Greyb Tableau Developer Interview Questions and Answers

Q1. What are the filters? Name the different filters in tableau?
Ans. 
Filters are used to limit the data displayed in a visualization. There are different types of filters in Tableau.
• Types of filters include: dimension filters, measure filters, context filters, table calculation filters, and extract filters.

• Dimension filters limit the data based on specific dimensions, such as date or region.

• Measure filters limit the data based on specific measures, such as sales or profit.

• Context filter...read more
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Q2. What are the data types supported in tableau?
Ans. 
Tableau supports various data types including string, integer, float, date, boolean, and geographic data.
• String: text data

• Integer: whole numbers

• Float: decimal numbers

• Date: date and time data

• Boolean: true/false data

• Geographic: latitude and longitude data

• Examples: 'John Smith' (string), 25 (integer), 3.14 (float), 01/01/2021 (date), true (boolean), (latitude, longitude) (geographic)
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Q3. 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 w...read more
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Q4. Compare qlikview with tableau?
Ans. 
Tableau is more user-friendly and has better visualization capabilities than QlikView.
• Tableau has a more intuitive drag-and-drop interface

• Tableau has a wider range of visualization options

• Tableau has better integration with other data sources

• QlikView has better data modeling capabilities

• QlikView has better performance with large datasets
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Q5. What is the latest version of tableau?
Ans. 
The latest version of Tableau is 2021.3.
• 2021.3 was released on September 14, 2021.

• New features include improved data modeling capabilities and enhanced analytics.

• Previous versions include 2021.2, 2021.1, and 2020.4.
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Q6. What is data vesulization?
Ans. 
Data visualization is the graphical representation of data to help understand patterns, trends, and insights.
• Data visualization uses charts, graphs, and maps to present data visually.

• It helps in identifying patterns, correlations, and outliers in data.

• Examples include bar charts, line graphs, scatter plots, and heat maps.
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Q7. What is aggregation and disaggregation of data?
Ans. 
Aggregation is the process of combining data into a summary form, while disaggregation is the opposite, breaking down summary data into its individual components.
• Aggregation involves grouping data and performing calculations on the grouped data.

• Disaggregation involves breaking down summary data to reveal the individual data points.

• Aggregation is useful for analyzing trends and patterns at a higher level.

• Disaggregation ...read more
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Q8. What is disadvantage of context filters?
Ans. 
Context filters can slow down performance and limit interactivity.
• Context filters create a temporary table that affects the performance of the workbook.

• Using multiple context filters can further degrade performance.

• Context filters limit the interactivity of other filters and actions.

• Context filters may not work well with certain data sources or complex calculations.

• Removing or modifying context filters requires re-comp
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Conduct was tough because there was a time limit, strong focus on vocabulary

Q1. Guesstimate - number of kirana stores in Delhi
Ans. 
There are approximately 50,000 to 60,000 kirana stores in Delhi.
• Kirana stores are small neighborhood shops that sell groceries and household items.

• Delhi has a population of over 18 million people, making it a hub for kirana stores.

• The number of kirana stores in Delhi is estimated to be around 50,000 to 60,000.

• This number may vary depending on the definition of a kirana store and the source of the estimate.
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Q2. How many tennis ball can be fitted in 10*10 room
Ans. 
The number of tennis balls that can fit in a 10*10 room depends on the size of the tennis ball and the available space in the room.
• The size of the tennis ball needs to be specified

• The available space in the room needs to be calculated

• The calculation can be done using the formula for the volume of a sphere and the volume of the room

• Assuming the tennis ball has a diameter of 6 cm, the number of balls that can fit in the
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Q3. Some basic questions on machine learning and SQL
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Q1. Some discussion on hands on projects
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Q2. Guesstimate question on prediction for patients coming to a hospital
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Q1. Salary negotiation and brief about yourself
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Q1. Sas sql,proc mean
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Q2. Base sas Programming
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Q1. What are the filters? Name the different filters in tableau?
Ans. 
Filters are used to limit the data displayed in a visualization. There are different types of filters in Tableau.
• Types of filters include: dimension filters, measure filters, context filters, table calculation filters, and extract filters.

• Dimension filters limit the data based on specific dimensions, such as date or region.

• Measure filters limit the data based on specific measures, such as sales or profit.

