A is correct: DirectQuery enables Power BI to query the underlying data source in real time, which is essential for displaying up-to-date contact center metrics.
B is correct: Import mode is optimal for historical data analysis as it improves performance and allows scheduled refreshes without impacting operational systems.
C is incorrect: Calculated columns are computed during data refresh and stored in the model, which is less efficient for large datasets compared to measures or transformations in Power Query.
D is correct: The Q&A feature enhances usability by allowing supervisors to interact with data via natural language, improving accessibility and decision-making.
E is incorrect: While embedding reports is possible, neglecting performance considerations like data volume and refresh strategy can degrade user experience.
F is correct: Dataflows enable ETL processes in Power BI service, consolidating and cleaning data prior to reporting, which is critical for accurate analytics.