5 Frequently asked Interview Questions for Power BI
5️⃣ MOST Commonly Asked Power BI interview questions with brief answers📊:
1️⃣. How can you optimize the performance of a large Power BI report with complex visuals?
👉Ans: To optimize performance, you can use techniques like summarising data before importing, reducing the number of visuals, using appropriate visuals, optimising DAX calculations, & enabling query folding.
2️⃣. Explain the importance of relationships in Power BI.
👉Ans: Relationships define how tables in a data model are related. They are crucial for creating meaningful visuals & enabling features like slicers and cross-filtering.
3️⃣. How do you handle complex time intelligence calculations in DAX for irregular or non-standard fiscal calendars?
👉Ans: Handling complex fiscal calendars involves using DAX functions like TOTALYTD, SAMEPERIODLASTYEAR, & custom DAX calculations that consider fiscal year variations & irregular periods.
4️⃣. What is a Data Model in Power BI?
👉Ans: A data model is a collection of tables & relationships that enable data analysis in Power BI.
5️⃣. Explain the difference between calculated columns & measures.
👉Ans: Calculated columns are computed at the data model level, while measures are calculated on the fly in visualizations.
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Aditi Gupta
Analytics Mentor
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