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Power BI MCQs

Here, we have provided the top Power BI multiple-choice questions and answers with explanations. You can go through these questions to learn and enhance your skills in Power BI. These questions are also helpful for preparing for exams like the Power BI certification courses and other related professional certifications.

List of Power BI MCQs

Here is a list of the top 50 Power BI multiple-choice questions and answers, along with explanations:

1. What is Power BI primarily used for?

  1. Website Development
  2. Data Visualization and Business Intelligence
  3. Software Testing
  4. Video Editing

Answer: B) Data Visualization and Business Intelligence

Explanation:

Power BI is a Microsoft tool used for business intelligence, enabling users to visualize and analyze data effectively.

2. Which component of Power BI is used for creating reports?

  1. Power BI Service
  2. Power BI Desktop
  3. Power BI Mobile
  4. Power Query

Answer: B) Power BI Desktop

Explanation:

Power BI Desktop is the primary tool for creating and designing reports before publishing them to Power BI Service.

3. What is the purpose of Power Query in Power BI?

  1. Data Modeling
  2. Data Transformation and Cleaning
  3. Report Publishing
  4. Creating Visualizations

Answer: B) Data Transformation and Cleaning

Explanation:

Power Query helps in transforming, cleaning, and reshaping data before using it for visualization in Power BI.

4. Which data connectivity mode in Power BI allows real-time data access?

  1. Import Mode
  2. DirectQuery Mode
  3. Hybrid Mode
  4. Static Mode

Answer: B) DirectQuery Mode

Explanation:

DirectQuery Mode allows Power BI to fetch real-time data from the source without storing it in memory.

5. What is a Power BI dashboard?

  1. A single-page interactive visualization
  2. A SQL database
  3. A multi-page report
  4. A cloud storage solution

Answer: A) A single-page interactive visualization

Explanation:

A Power BI dashboard is a single-page (one-screen) summary that provides key insights using visual elements.

6. What is the default aggregation method for numeric values in Power BI?

  1. Sum
  2. Count
  3. Average
  4. Min

Answer: A) Sum

Explanation:

By default, Power BI aggregates numeric values using the Sum function, though users can change this to other options like Average or Count.

7. What language is used in Power BI for data modeling?

  1. SQL
  2. DAX (Data Analysis Expressions)
  3. Python
  4. HTML

Answer: B) DAX (Data Analysis Expressions)

Explanation:

DAX is the formula language used in Power BI for creating measures, calculated columns, and aggregations.

8. What is Power BI Service mainly used for?

  1. Building reports
  2. Viewing and sharing reports
  3. Cleaning and transforming data
  4. Writing SQL queries

Answer: B) Viewing and sharing reports

Explanation:

Power BI Service is a cloud-based platform where users can publish, share, and collaborate on reports.

9. What is Row-Level Security (RLS) in Power BI?

  1. A way to filter rows in visuals
  2. A method to restrict data access based on user roles
  3. A security feature for exporting data
  4. A Power BI license type

Answer: B) A method to restrict data access based on user roles

Explanation:

Row-Level Security (RLS) allows administrators to restrict access to specific data based on user roles.

10. Which visualization is best for showing trends over time?

  1. Pie Chart
  2. Line Chart
  3. Scatter Plot
  4. Funnel Chart

Answer: B) Line Chart

Explanation:

Line Charts are ideal for showing trends over time as they effectively represent data changes over a period.

11. What is the primary function of Power Pivot in Power BI?

  1. Creating visualizations
  2. Data modeling and calculations
  3. Connecting to data sources
  4. Exporting reports

Answer: B) Data modeling and calculations

Explanation:

Power Pivot is used for creating relationships between tables and performing complex calculations using DAX.

12. What type of data source can Power BI NOT connect to?

  1. Excel
  2. SQL Server
  3. PDF Files
  4. Blockchain Ledgers

Answer: D) Blockchain Ledgers

Explanation:

Power BI supports a wide range of data sources, but blockchain ledger integration is not natively supported.

13. What is the purpose of relationships in Power BI?

  1. To link tables for data analysis
  2. To improve report appearance
  3. To filter data in Power Query
  4. To secure Power BI reports

Answer: A) To link tables for data analysis

Explanation:

Relationships in Power BI connect tables to enable more complex data modeling and analysis.

