Complete, exam-focused prep for Microsoft's Power BI Data Analyst certification (PL-300). Covers all four skill areas: preparing the data (connecting to sources, Import vs DirectQuery vs composite models, and cleaning/shaping with Power Query including profiling, unpivot, append and merge); modeling the data (star-schema design, relationships and cross-filter direction, DAX measures vs calculated columns, CALCULATE and filter context, time intelligence, and hierarchies); visualizing and analyzing (choosing the right visual, slicers and filters, drill-through and bookmarks, and AI visuals like Key influencers, Q&A and the decomposition tree); and managing and securing Power BI (workspaces and apps, deployment pipelines, row-level security including dynamic RLS with USERPRINCIPALNAME(), scheduled and incremental refresh, the on-premises data gateway, and sensitivity labels). Includes exam-trap callouts, per-area mastery checks, a 50-question mock, a full-length 125-question exam simulator, and a spaced-repetition flashcard deck. PL-300 is roughly 40-60 questions in about 100 minutes; passing is 700 on a 1000-point scale. Practice hands-on in Power BI Desktop and the service.
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