Top 20 Interview Questions with Answers for Power BI

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1. What is a Power BI app?
   Answer: A Power BI app is a collection of dashboards, reports, and datasets that are organized and shared with specific groups of users. Apps can be customized with branding and security settings, and can be accessed through the Power BI service or mobile app.
2. How do you create a scatter chart in Power BI?
   Answer: To create a scatter chart in Power BI, you can use the Scatter Chart visual and define the fields for the X and Y axes, as well as any additional fields for coloring and labeling the chart.
3. What is a Power BI parameter?
   Answer: A Power BI parameter is a variable that can be used to control values or filters in reports and dashboards. Parameters can be used to create interactive elements and provide flexibility in data analysis.
4. How do you create a donut chart in Power BI?
   Answer: To create a donut chart in Power BI, you can use the Donut Chart visual and define the fields for the category and value columns, as well as any additional fields for coloring and labeling the chart.
5. What is a Power BI data model?
   Answer: A Power BI data model is the structure that defines how data is related and organized in Power BI. The data model is created based on imported or connected data sources and can be modified using Power BI Desktop.
6. How do you create a waterfall chart in Power BI?
   Answer: To create a waterfall chart in Power BI, you can use the Waterfall Chart visual and define the fields for the category and value columns, as well as any additional fields for coloring and labeling the chart.
7. What is a Power BI template?
   Answer: A Power BI template is a pre-built file that contains a collection of dashboards, reports, and datasets that can be used as a starting point for creating new content. Templates can be customized and shared with others in an organization.
8. How do you create a tree diagram in Power BI?
   Answer: To create a tree diagram in Power BI, you can use the Tree visual and define the fields for the parent and child columns, as well as any additional fields for coloring and labeling the chart.
9. What is a Power BI dashboard?
   Answer: A Power BI dashboard is a collection of visualizations, reports, and other content that provides a high-level view of key performance indicators and trends. Dashboards can be shared with others in an organization and can be accessed through the Power BI service or mobile app.
10. How do you create a heat map in Power BI?
    Answer: To create a heat map in Power BI, you can use the Heat Map visual and define the fields for the row and column categories, as well as the value used for coloring the cells.
11. What is a Power BI gateway?
    Answer: A Power BI gateway is a software component that connects on-premises data sources to the Power BI service. Gateways allow data to be refreshed and updated in real-time, and can be installed on a server or client machine.
12. How do you create a table visualization in Power BI?
    Answer: To create a table visualization in Power BI, you can use the Table visual and define the fields for the columns and rows.
13. What is a Power BI dataflow?
    Answer: A Power BI dataflow is a process for ETL (extract, transform, load) of data from various sources into a common data model. Dataflows allow data to be transformed, enriched and shaped for further analysis.
14. How do you create a gauge chart in Power BI?
    Answer: To create a gauge chart in Power BI, you can use the Gauge visual and define the fields for the value, minimum and maximum.
15. What is a Power BI workspace?
    Answer: A Power BI workspace is a shared environment where users can collaborate and organize content such as dashboards, reports, and datasets. Workspaces can be customized with specific access levels and security settings.
16. How do you create a matrix visualization in Power BI?
    Answer: To create a matrix visualization in Power BI, you can use the Matrix visual and define the fields for the columns, rows and values.
17. What is a Power BI report server?
    Answer: A Power BI report server is an on-premises solution for publishing and sharing Power BI reports within an organization. Report servers allow for customization of security settings and can be accessed through a web browser or mobile app.
18. How do you create a KPI in Power BI?
    Answer: To create a KPI (key performance indicator) in Power BI, you can use the KPI visual and define the fields for the value, target and trend.
19. What is a Power BI workspace collection?
    Answer: A Power BI workspace collection is a deprecated feature that allowed users to create multiple workspaces under a single instance of Power BI. This feature has been replaced by shared and personal workspaces.
20. How do you create a funnel chart in Power BI?
    Answer: To create a funnel chart in Power BI, you can use the Funnel visual and define the fields for the category and value columns, as well as any additional fields for coloring and labeling the chart.

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