Power BI 778 Cheat Sheet 2026
The 30 highest-yield Power BI 778 facts, distilled from real exam questions. Print it, save it as a PDF, or study it here — free, no sign-up.
Power BI 778 exam key facts
- Microsoft says most of its certification exams, including role-based associate exams such as PL-300, typically contain 40 to 60 questions, though the number can vary. Source
- Candidates get 100 minutes to complete Microsoft Exam PL-300: Microsoft Power BI Data Analyst. Source
- Candidates need a score of 700 or higher to pass Microsoft Exam PL-300: Microsoft Power BI Data Analyst. Source
- The price of Microsoft Exam PL-300 depends on the country or region where the exam is proctored. Source
45 questions
120 min time limit
70.00% to pass
- What is the Power BI REST API used for? → Programmatically managing Power BI resources like workspaces, datasets, and reports
- Which Power BI storage mode loads all data into the in-memory VertiPaq engine for the fastest query performance? → Import
- What is required to enable Scheduled Refresh for an on-premises data source in Power BI? → An on-premises data gateway
- What are the three workspace roles in Power BI Service? → Admin, Member, Contributor, Viewer
- What does the EARLIER function do in DAX? → References an outer row context in a nested row context iteration
- What is a common performance drawback of excessive bidirectional cross-filtering in a Power BI data model? → It can create ambiguous filter paths, leading to slower queries and unexpected results
- Which Power BI feature enables governance by allowing admins to enforce policies on workspace creation and sharing? → Power BI Admin Portal
- Which data type in Power Query stores whole numbers without decimal places? → Whole Number
- What is the difference between SUM and SUMX in DAX? → SUM works on columns; SUMX iterates a table row by row
- Which DAX function creates a virtual table by filtering an existing table based on a condition? → FILTER
- What is the purpose of a 'decomposition tree' visual in Power BI? → Interactively breaking down a measure across multiple dimensions
- What is the purpose of a 'Parameter' in Power Query? → A variable value that can be used dynamically within query steps
- What is query folding in Power Query? → Pushing transformation steps back to the data source to execute natively
- What is a calculated column in Power BI? → A column computed during query refresh using DAX
- What does the USERELATIONSHIP function do in DAX? → Activates an inactive relationship for use within a CALCULATE expression
- For Power BI, you'll need to make a customized visualization. What do you think should be the first thing you install? → Node.js
- What is Power Query used for in Power BI? → Connecting to data sources and transforming data before loading
- What does a slicer do in Power BI? → Provides an on-canvas filter that lets report users interactively filter visuals
- What does 'row-level security (RLS)' enforce in Power BI Service? → Restricts data visibility so users only see rows they are permitted to access
- In Power BI, what is a 'role-playing dimension'? → A single dimension table used multiple times with different relationships
- What is a 'dataflow' in Power BI? → A reusable set of Power Query transformations stored in the Power BI Service
- What does the Power BI Admin Portal allow tenant administrators to manage? → Tenant-wide settings, user permissions, audit logs, and feature controls
- In Power BI, which relationship filter direction allows filters to propagate in both directions between two tables? → Bidirectional
- What language do Power Query transformations use behind the scenes? → M (Power Query Formula Language)
- Which Power BI feature allows you to navigate from a summary visual to a detail report page? → Drill-through
- What Power BI feature partitions historical data and refreshes only the most recent portion, reducing refresh duration for large datasets? → Incremental refresh
- What is the default storage mode for tables in Power BI Desktop? → Import
- What does 'deployment pipelines' in Power BI help you manage? → CI/CD workflows for promoting Power BI content from development to test to production
- What is the purpose of the 'Viewer' role in a Power BI workspace? → Can view and interact with reports and dashboards but cannot edit or publish
- What happens when you set a query's load setting to 'Enable Load' off in Power Query? → The query runs but its results are not loaded into the data model
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What Practice Test Geeks adds beyond an AI chat for Power BI 778
An AI chatbot can quiz you, but it can't reproduce the exam conditions or keep your record. Here you get:
- A timed, full-length Power BI 778 mock exam — 45 questions in 120 minutes with a 70% pass mark, modeled on the official exam's question count and time limit, followed by a score report broken down by exam domain.
- A fixed Power BI 778 question bank: the same test every attempt, so your score is comparable from one try to the next instead of changing with every regenerated quiz.
- Progress saved on your device: completed tests, scores and missed questions stay in My Progress, so you can retake only what you got wrong.
- Power BI 778 flashcards built from the same question bank.
- Free Power BI 778 practice tests with the correct answer shown after each question.
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How this page was made: written with AI tools and published by Nathan Beja, founder of Practice Test Geeks, who is responsible for its content. Exam facts are checked against the official sources listed below. Not reviewed by a subject-matter expert. Editorial policy
Sources & references
Exam facts on this page (fees, format, dates, passing scores) are checked against these official sources; the date is our last check. Editorial policy
- learn.microsoft.com — Renewal, retake fee, passing score, exam format, test delivery, fees, time limit, exam information · verified Oct 2026