14. What is a calculated column in Power BI?

  1. A visualization element
  2. A custom column created using DAX
  3. A filter option
  4. A method for sharing reports

Answer: B) A custom column created using DAX

Explanation:

Calculated columns use DAX formulas to derive new data based on existing fields.

15. What is the main advantage of using a Power BI Dataflow?

  1. It improves the appearance of dashboards
  2. It allows data transformation before loading into reports
  3. It speeds up DAX calculations
  4. It secures reports against unauthorized access

Answer: B) It allows data transformation before loading into reports

Explanation:

Dataflows allow users to clean and transform data at the Power BI Service level before loading it into reports.

16. What is the purpose of a measure in Power BI?

  1. To format visuals
  2. To perform calculations dynamically
  3. To filter datasets
  4. To create relationships between tables

Answer: B) To perform calculations dynamically

Explanation:

Measures are DAX-based calculations that generate dynamic values for reporting and analysis.

17. What happens when you use the "Drillthrough" feature in Power BI?

  1. It filters data across multiple pages
  2. It changes the chart type
  3. It secures the report
  4. It exports data

Answer: A) It filters data across multiple pages

Explanation:

Drillthrough allows users to click on a visual and navigate to a detailed report filtered by that selection.

18. What is the primary purpose of KPI (Key Performance Indicator) visuals in Power BI?

  1. To display raw data
  2. To measure progress against a goal
  3. To create relationships between tables
  4. To transform datasets

Answer: B) To measure progress against a goal

Explanation:

KPI visuals help track performance by comparing actual values against target values.

19. What is the function of "Bookmarks" in Power BI?

  1. To save report snapshots with specific filters
  2. To create custom measures
  3. To refresh data automatically
  4. To delete datasets

Answer: A) To save report snapshots with specific filters

Explanation:

Bookmarks allow users to save specific states of a report, including filters and slicers.

20. Which Power BI feature is used for natural language querying?

  1. Power Query
  2. Q&A
  3. DirectQuery
  4. Dataflows

Answer: B) Q&A

Explanation:

Q&A allows users to ask questions about their data using natural language and receive visual responses.

28. What is the default aggregation method for numerical fields in Power BI?

  1. Average
  2. Sum
  3. Count
  4. Minimum

Answer: B) Sum

Explanation:

By default, Power BI aggregates numerical fields using the "Sum" function unless specified otherwise.

29. What is a Power BI measure?

  1. A table relationship
  2. A calculated column
  3. A dynamic aggregation created using DAX
  4. A visual component

Answer: C) A dynamic aggregation created using DAX

Explanation:

Measures in Power BI are calculations created using DAX that dynamically respond to filters and user interactions.

30. What is the purpose of Power BI Service?

  1. To create data models
  2. To publish, share, and collaborate on reports
  3. To clean data
  4. To create DAX expressions

Answer: B) To publish, share, and collaborate on reports

Explanation:

Power BI Service is a cloud-based platform for publishing, sharing, and collaborating on Power BI reports.

31. What is an advantage of using Power BI dashboards?

  1. They provide real-time insights
  2. They require coding knowledge
  3. They only work with Microsoft databases
  4. They cannot be shared

Answer: A) They provide real-time insights

Explanation:

Power BI dashboards can display real-time data and provide interactive insights.

32. Which Power BI component is used for data transformation?

  1. Power Query
  2. Power View
  3. Power Pivot
  4. Power BI Service

Answer: A) Power Query

Explanation:

Power Query allows users to clean, transform, and load data before analysis.

33. What does the FILTER function do in DAX?

  1. Sorts data
  2. Filters data based on conditions
  3. Creates new tables
  4. Joins tables

Answer: B) Filters data based on conditions

Explanation:

The FILTER function in DAX returns a subset of a table based on specified conditions.

34. Which feature allows users to apply security restrictions in Power BI?

  1. Data Masking
  2. Role-Based Security
  3. Data Classification
  4. Data Encryption

Answer: B) Role-Based Security

Explanation:

Role-Based Security (RLS) in Power BI allows users to restrict data access based on roles.