• Context filter...read more
Answered by AI
View 6 more answers
Q2. What are the data types supported in tableau?
Ans. 
Tableau supports various data types including string, integer, float, date, boolean, and geographic data.
• String: text data

• Integer: whole numbers

• Float: decimal numbers

• Date: date and time data

• Boolean: true/false data

• Geographic: latitude and longitude data

• Examples: 'John Smith' (string), 25 (integer), 3.14 (float), 01/01/2021 (date), true (boolean), (latitude, longitude) (geographic)
Answered by AI
View 4 more answers
Q3. 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 w...read more
Answered by AI
View 3 more answers
Q4. Compare qlikview with tableau?
Ans. 
Tableau is more user-friendly and has better visualization capabilities than QlikView.
• Tableau has a more intuitive drag-and-drop interface

• Tableau has a wider range of visualization options

• Tableau has better integration with other data sources

• QlikView has better data modeling capabilities

• QlikView has better performance with large datasets
Answered by AI
View 2 more answers
Q5. What is the latest version of tableau?
Ans. 
The latest version of Tableau is 2021.3.
• 2021.3 was released on September 14, 2021.

• New features include improved data modeling capabilities and enhanced analytics.

• Previous versions include 2021.2, 2021.1, and 2020.4.
Answered by AI
View 2 more answers
Q6. What is data vesulization?
Ans. 
Data visualization is the graphical representation of data to help understand patterns, trends, and insights.
• Data visualization uses charts, graphs, and maps to present data visually.

• It helps in identifying patterns, correlations, and outliers in data.

• Examples include bar charts, line graphs, scatter plots, and heat maps.
Answered by AI
View 1 more answer
Q7. What is aggregation and disaggregation of data?
Ans. 
Aggregation is the process of combining data into a summary form, while disaggregation is the opposite, breaking down summary data into its individual components.
• Aggregation involves grouping data and performing calculations on the grouped data.

• Disaggregation involves breaking down summary data to reveal the individual data points.

• Aggregation is useful for analyzing trends and patterns at a higher level.

• Disaggregation ...read more
Answered by AI
View 2 more answers
Q8. What is disadvantage of context filters?
Ans. 
Context filters can slow down performance and limit interactivity.
• Context filters create a temporary table that affects the performance of the workbook.

• Using multiple context filters can further degrade performance.

• Context filters limit the interactivity of other filters and actions.

• Context filters may not work well with certain data sources or complex calculations.

• Removing or modifying context filters requires re-comp
Answered by AI
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Q1. 1. Self join related question
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Q2. 2. Pivot and Recursive CTE in sql
Ans. 
Pivot and Recursive CTE are advanced SQL techniques used for data transformation and hierarchical querying.
• Pivot is used to convert rows into columns based on a specific column value.

• Recursive CTE is used to query hierarchical data, such as organizational structures or bill of materials.

• Example of Pivot: SELECT * FROM table_name PIVOT (SUM(value) FOR column_name IN (value1, value2, value3))

• Example of Recursive CTE: WIT...read more
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Q1. Basics of Tableau Desktop, server, public and work experience, project details
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Q1. Practical implementation of few features on Tableau Desktop
Ans. 
Implementing features on Tableau Desktop for data visualization and analysis
• Create interactive dashboards for easy data exploration

• Use calculated fields to perform complex calculations

• Utilize parameters for dynamic filtering of data

• Incorporate custom shapes and images for enhanced visualizations
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Q1. General HR questions
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Q1. Basics of Tableau Desktop, server, public and work experience, projects
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Q1. Practical implementation of few features on Tableau Desktop
Ans. 
Practical implementation of features on Tableau Desktop
• Creating interactive dashboards

• Using calculated fields for data manipulation

• Utilizing parameters for dynamic filtering

• Incorporating advanced analytics like forecasting

• Implementing data blending for combining multiple data sources
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Q1. Multiple questions about Java
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Q2. Layers in and application
Ans. 
Layers in an application refer to the different components or levels of software architecture that work together to provide functionality.
• Layers help to organize code and separate concerns, making it easier to maintain and scale the application.

• Common layers in an application include presentation layer, business logic layer, and data access layer.

• Each layer has a specific responsibility and interacts with other layers ...read more
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Q1. Reason to go from BTech to business analytics
Ans. 
Transition from technical to analytical role for broader career opportunities and interest in data-driven decision making.
• Interest in leveraging technical skills for data analysis and problem-solving

• Desire for broader career opportunities beyond traditional engineering roles

• Passion for data-driven decision making and business strategy

• Recognizing the growing demand for analytics professionals in various industries
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Q2. Questions on interpersonal skills
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