How to draw pivot? With short cut key.

Ans.

To draw a pivot in Excel, use the shortcut key Alt + D + P.

  • Press Alt + D to open the Data tab in Excel.

  • Then press P to open the PivotTable dialog box.

  • Select the range of data you want to use for the pivot table and choose where you want the pivot table to be placed.

  • Click OK to create the pivot table.

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Q22. What is different between report and dashboard??

Ans.

Reports are detailed and provide specific information, while dashboards are high-level and provide an overview.

  • Reports are typically longer and more detailed than dashboards

  • Reports are often used to provide specific information to a targeted audience

  • Dashboards are high-level and provide an overview of key metrics

  • Dashboards are often used to monitor performance and identify trends

  • Reports are usually static, while dashboards are interactive and allow for real-time data explorat...read more

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Q23. What is the use of parameters in Tableau?

Ans.

Parameters in Tableau allow users to dynamically change the values of calculations, filters, and reference lines.

  • Parameters can be used to create dynamic filters that allow users to change the data displayed in a visualization.

  • Parameters can also be used in calculations to perform complex calculations based on user input.

  • Parameters can be used in reference lines to dynamically set thresholds or benchmarks for comparison.

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Q24. Explain Pareto chart with diagram

Ans.

Pareto chart is a bar graph that displays the frequency of defects or issues in descending order to prioritize improvement efforts.

  • Pareto chart helps in identifying the most significant factors contributing to a problem.

  • It follows the 80/20 rule, where 80% of the problems are often caused by 20% of the factors.

  • The bars are arranged in descending order of frequency, with a cumulative percentage line to show the total contribution.

  • It helps in focusing on the vital few issues th...read more

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Q25. 2.what is histro diagram

Ans.

A histogram is a graphical representation of data distribution.

  • It is a bar graph-like representation of data that groups a range of values into intervals.

  • It shows the frequency of occurrence of data in each interval.

  • It helps to identify the central tendency, spread, and shape of the data distribution.

  • It is commonly used in quality control to analyze process variations.

  • Example: A histogram of test scores in a class can show the number of students who scored within each grade r...read more

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Q26. How do you create dashboard, actions,

Ans.

To create dashboards and actions in Tableau, you can use the drag-and-drop interface to add visualizations and set up interactivity.

  • Use the drag-and-drop interface to add visualizations to the dashboard

  • Set up actions to create interactivity between different visualizations

  • Define filter actions to allow users to interact with the data dynamically

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Q27. What is LOD in Tableau?

Ans.

LOD stands for Level of Detail. It is a technique used in Tableau to perform complex calculations on aggregated data.

  • LOD expressions allow users to compute values at different levels of detail in a visualization

  • They can be used to create custom aggregations, filters, and calculations

  • There are three types of LOD expressions: FIXED, INCLUDE, and EXCLUDE

  • FIXED LOD expressions define a level of detail that is independent of the visualization

  • INCLUDE LOD expressions add a specified ...read more

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Q28. What are various data visualisation platforms

Ans.

Various data visualisation platforms include Tableau, Power BI, Google Data Studio, and D3.js.

  • Tableau

  • Power BI

  • Google Data Studio

  • D3.js

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Q29. What is extensions in tableau?

Ans.

Extensions in Tableau are custom add-ons that enhance the functionality of Tableau by allowing users to integrate external services and applications.

  • Extensions can be used to connect Tableau with third-party applications, services, and data sources.

  • They can be developed using HTML, CSS, and JavaScript to create custom visualizations, write-back capabilities, and more.

  • Examples of extensions include integrating Tableau with Google Maps for geospatial analysis, embedding Tableau...read more

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Q30. what is scatter plot

Ans.

A scatter plot is a type of data visualization that displays the relationship between two numerical variables through dots on a graph.

  • Scatter plots are used to identify patterns and relationships between variables.

  • Each dot on the plot represents a single data point with the x-axis representing one variable and the y-axis representing the other variable.

  • The pattern of the dots can indicate the strength and direction of the relationship between the variables.