35. Which of the following is NOT a Power BI visualization type?

  1. Bar Chart
  2. Pie Chart
  3. Gantt Chart
  4. Waterfall Chart

Answer: C) Gantt Chart

Explanation:

Gantt Charts are not included in Power BI by default but can be added as custom visuals.

36. What does the RELATED function do in DAX?

  1. Returns values from related tables
  2. Filters data
  3. Joins tables
  4. Aggregates values

Answer: A) Returns values from related tables

Explanation:

The RELATED function is used to fetch values from a related table in a data model.

37. What is the primary purpose of a KPI visual in Power BI?

  1. To display trends over time
  2. To compare multiple categories
  3. To track key performance indicators
  4. To filter data

Answer: C) To track key performance indicators

Explanation:

KPI visuals highlight key metrics and compare them against targets.

38. Which Power BI component is used for data modeling?

  1. Power Query
  2. Power Pivot
  3. Power View
  4. Power BI Service

Answer: B) Power Pivot

Explanation:

Power Pivot is used to create relationships and perform calculations on large datasets.

39. What type of file format is used to save a Power BI report?

  1. .xlsx
  2. .pbix
  3. .csv
  4. .json

Answer: B) .pbix

Explanation:

Power BI reports are saved as .pbix files.

40. Which type of chart is best for showing trends over time?

  1. Pie Chart
  2. Bar Chart
  3. Line Chart
  4. Funnel Chart

Answer: C) Line Chart

Explanation:

Line charts effectively show trends and patterns over time.

41. What does a funnel chart represent in Power BI?

  1. Hierarchical data
  2. A process with multiple stages
  3. Geographical data
  4. Comparison of categories

Answer: B) A process with multiple stages

Explanation:

Funnel charts visualize processes with different stages, such as sales funnels.

42. What is the maximum file size for a dataset in Power BI Pro?

  1. 1 GB
  2. 10 GB
  3. 100 MB
  4. 500 MB

Answer: A) 1 GB

Explanation:

In Power BI Pro, the maximum dataset size is 1 GB per file.

43. What is the primary purpose of Power BI's Q&A feature?

  1. To generate automated reports
  2. To create relationships between tables
  3. To answer user queries using natural language
  4. To export data to Excel

Answer: C) To answer user queries using natural language

Explanation:

Power BI’s Q&A feature allows users to ask questions in natural language and get visual responses.

44. What does a slicer in Power BI do?

  1. Filters data interactively
  2. Sorts data automatically
  3. Joins multiple tables
  4. Creates calculated measures

Answer: A) Filters data interactively

Explanation:

Slicers provide an interactive way to filter data in Power BI reports.

45. What is the function of the CALCULATE function in DAX?

  1. Performs aggregation on a column
  2. Applies filters to calculations
  3. Creates relationships between tables
  4. Sorts data

Answer: B) Applies filters to calculations

Explanation:

The CALCULATE function modifies the context of a calculation by applying filters.

46. What type of join does Power BI use by default when creating relationships?

  1. Inner Join
  2. Left Outer Join
  3. Right Outer Join
  4. Full Outer Join

Answer: B) Left Outer Join

Explanation:

Power BI relationships are based on a Left Outer Join, meaning all records from the left table are included.

47. Which Power BI feature helps create paginated reports?

  1. Power View
  2. Power Query
  3. Power BI Report Builder
  4. Power Pivot

Answer: C) Power BI Report Builder

Explanation:

Power BI Report Builder is used to create paginated reports for printing or PDF exports.

48. What is the purpose of a drill-through filter in Power BI?

  1. To create multiple reports
  2. To navigate from one report page to another with filtered data
  3. To group datasets
  4. To export data

Answer: B) To navigate from one report page to another with filtered data

Explanation:

Drill-through filters allow users to click on a data point and navigate to a detailed report page.

49. Which formula language is used for creating measures and calculated columns in Power BI?

  1. SQL
  2. Power Query M
  3. DAX
  4. Python

Answer: C) DAX

Explanation:

DAX (Data Analysis Expressions) is used for writing formulas in Power BI.

50. How often can Power BI refresh data from an on-premise database in the Pro version?

  1. Once per day
  2. 8 times per day
  3. 48 times per day
  4. Unlimited

Answer: B) 8 times per day

Explanation:

In Power BI Pro, data refreshes from on-premise sources can be scheduled up to 8 times per day.

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