Top 20 Power Bi Interview Questions For Data Analyst Interview

 Top 20 Power Bi Interview Questions For Data Analyst Interview


1. What is Power BI?

Power BI is a business analytics tool developed by Microsoft. It provides interactive visualizations and business intelligence capabilities with an interface that is easy to use for end users.


2. What are the components of Power BI?

Power BI consists of three main components: Power BI Desktop, Power BI Service, and Power BI Mobile.


3. What is Power BI Desktop?

Power BI Desktop is a Windows application used to create and publish Power BI reports and visualizations. It allows users to connect to data, transform it, and create interactive visualizations.


4. What is Power BI Service?

Power BI Service is a cloud-based service that allows users to publish, share, collaborate on, and access Power BI reports and dashboards online.


5. What is Power BI Mobile?

Power BI Mobile is a mobile app available for iOS and Android devices that allows users to access and view Power BI reports and dashboards on their mobile devices.


6. What is a data model in Power BI?

A data model in Power BI is a collection of tables, relationships, and measures that define how data is structured and related to each other. It forms the basis for creating visualizations and reports.


7. What is DAX in Power BI?

DAX (Data Analysis Expressions) is a formula language used in Power BI to create custom calculations, measures, and aggregations on data. It allows users to perform advanced calculations and manipulate data within Power BI.


8. How can you import data into Power BI?

Data can be imported into Power BI from various sources such as Excel files, CSV files, SQL databases, SharePoint lists, and many more. Power BI provides built-in connectors for connecting to these data sources.


9. What are calculated columns in Power BI?

Calculated columns are columns created in Power BI that are calculated based on a formula or expression. They are computed during the data loading process and can be used in visualizations and calculations.


10. What is the difference between calculated columns and measures in Power BI?

Calculated columns are computed during data loading and create a new column in the data model, while measures are calculated on the fly during query execution and provide aggregated values. Measures are used for calculations such as sums, averages, counts, etc.


11. What is a slicer in Power BI?

A slicer is a visual component in Power BI that allows users to filter data in a report or dashboard. It provides a user-friendly way to slice and dice data based on specific criteria.


12. What is Power Query in Power BI?

Power Query is a data transformation and data preparation tool in Power BI. It allows users to connect to various data sources, perform data cleansing and shaping operations, and load the data into Power BI for analysis.


13. How can you create a calculated measure in Power BI?

To create a calculated measure in Power BI, you can use the DAX formula language. Open the Power BI Desktop, go to the "Modeling" tab, and click on "New Measure." Then, write the DAX formula to define the calculation for the measure.


14. What are the different visualization types available in Power BI?

Power BI provides a wide range of visualization types, including bar charts, line charts, pie charts, maps, tables, matrixes, cards, gauges, and many more. These visualizations help in presenting data in a meaningful and interactive way.


15. How can you share Power BI reports with others?

Power BI reports can be shared with others through Power BI Service. You can publish the report to the Power BI cloud service and then share it with specific individuals or groups. Users can view and interact with the report through the web or Power BI Mobile app.


16. Can you schedule data refresh in Power BI?

Yes, Power BI allows you to schedule data refresh for your reports and datasets. You can define a refresh schedule to automatically update the data in Power BI based on a specified frequency (daily, weekly, etc.).


17. What is the Power BI Gateway?

The Power BI Gateway is a component used to establish a secure connection between on-premises data sources and Power BI Service. It allows Power BI to access and refresh data from on-premises sources that are not directly accessible from the cloud.


18. How can you create a dashboard in Power BI?

To create a dashboard in Power BI, you can pin visualizations from different reports or datasets to a single dashboard. Open Power BI Service, navigate to the "Workspace" where your reports are located, and click on "Create" > "Dashboard."


19. What is the difference between a report and a dashboard in Power BI?

A report in Power BI is a collection of visualizations and data tables that provide detailed insights into specific data. A dashboard, on the other hand, is a summarized view of important metrics and visualizations from one or more reports.

20. How can you customize the appearance of Power BI reports and dashboards?

Power BI provides various options to customize the appearance of reports and dashboards. You can change the theme, colors, fonts, and layout of visualizations. You can also add images, shapes, and text boxes to enhance the design.

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