  • Scatter plots are c...read more

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Q31. How to add date table in power bi

Ans.

To add a date table in Power BI, you can create a new table with a list of dates and relationships with other tables.

  • Create a new table in Power BI with a list of dates

  • Add columns for day, month, year, etc. for additional analysis

  • Establish relationships between the date table and other tables in the data model

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Q32. What do you shown on any dashboard or reporting tool

Ans.

I show key performance indicators, trends, and metrics on the dashboard or reporting tool.

  • Key performance indicators (KPIs) such as sales revenue, customer acquisition cost, and customer retention rate

  • Trends in sales, marketing, and operational data over time

  • Metrics related to productivity, efficiency, and profitability

  • Visual representations like charts, graphs, and tables for easy interpretation

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Q33. What all types can you create in Nprinting ?

Ans.

Nprinting allows creation of various types of reports such as pixel perfect, Excel, PowerPoint, Word, and HTML.

  • Pixel perfect reports for precise formatting

  • Excel reports for data analysis

  • PowerPoint reports for presentations

  • Word reports for document creation

  • HTML reports for web publishing

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Q34. Difference between real time graphs and historical graph

Ans.

Real time graphs show current data while historical graphs show past data.

  • Real time graphs display data as it is happening, while historical graphs show data from a specific time period.

  • Real time graphs are useful for monitoring current trends and making immediate decisions, while historical graphs are useful for analyzing past trends and making long-term decisions.

  • Examples of real time graphs include stock market tickers and weather radars, while examples of historical graph...read more

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Q35. How to handle large amount of data on tableau.

Ans.

Utilize Tableau's features like data extracts, data blending, and performance optimization techniques.

  • Use data extracts to improve performance by reducing the amount of data being processed.

  • Utilize data blending to combine data from multiple sources without the need for complex ETL processes.

  • Optimize performance by using filters, aggregations, and calculations efficiently.

  • Consider using Tableau's in-memory data engine for faster processing of large datasets.

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Q36. how fast can you prepare a bar chart with product operations data

Ans.

I can prepare a bar chart with product operations data within a few minutes.

  • I have experience using data visualization tools like Tableau, Power BI, or Excel to quickly create bar charts.

  • I am proficient in organizing and cleaning data to ensure accurate representation in the chart.

  • I can customize the chart with relevant labels, colors, and titles to make it visually appealing and easy to understand.

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Q37. Tell me about tableau architecture

Ans.

Tableau architecture is a visual analytics platform that helps users to understand data through interactive visualizations.

  • Tableau consists of three main components: Data Connection, Data Engine, and VizQL Server.

  • Data Connection allows users to connect to various data sources such as databases, spreadsheets, and cloud services.

  • Data Engine processes and optimizes data queries for faster performance.

  • VizQL Server translates data queries into visualizations that can be displayed ...read more

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Q38. Difference between heat map an tree map

Ans.

Heat map displays data using color intensity while tree map displays data using nested rectangles.

  • Heat map is used to show the distribution of data across a two-dimensional space.

  • Tree map is used to display hierarchical data using nested rectangles.

  • Heat map uses color intensity to represent the data values while tree map uses the size of the rectangles.

  • Heat map is useful for identifying patterns and trends in large datasets while tree map is useful for visualizing hierarchica...read more

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Q39. What is the use of histogram chart

Ans.

Histogram chart is used to visually represent the distribution of data in a dataset.

  • Histograms show the frequency of data values within specified intervals or bins

  • They are useful for identifying patterns, trends, and outliers in data

  • Histograms are commonly used in quality control to monitor process variations

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Q40. Which Visulization tool you used.

Ans.

I have experience using Tableau and Power BI for data visualization.

  • Tableau is a powerful data visualization tool that allows for interactive dashboards and storytelling.

  • Power BI is another popular tool for creating interactive reports and visualizations.

  • I have used both tools to create visually appealing and informative charts, graphs, and dashboards.

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Q41. Explain Tableau Dashboard actions

Ans.

Tableau Dashboard actions allow users to interact with the data and visualizations by clicking on specific elements.

