Power BI Advanced Features and DAX Questions

Focuses on advanced Power BI capabilities and deep proficiency in the DAX expression language and data modeling specific to Power BI. Includes writing and optimizing DAX measures and calculated columns using functions such as CALCULATE, FILTER, SUMX, and advanced time intelligence functions like DATEADD and year to date patterns. Covers data model optimization principles including star schema design, relationship management, and reducing cardinality for the VertiPaq engine. Addresses query folding, DirectQuery versus Import mode trade offs, incremental refresh configuration, row level security, query diagnostics and performance profiling, and techniques to tune DAX and model performance for large datasets.