Question 1

What is the recommended schema for better performance in Power BI data models?

Accepted Answer

Star schema

Answer

Snowflake schema

Answer

Hierarchical schema

Answer

Flat schema

Question 2

Why is it important to use Power Query for data cleaning and transformation before loading data into Power BI?

Accepted Answer

To ensure data is clean and optimized for analysis

Answer

To create more complex calculations

Answer

To reduce the need for data relationships

Answer

To increase the data load time

Question 3

How can you avoid complex calculations in your Power BI data model?

Accepted Answer

Use calculated columns and measures wisely

Answer

Use complex DAX functions

Answer

Increase data load frequency

Answer

Use more tables

Question 4

Which practice can help maintain proper relationships between tables in Power BI?

Accepted Answer

Ensuring keys and referential integrity

Answer

Adding more foreign keys

Answer

Using random keys

Answer

Avoiding primary keys

Question 5

What should you do to optimize the performance of your Power BI model?

Accepted Answer

Reduce the number of visuals and simplify them

Answer

Use complex and detailed visuals

Answer

Add more calculated columns

Answer

Increase the number of visuals

Question 6

Why is it beneficial to utilize aggregations and summarizations in Power BI?

Accepted Answer

To handle large datasets efficiently

Answer

To decrease data accuracy

Answer

To increase data redundancy

Answer

To avoid using relationships

Question 7

What is a key step to take regularly to maintain an optimized Power BI data model?

Accepted Answer

Review and clean up unused fields, tables, and relationships

Answer

Increase the number of relationships

Answer

Add more fields and tables

Answer

Decrease the number of calculated columns

Question 8

How should you handle DAX functions for creating measures in Power BI?

Accepted Answer

Use them effectively to create optimized measures

Answer

Avoid using DAX functions

Answer

Use DAX functions for all calculations

Answer

Ignore performance considerations

Question 9

What is one of the initial steps to take when simplifying your Power BI data model?

Accepted Answer

Focus on essential tables and fields only

Answer

Use complex and detailed tables

Answer

Avoid using primary keys

Answer

Add as many tables and fields as possible

Question 10

What continuous action should be taken to ensure the performance of a Power BI model is optimized?

Accepted Answer

Monitor performance and make adjustments as necessary

Answer

Increase the number of visuals

Answer

Add more data regularly

Answer

Avoid reviewing performance metrics