  • Dashboard actions can be used to filter data, highlight specific data points, or navigate to other dashboards.

  • There are four types of actions in Tableau: filter, highlight, URL, and parameter.

  • For example, a user can click on a bar chart to filter the data in a related table or click on a map to highlight the corresponding data points.

  • Dashboard actions can be cus...read more

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Q42. Can you merge multiple dashboards into one

Ans.

Yes, multiple dashboards can be merged into one by using dashboarding tools like Tableau or Power BI.

  • Use dashboarding tools like Tableau or Power BI to merge multiple dashboards into one

  • Identify common data sources and fields across the dashboards

  • Create a new dashboard and bring in the necessary visualizations and data from the existing dashboards

  • Arrange the visualizations and data in a cohesive and meaningful way to create a unified view

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Q43. Can you explain basemap

Ans.

A basemap is a foundational map used as a background for displaying additional layers of geographic information.

  • Basemaps provide context and reference for other data layers

  • They typically include features like roads, boundaries, water bodies, and terrain

  • Examples of basemaps include Google Maps, OpenStreetMap, and Esri World Imagery

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Q44. Explain about dual axis in tableau

Ans.

Dual axis in Tableau allows for combining two different measures on the same axis for better comparison.

  • Dual axis allows for comparing two measures on the same chart

  • Each measure can have its own scale, allowing for better visualization

  • Different chart types can be used for each measure, such as bars and lines

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Q45. Have you created Geo Spatial charts in Tableau?

Ans.

Yes, I have created Geo Spatial charts in Tableau.

  • I have used Tableau's built-in mapping functionality to create Geo Spatial charts.

  • I have also used custom shapefiles to create more detailed maps.

  • I have experience with creating heat maps, point maps, and choropleth maps.

  • I have used Geo coding to plot latitude and longitude coordinates on maps.

  • I have also used Tableau's integration with Mapbox to create custom maps.

  • I have created Geo Spatial charts for various projects, includ...read more

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Q46. What visualizations you use for different forms of data and contexts?

Ans.

I use a variety of visualizations such as bar charts, line graphs, scatter plots, and heat maps depending on the type of data and context.

  • Bar charts are useful for comparing categories of data

  • Line graphs are great for showing trends over time

  • Scatter plots help in identifying relationships between variables

  • Heat maps are effective for visualizing large datasets and identifying patterns

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Q47. 1. What is box plots and why are they used

Ans.

Box plots are a graphical representation of data distribution using quartiles and outliers.

  • Box plots show the median, quartiles, and outliers of a dataset.

  • They are used to identify skewness, outliers, and the spread of data.

  • They are also useful for comparing multiple datasets.

  • Box plots can be created using software like Excel or R.

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Q48. Which visualisation tools you have worked on?

Ans.

I have worked on Tableau, Power BI, and Excel for data visualization.

  • Tableau for creating interactive dashboards and visualizations

  • Power BI for creating reports and visualizations with real-time data

  • Excel for creating basic charts and graphs

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Q49. Explain the dashboard navigation in looker

Ans.

Looker dashboard navigation allows users to easily access and analyze data visualizations.

  • Users can navigate through different dashboards by clicking on tabs or links.

  • Filters can be applied to customize the data being displayed.

  • Drill-down functionality allows users to explore data in more detail.

  • Users can create bookmarks to save specific views for easy access.

  • Looker also provides search functionality to quickly find specific data or visualizations.

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Q50. what is the custom chart you have worked on

Ans.

I have worked on creating a custom sales performance chart for tracking monthly revenue

  • Utilized Excel to create a custom chart with data from multiple sources

  • Implemented color coding to highlight trends and outliers

  • Added interactive features for easy data analysis

  • Presented the chart to senior management for decision-making purposes

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Q51. What is pivot chart?

Ans.

A pivot chart is a graphical representation of data from a pivot table in Excel, allowing for easy visualization and analysis.

  • Pivot charts are linked to pivot tables, updating automatically when the table data changes

  • They can display data in various chart types like bar, line, pie, etc.

