Microsoft Power BI Study Guide 2026
Everything you need to pass the Microsoft Power BI exam in one place: the exam format, every topic to study, real practice questions with explanations, flashcards, and full-length practice tests. Free, no sign-up needed.
📋 Microsoft Power BI Exam Format at a Glance
📚 Microsoft Power BI Topics to Study (26)
✍️ Sample Microsoft Power BI Questions & Answers
1. What is the benefit of marking a table as a Date table in the model?
Marking a date table ensures DAX time-intelligence functions work correctly.
2. What does the 'Group By' transformation in Power Query do?
Group By aggregates data by grouping rows with the same key column values and applying aggregation operations such as Sum, Count, Min, Max, or Average.
3. What does 'Query Folding' mean in Power Query?
Query Folding means Power Query translates transformation steps into native source queries (like SQL), so the source executes them instead of Power Query processing everything in memory.
4. What is a 'Query Dependency' in Power Query?
A Query Dependency exists when one Power Query query uses another as its source, creating a dependency chain visible in the Query Dependencies view.
5. What is a 'Workspace' in Power BI Service?
Workspaces are collaborative environments in Power BI Service where team members can share and manage reports, dashboards, datasets, and dataflows.
6. What do you use in Power BI to group your queries?
In Power BI, when you need to combine data from multiple tables or queries based on common columns, you use "Join Queries" (specifically, merge queries in Power Query Editor). This operation links rows from two tables, effectively grouping their data together into a single, more comprehensive query result. This is distinct from appending queries, which stacks rows from tables with identical column structures.