Home »
MCQs
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?
- Website Development
- Data Visualization and Business Intelligence
- Software Testing
- 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?
- Power BI Service
- Power BI Desktop
- Power BI Mobile
- 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?
- Data Modeling
- Data Transformation and Cleaning
- Report Publishing
- 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?
- Import Mode
- DirectQuery Mode
- Hybrid Mode
- 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?
- A single-page interactive visualization
- A SQL database
- A multi-page report
- 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?
- Sum
- Count
- Average
- 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?
- SQL
- DAX (Data Analysis Expressions)
- Python
- 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?
- Building reports
- Viewing and sharing reports
- Cleaning and transforming data
- 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?
- A way to filter rows in visuals
- A method to restrict data access based on user roles
- A security feature for exporting data
- 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?
- Pie Chart
- Line Chart
- Scatter Plot
- 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?
- Creating visualizations
- Data modeling and calculations
- Connecting to data sources
- 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?
- Excel
- SQL Server
- PDF Files
- 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?
- To link tables for data analysis
- To improve report appearance
- To filter data in Power Query
- 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?
- A visualization element
- A custom column created using DAX
- A filter option
- 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?
- It improves the appearance of dashboards
- It allows data transformation before loading into reports
- It speeds up DAX calculations
- 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?
- To format visuals
- To perform calculations dynamically
- To filter datasets
- 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?
- It filters data across multiple pages
- It changes the chart type
- It secures the report
- 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?
- To display raw data
- To measure progress against a goal
- To create relationships between tables
- 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?
- To save report snapshots with specific filters
- To create custom measures
- To refresh data automatically
- 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?
- Power Query
- Q&A
- DirectQuery
- 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?
- Average
- Sum
- Count
- 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?
- A table relationship
- A calculated column
- A dynamic aggregation created using DAX
- 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?
- To create data models
- To publish, share, and collaborate on reports
- To clean data
- 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?
- They provide real-time insights
- They require coding knowledge
- They only work with Microsoft databases
- 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?
- Power Query
- Power View
- Power Pivot
- 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?
- Sorts data
- Filters data based on conditions
- Creates new tables
- 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?
- Data Masking
- Role-Based Security
- Data Classification
- 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?
- Bar Chart
- Pie Chart
- Gantt Chart
- 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?
- Returns values from related tables
- Filters data
- Joins tables
- 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?
- To display trends over time
- To compare multiple categories
- To track key performance indicators
- 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?
- Power Query
- Power Pivot
- Power View
- 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?
- .xlsx
- .pbix
- .csv
- .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?
- Pie Chart
- Bar Chart
- Line Chart
- 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?
- Hierarchical data
- A process with multiple stages
- Geographical data
- 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 GB
- 10 GB
- 100 MB
- 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?
- To generate automated reports
- To create relationships between tables
- To answer user queries using natural language
- 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?
- Filters data interactively
- Sorts data automatically
- Joins multiple tables
- 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?
- Performs aggregation on a column
- Applies filters to calculations
- Creates relationships between tables
- 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?
- Inner Join
- Left Outer Join
- Right Outer Join
- 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?
- Power View
- Power Query
- Power BI Report Builder
- 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?
- To create multiple reports
- To navigate from one report page to another with filtered data
- To group datasets
- 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?
- SQL
- Power Query M
- DAX
- 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?
- Once per day
- 8 times per day
- 48 times per day
- 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.
Advertisement
Advertisement