  • Users can easily filter and manipulate data in pivot charts for better insights

  • Pivot charts are commonly used in Excel for data analysis and reporting

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Q52. What can we say by seeing this graph

Ans.

The graph shows a steady increase in sales over the past year.

  • The graph indicates a positive trend in sales performance.

  • There is a clear upward trajectory in the sales data.

  • The sales figures have been consistently improving over time.

  • The company's revenue appears to be growing steadily.

  • There may have been successful marketing campaigns or product launches contributing to the sales growth.

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Q53. How you make understand your dashboard to non technical person

Ans.

I use simple language, visuals, and real-life examples to explain the dashboard to non-technical individuals.

  • Use simple language and avoid technical jargon

  • Include visuals like charts and graphs to make data easier to understand

  • Provide real-life examples to illustrate the data and its implications

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Q54. Fetching data from an api and showing the result

Ans.

To fetch data from an API and show the result, use HTTP requests and parse the response data.

  • Identify the API endpoint and required parameters

  • Make an HTTP request using a library like Axios or Fetch

  • Parse the response data using JSON.parse()

  • Display the data in the desired format, such as a table or list

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Q55. Python code for data visualization.

Ans.

Python's popular libraries for data visualization are Matplotlib, Seaborn, and Plotly.

  • Matplotlib is a basic library for creating static, interactive, and animated visualizations.

  • Seaborn is a high-level interface for creating informative and attractive statistical graphics.

  • Plotly is a web-based library for creating interactive visualizations and dashboards.

  • Use Pandas for data manipulation and NumPy for numerical computing.

  • Use Jupyter Notebook for creating and sharing data visu...read more

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Q56. Data visualisation using Excel

Ans.

Excel is a powerful tool for data visualization. It offers various chart types and customization options.

  • Select the data range and choose the chart type from the Insert tab

  • Customize the chart by adding titles, labels, and formatting options

  • Use conditional formatting to highlight specific data points

  • Create pivot tables to summarize and analyze large datasets

  • Utilize Excel's built-in functions for calculations and data manipulation

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Q57. connections in tableau

Ans.

Connections in Tableau refer to the relationships between data sources and how they are linked together in a visualization.

  • Connections in Tableau are established by creating joins between tables or blending data from different sources.

  • Primary keys and foreign keys are commonly used to establish connections between tables.

  • Tableau allows for both inner and outer joins to combine data from multiple sources.

  • Data blending is used when the data sources have no common fields to join...read more

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Q58. data visualization techniques you have studied and used

Ans.

I have studied and used various data visualization techniques including bar charts, line graphs, scatter plots, and heat maps.

  • I have experience creating bar charts to compare data across categories

  • I have used line graphs to show trends over time

  • I have created scatter plots to identify correlations between variables

  • I have used heat maps to visualize data density and identify patterns

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Q59. Issue faced while visualization on tablau

Ans.

Issues faced while visualizing on Tableau

  • Data not properly formatted

  • Incorrect use of chart types

  • Inadequate labeling and formatting

  • Poor data quality

  • Lack of understanding of Tableau features

  • Slow performance with large datasets

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Q60. Visualization use cases

Ans.

Visualization is used to represent data in a graphical format for better understanding.

  • Identifying trends and patterns in data

  • Comparing data sets

  • Showing relationships between variables

  • Presenting data to stakeholders

  • Exploring data for insights

  • Creating dashboards for monitoring

  • Visualizing geographic data

  • Displaying complex data in a simple way

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Q61. Charts and their required data types to plot them

Ans.

Different types of charts require different data types to plot them.

  • Line charts require numerical data

  • Bar charts require categorical data

  • Pie charts require numerical data that adds up to 100%

  • Scatter plots require numerical data for both x and y axes

  • Heat maps require numerical data for both x and y axes, and a third numerical value for the color intensity

  • Bubble charts require numerical data for both x and y axes, and a third numerical value for the size of the bubbles

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Q62. Type of Filters in Tableau.

Ans.

