🔥 Power BI Scenario-Based Interview Q&A (Must Practice)

Crack interviews by thinking like a data analyst, not just a tool user 👇

📊 Q1. Your dashboard is taking too long to load. How would you optimize it?

👉 Remove unused columns & tables
👉 Prefer measures over calculated columns
👉 Optimize relationships (avoid many-to-many if possible)
👉 Reduce visuals & use aggregations
👉 Switch to Import mode if feasible

📊 Q2. Business wants a dynamic Top N filter (e.g., Top 5 / Top 10 products). How will you build it?

👉 Create a parameter table (Top N values)
👉 Use DAX with RANKX / TOPN
👉 Apply it in visual-level filters
👉 Connect parameter with slicer for dynamic control

📊 Q3. Different users should only see their own region’s data. What’s your approach?

👉 Implement Row-Level Security (RLS)
👉 Create roles based on region
👉 Map users to roles in Power BI Service

📊 Q4. You need to compare current sales with last year. How would you do it?

👉 Create a date table (important!)
👉 Use DAX like SAMEPERIODLASTYEAR
👉 Build measures for current vs previous year
👉 Visualize using line/bar charts

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