Microsoft Power BI Data Analyst (PL-300) — Practice Questions and Mock Exam

The PL-300 certification validates skills in preparing, modeling, visualizing, and analyzing data using Microsoft Power BI. It covers connecting to data sources, transforming data with Power Query, designing data models and DAX measures, creating interactive reports and dashboards, and managing workspaces and semantic models. Candidates must demonstrate proficiency in row-level security, scheduled semantic model refresh, and promoting or certifying Power BI content for enterprise use.

This certification is designed for data analysts who use Power BI to enable organizations to make data-driven decisions. Candidates should have experience with data preparation, data modeling, and visualization, along with proficiency in DAX, Power Query M, and Power BI Service for publishing and sharing reports with stakeholders.

Preparing, modeling, and visualizing data each land in the 25–30% range, splitting the exam almost evenly across the three stages of building a report — connecting and cleaning data, designing the model and DAX measures, then turning it into something readable. Managing and securing Power BI trails at 15–20%, covering workspaces, semantic models, and governance rather than report-building itself.

The even split across the first three domains means no single skill carries the exam: a candidate strong in DAX but weak in Power Query transformations, or comfortable building visuals but shaky on row-level security testing, will find each domain represented in roughly equal measure. Management and security is the smallest domain but not a rounding error — RLS and workspace configuration questions still make up close to a fifth of the exam.

The exam draws 40–60 questions from a mix of multiple-choice, multiple-select, drag-and-drop, and hot-area formats inside a 100-minute window. Most items present a data modeling, DAX, or visualization decision and ask which configuration solves it — a relationship's cross-filter direction, a measure's filter context, or which chart type fits a given dataset. Expect Power Query transformation and report-performance questions to test judgment about the fastest path, not merely a correct one.

Every domain of the PL-300 exam has enough questions in the pool to practice it in depth. A mock exam asks 50 questions in one sitting, on the same 100-minute clock as the real thing.

How long you'll need depends on how much hands-on experience you bring. The rest is set by the vendor: how the exam is delivered, how soon you can retake it, and how long the credential stays valid.

The exam runs through Pearson VUE, either online with a remote proctor or at an authorized testing center, and is offered in English, Japanese, Chinese, Korean, French, German, Spanish, and several other languages. Certification holds for one year, and Microsoft opens a free renewal assessment on Learn starting six months before it expires.

CALCULATE's filter-context behavior, iterator functions, and time-intelligence patterns only click after writing enough DAX to see how filters propagate through a model — that's a harder skill to test for than syntax recall, and the exam tests it anyway. Star-schema design and many-to-many relationships raise the same problem in modeling: cross-filter direction determines what a visual can and can't show, and the correct answer depends on the shape of the model, not a formula. Row-level security roles interact with workspace membership in ways that are easy to get backwards, and Import versus DirectQuery mode changes what an aggregation or the Performance Analyzer can fix.