Tableau offers various types of filters including quick filters, context filters, and data source filters.

  • Quick filters allow users to easily filter data by selecting values from a list.

  • Context filters are applied before other filters, affecting the data visible to subsequent filters.

  • Data source filters limit the data available to Tableau by filtering data at the data source level.

  • Other types of filters include extract filters, top N filters, and relative date filters.

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Q63. Data visualization rationale

Ans.

Data visualization helps to communicate complex information in a clear and concise manner.

  • Data visualization allows for easier interpretation and analysis of data

  • It can highlight patterns and trends that may not be immediately apparent in raw data

  • Visualizations can be tailored to specific audiences and purposes

  • Examples include charts, graphs, maps, and infographics

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Q64. Design and Develop Data Visualization Project

Ans.

Develop a data visualization project

  • Identify the data to be visualized

  • Choose appropriate visualization tools

  • Design the user interface

  • Implement the project using programming languages such as Python, R, or JavaScript

  • Test and refine the project based on user feedback

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Q65. Context filters in tableau ?

Ans.

Context filters in Tableau allow users to control the scope of the data being analyzed by defining specific filters for certain worksheets or dashboards.

  • Context filters are used to limit the data being analyzed in Tableau to a specific subset.

  • They can be applied to individual worksheets or entire dashboards.

  • Context filters are useful for focusing on specific segments of data without affecting the overall analysis.

  • They can be created by right-clicking on a filter and selecting...read more

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Q66. Types of LODs in Tableau

Ans.

Types of LODs in Tableau include Fixed, Include, and Exclude.

  • Fixed LOD: Computes a value using specified dimensions, regardless of the visualization level.

  • Include LOD: Computes a value at a specified level of detail, including dimensions not in the visualization.

  • Exclude LOD: Computes a value at a specified level of detail, excluding dimensions not in the visualization.

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Q67. Componets of Tableau ? What are the different connection is there in Tableau ?

Ans.

Tableau components include Desktop, Server, Prep, Online, Public. Different connections include live, extract, ODBC, cloud, etc.

  • Tableau components: Desktop, Server, Prep, Online, Public

  • Different connections: Live, Extract, ODBC, Cloud, etc.

  • Live connection: Directly connects to the data source and updates in real-time

  • Extract connection: Data is extracted and stored in Tableau's proprietary format for faster performance

  • ODBC connection: Connects to databases using ODBC drivers

  • Cl...read more

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Q68. What tool tableau use for optimization of deployments?

Ans.

Tableau uses Tableau Server for optimization of deployments.

  • Tableau Server provides centralized management and scalability for Tableau deployments.

  • It allows for easy sharing and collaboration of dashboards and data sources.

  • Tableau Server also offers features such as load balancing, failover, and backup and recovery.

  • It can be deployed on-premises or in the cloud, depending on the organization's needs.

  • Tableau also offers a tool called Tableau Prep Conductor for managing data pr...read more

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Q69. How can we share a power bi report with an external user?

Ans.

To share a Power BI report with an external user, we can use the Publish to Web feature or share it via email.

  • Use the Publish to Web feature to generate an embed code that can be shared with external users

  • Ensure that the report contains only non-sensitive data before using the Publish to Web feature

  • Alternatively, share the report via email by granting access to the external user's email address

  • The external user must have a Power BI account to view the report

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Q70. Describe your tableau dashboards and thought process behind building them.

Ans.

I have built interactive Tableau dashboards that provide actionable insights for business decision-making.

  • I start by understanding the business objectives and key metrics to be tracked.

  • I gather and clean the relevant data to ensure accuracy and completeness.

  • I design the dashboard layout to present the data in a visually appealing and intuitive manner.

  • I use Tableau's features like filters, parameters, and calculated fields to enable interactivity.

  • I incorporate various visualiz...read more

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Q71. how to optimize tableau dashboard

Ans.

Optimizing Tableau dashboard involves simplifying visuals, reducing clutter, optimizing data sources, and utilizing performance tuning techniques.

