Crowd Media Tech MSBI and Power BI Developer Interview Questions and Answers

Q1. What you do as a MSBI developer in your organisation
Ans. Gathering data and load into the SQL server db with the help of SSIS, create stored procedures, user defined functions, performance tuning of SSIS packages, creating interactive, user friendly dashboards and reports in PowerBI as per the requirement.
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Q1. Asked questions in SQL joins
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Q2. Power bi service and their roles
Ans. 
Power BI service is a cloud-based platform for sharing, collaborating, and publishing Power BI reports and dashboards.
• Power BI service allows users to share and collaborate on reports and dashboards in real-time

• It provides a centralized location for managing and publishing Power BI content

• Users can access Power BI service from anywhere with an internet connection

• Power BI service also offers features like data refresh s...read more
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Q1. Asked about my previous employment
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Q1. Scenario based on filter table
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Q2. Find rolling total without reset
Ans. 
Calculate rolling total without resetting at specified interval
• Use DAX formula with functions like CALCULATE, FILTER, and EARLIER

• Create a measure that calculates the running total based on the current and previous rows

• Consider using variables to store intermediate results for efficiency
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Q3. Shift one cell Down in table using dax
Ans. 
Use DAX function to shift one cell down in a table
• Use the LAG function in DAX to shift values down in a column

• Specify the number of rows to shift as a parameter in the LAG function

• Example: LAG([Column], 1) will shift values in 'Column' down by one row
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Power bi desktop in power bi service

Q1. What is power bi
Ans. 
Power BI is a business analytics tool by Microsoft that provides interactive visualizations and business intelligence capabilities.
• Power BI allows users to connect to various data sources and create interactive reports and dashboards.

• Users can easily share and collaborate on reports with others within the organization.

• It offers features like data modeling, data visualization, and data transformation.

• Power BI can be use...read more
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Q2. How creative a dashboard in power query
Ans. 
A creative dashboard in Power Query involves using unique visuals and interactive elements to present data in an engaging way.
• Utilize custom visuals to display data in a visually appealing manner

• Incorporate interactive elements such as slicers and filters for user-friendly navigation

• Use color coding and formatting to highlight important insights

• Include dynamic elements like tooltips and drill-down capabilities

• Experimen...read more
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Q1. Power bi desktop
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Q2. Write the Dax query in data modeling
Ans. 
Write a DAX query in data modeling
• Use CALCULATE function to apply filters and context to calculations

• Use SUMX function to iterate over a table and perform calculations

• Use RELATED function to retrieve related values from other tables
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Q1. What is power pivot
Ans. 
Power Pivot is a data modeling tool in Excel that allows users to create relationships, calculations, and measures for analyzing large datasets.
• Power Pivot is an add-in for Excel that enables users to create data models and perform advanced data analysis.

• It allows users to import and combine data from multiple sources, create relationships between tables, and define calculations and measures.

• Users can create complex ca...read more
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Q2. Creation in dax
Ans. 
Creation in DAX refers to the process of generating new calculated columns or measures in Power BI using Data Analysis Expressions.
• Use DAX functions like CALCULATE, SUMX, AVERAGE, etc. to create new columns or measures

• Understand the data model and relationships to create accurate calculations

• Test the newly created calculations to ensure they are working correctly
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Brief information about Business Intelligence (BI) tools.

Q1. What is the role of Power BI in today's market?
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Q2. What are the differences between Power BI and Tableau?
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Q3. What are some case studies that demonstrate the use of Power BI?
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Q1. What are your salary expectations?
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Q1. What are the components of Power bi
Ans. 
Power BI components include Power Query, Power Pivot, Power View, Power Map, and Power Q&A.
• Power Query: Used for data extraction and transformation.

• Power Pivot: Used for data modeling and analysis.

• Power View: Used for interactive data visualization.

• Power Map: Used for geographical data visualization.

• Power Q&A: Allows users to ask questions in natural language and get answers from data.
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Q2. What is mean by DAX
Ans. 
DAX stands for Data Analysis Expressions and is a formula language used in Power BI for creating custom calculations.
• DAX is used to create custom calculations in Power BI, similar to Excel formulas.

• It can be used to create calculated columns, measures, and calculated tables.

• DAX functions can be used to manipulate data, perform calculations, and create complex expressions.

• Examples of DAX functions include SUM, AVERAGE,
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Q3. What is mean by M language
Ans. 
M language is a powerful data transformation language used in Power Query in Power BI.
• M language is used to transform and clean data in Power BI.

• It is a functional language with a wide range of functions and operators.

• M language is case-sensitive and uses a step-by-step approach to data transformation.

• Examples of M language functions include Table.TransformColumns and List.Transform.
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It was a real-time scenario that they asked about.

Q1. Without RLS how can you implement the security to data?
Ans. 
Implement security to data using row-level security (RLS)
• Use user roles and permissions to restrict access to specific data

• Leverage Power BI's built-in security features such as dataset security and data categorization

• Implement dynamic security based on user context or attributes

• Utilize Power BI's security features like Azure Active Directory integration for authentication and authorization
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