  • Simplify visuals by removing unnecessary elements and focusing on key metrics

  • Reduce clutter by organizing data in a logical manner and using filters effectively

  • Optimize data sources by cleaning and aggregating data before connecting to Tableau

  • Utilize performance tuning techniques such as extracting data, using data blending instead ...read more

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Q72. Give me details about the data visualisation tools you have worked on

Ans.

I have experience working with Tableau, Power BI, and Google Data Studio for data visualization.

  • Proficient in creating interactive dashboards and reports using Tableau

  • Utilized Power BI for data analysis and visualization to track key performance indicators

  • Experience in designing visually appealing charts and graphs in Google Data Studio

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Q73. whats bookmark in powerBI

Ans.

A bookmark in Power BI is a feature that allows users to save the current state of a report, including filters, slicers, and visuals.

  • Bookmarks can be used to save different views of a report for easy navigation.

  • Users can create bookmarks to save specific filter selections or highlight certain data points.

  • Bookmarks can also be used to create interactive presentations by linking different bookmarks together.

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Q74. what are the different types of charts in tableau

Ans.

Tableau offers a variety of chart types to visualize data effectively.

  • Bar chart - used to compare different categories

  • Line chart - shows trends over time

  • Pie chart - displays parts of a whole

  • Scatter plot - shows relationships between two variables

  • Heat map - visualizes data using color intensity

  • Tree map - displays hierarchical data using nested rectangles

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Q75. On tableau - what is row level security ?

Ans.

Row level security in Tableau allows users to restrict access to specific rows of data based on their role or permissions.

  • Row level security is used to control which rows of data a user can access in Tableau.

  • It is typically implemented by creating a security table that defines the relationship between users and the data they can access.

  • Users can be granted access to specific rows based on their role or permissions.

  • Row level security helps ensure that users only see the data t...read more

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Q76. How to create dashboard in Power BI for larger data?

Ans.

To create a dashboard in Power BI for larger data, use data modeling, optimize data loading, utilize DAX calculations, and design visually appealing visuals.

  • Utilize data modeling to structure and organize large datasets efficiently

  • Optimize data loading by using query folding and reducing unnecessary data

  • Leverage DAX calculations for complex calculations and measures

  • Design visually appealing visuals using various chart types and interactive elements

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Q77. How to publish on to tableau server

Ans.

To publish on Tableau Server, use Tableau Desktop to create a workbook, then save it to Tableau Server.

  • Create a workbook in Tableau Desktop with the desired visualizations and data connections

  • Save the workbook to Tableau Server by selecting 'Server' > 'Publish Workbook'

  • Choose the project and permissions for the workbook on Tableau Server

  • Access the published workbook on Tableau Server through a web browser or Tableau Desktop

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Q78. Draw Box-plot and explain its characteristics

Ans.

Box-plot is a visual representation of the distribution of a dataset, showing the median, quartiles, and outliers.

  • Box-plot displays the median (middle line), quartiles (box), and outliers (dots or lines).

  • The length of the box represents the interquartile range (IQR).

  • Whiskers extend to the smallest and largest non-outlier data points within 1.5 times the IQR from the quartiles.

  • Outliers are plotted individually as dots or lines beyond the whiskers.

  • Box-plots are useful for compa...read more

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Q79. LOD in tableau and itโ€™s types

Ans.

LOD in Tableau stands for Level of Detail and refers to the ability to control the level of aggregation in visualizations.

  • LOD expressions allow you to compute values at different levels of detail in Tableau.

  • There are three types of LOD expressions: INCLUDE, EXCLUDE, and FIXED.

  • INCLUDE LOD expressions compute values at the specified level of detail and then aggregate them up to the view level.

  • EXCLUDE LOD expressions exclude the specified dimension from the view level of detail....read more

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Q80. Types of visualizations

Ans.

Visualizations can be categorized into various types such as charts, graphs, maps, infographics, and dashboards.

  • Charts - bar charts, line charts, pie charts

  • Graphs - network graphs, scatter plots

  • Maps - choropleth maps, point maps

  • Infographics - data visualizations combined with text and images

  • Dashboards - interactive visual displays of data

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Q81. What are parameters in Tableau

Ans.

Parameters in Tableau are user-defined values that can be used to control aspects of a visualization.

  • Parameters allow users to interact with a visualization by changing values such as filters, calculations, and reference lines.

  • They can be used to create dynamic visualizations that respond to user input.

  • Parameters can be created by right-clicking on a field or by selecting 'Create Parameter' from the Analysis menu.

  • Examples of parameters include date ranges, thresholds, and tar...read more

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Q82. What is drill down and drill through in Power bi

Ans.

Drill down and drill through are interactive features in Power BI that allow users to explore data in more detail.

  • Drill down allows users to navigate from a higher level of data to a more detailed level by clicking on a visual element, such as a bar chart or table.

  • Drill through allows users to access a more detailed report or page by clicking on a specific data point within a visual element.

  • Both features provide users with the ability to analyze data in a more granular way an...read more

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Q83. How to make dashboards?

Ans.

Dashboards can be made using various tools like Tableau, Power BI, Excel, etc.

  • Identify the purpose of the dashboard

  • Choose the appropriate tool for creating the dashboard

  • Select the relevant data sources

  • Design the layout and visualizations

  • Add filters and interactivity

  • Test and refine the dashboard

Add your answer
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Q84. What are the ways to optimize Tableau dashboard?

Ans.

Optimizing Tableau dashboard involves improving performance, usability, and visual appeal.

  • Limit the number of worksheets on a dashboard to improve performance

  • Use filters and parameters effectively to allow for interactivity

  • Optimize data source connections for faster loading times

  • Utilize dashboard actions to create dynamic interactions

  • Design with user experience in mind to ensure clarity and ease of use

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Q85. Some Common Data Visualization Tools That Have Used?

Ans.

Some common data visualization tools include Tableau, Power BI, and Google Data Studio.

  • Tableau

  • Power BI

  • Google Data Studio

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Q86. Build charts in tableau

Ans.

Tableau is a data visualization tool used to build interactive charts and dashboards.

  • Connect to data source

  • Drag and drop dimensions and measures

  • Choose chart type

  • Customize colors, labels, and formatting

  • Add filters and parameters

  • Create calculated fields

  • Build interactive dashboards

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Q87. Lod in tableau , Row level security

Ans.

Row level security in Tableau allows users to restrict access to specific rows of data based on user roles or permissions.

  • Row level security in Tableau is implemented by creating user filters based on user roles or permissions.

  • Users can only see data that they have been granted access to, based on the row level security settings.

  • Row level security can be set up using Tableau Server or Tableau Online.

  • Example: A sales manager can only see sales data for their region, while a ma...read more

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Q88. Is it possible to update data in Tableau Extract?

Ans.

Yes, it is possible to update data in Tableau Extract.

  • Tableau Extracts can be refreshed to update data

  • Data can be added, removed or modified in the data source and then refreshed in Tableau

  • Extracts can be set to refresh automatically or manually

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Q89. Difference between tableau and power bi

Ans.

Tableau is more user-friendly and better for data visualization, while Power BI is more powerful for data manipulation and integration.

  • Tableau is known for its ease of use and intuitive drag-and-drop interface.

  • Power BI has more advanced data manipulation capabilities and better integration with Microsoft products.

  • Tableau is better for creating visually appealing dashboards and reports, while Power BI is better for complex data analysis and modeling.

  • Power BI offers more advanc...read more

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Q90. Make a dashboard using company data

Ans.

I will create a dashboard using company data to visualize key metrics and trends.

  • Gather relevant company data such as sales, expenses, customer feedback, etc.

  • Choose appropriate visualization tools like charts, graphs, and tables.

  • Include key performance indicators (KPIs) to track progress and goals.

  • Ensure the dashboard is user-friendly and interactive for easy analysis.

  • Regularly update the dashboard to reflect real-time data changes.

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Q91. Types of charts and uses

Ans.

Different types of charts serve different purposes in data analysis and visualization.

  • Bar chart - compares categories of data

  • Line chart - shows trends over time

  • Pie chart - displays parts of a whole

  • Scatter plot - shows relationship between two variables

  • Histogram - displays distribution of data

Add your answer
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Q92. How do you visualize the things In tableau

Ans.

Visualize data in Tableau using various charts and graphs.

  • Select appropriate chart type based on data and analysis goal

  • Use color, size, and shape to encode additional information

  • Create interactive dashboards for exploration and analysis

  • Utilize Tableau's built-in features such as filters and parameters

  • Consider audience and design for effective communication

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Q93. What are bookmarks in Power BI and how to restrict the filters from affecting the visual data while using bookmarks?

Ans.

Bookmarks in Power BI are used to save the current state of a report page, including filters, slicers, and visuals.

  • Bookmarks allow users to save specific views of a report page for easy navigation.

  • To restrict filters from affecting visual data when using bookmarks, you can use the 'Edit interactions' feature to control how visuals interact with each other.

  • By setting the interactions between visuals to 'None' for certain bookmarks, you can ensure that filters do not affect the...read more

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Q94. What are the types of the dashboards you have worked in Tableau?

Ans.

I have worked on various types of dashboards in Tableau including interactive dashboards, performance dashboards, and executive dashboards.

  • Interactive dashboards

  • Performance dashboards

  • Executive dashboards

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Q95. Difference on multiple tableau files (.twb,. Twice)

Ans.

TWB files are Tableau workbook files that contain data and visualizations, while TWBX files are Tableau packaged workbook files that contain data and visualizations along with any external files.

  • TWB files are used to create and save Tableau workbooks

  • TWBX files are used to package Tableau workbooks along with any external files

  • TWBX files can be easily shared and opened on other computers

  • TWB files require the data source to be available on the computer where it is opened

  • TWBX fi...read more

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Q96. explain the power bi visuals

Ans.

Power BI visuals are interactive graphical representations of data that help users analyze and understand information.

  • Power BI visuals include charts, graphs, maps, tables, and custom visuals.

  • Users can customize visuals by changing colors, fonts, and other properties.

  • Visuals can be interactive, allowing users to drill down into data for more detailed analysis.

  • Examples of Power BI visuals include bar charts, pie charts, line graphs, and scatter plots.

Add your answer
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Q97. How does Power BI help in visualisation? Give me difference between basic and advance dashboards

Ans.

Power BI helps in visualizing data through interactive and customizable dashboards.

  • Power BI allows users to create visually appealing charts, graphs, and maps to represent data in a meaningful way.

  • Basic dashboards in Power BI typically include simple visuals like bar charts, line graphs, and pie charts to display key metrics.

  • Advanced dashboards in Power BI involve more complex visuals like heat maps, scatter plots, and custom visuals created using Power BI's developer tools.

  • A...read more

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Q98. calculate the percentage of sales of states of the whole region in tableau

Ans.

To calculate the percentage of sales of states of the whole region in Tableau.

  • Create a bar chart with states on the x-axis and sales on the y-axis

  • Add a table calculation to compute the percentage of total sales for each state

  • Format the chart to display the percentage values

  • Use the 'Region' field to filter the data to the desired region

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Q99. Create a dashboard using Power Bi or Tableau.

Ans.

Create a dashboard using Power Bi or Tableau

  • Gather relevant data sources for analysis

  • Identify key performance indicators (KPIs) to track

  • Design visually appealing and user-friendly dashboard

  • Utilize interactive features for data exploration

  • Include filters and slicers for customization

  • Consider audience needs and tailor dashboard accordingly

Add your answer
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Q100. how to create dashboards

Ans.

Creating dashboards involves selecting relevant data, designing visualizations, and arranging them in a user-friendly layout.

  • Identify key metrics and data sources to include in the dashboard

  • Design appropriate visualizations such as bar charts, line graphs, and maps

  • Arrange visualizations in a logical and intuitive layout

  • Use filters and parameters to allow users to interact with the data

  • Add annotations and titles to provide context and insights

Add your answer
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