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Top Data Analyst Interview Questions & Answers (2026)
Data Analyst interviews evaluate your SQL querying proficiency, business acumen, statistical thinking, and ability to translate numbers into compelling visual stories.
Interview Pipeline:
3 Rounds (SQL Live Test, Business Case Study, Behavioral Interview)
Core Evaluation:
SQL Window Functions, Data Modeling, Metric Definition, Stakeholder Communication
Interview Questions & Model STAR Responses
Sample STAR Answer:
All three are SQL window ranking functions used with `OVER (PARTITION BY ... ORDER BY ...)`. `ROW_NUMBER()` assigns a unique sequential integer to every row regardless of duplicate values. `RANK()` assigns identical ranks to ties, but skips subsequent rank numbers (e.g., 1, 2, 2, 4). `DENSE_RANK()` also gives identical ranks to ties, but does NOT skip any numbers (e.g., 1, 2, 2, 3).
Key Points to Cover
- How each function handles duplicate/tied rows
- Provide clear numerical sequence examples (1, 2, 2, 4 vs 1, 2, 2, 3)
- Real-world use case: finding the Nth highest salary or top 3 transactions per user
Common Pitfalls
- Mixing up RANK and DENSE_RANK gap handling
Salary Negotiation Pro-Tip for Data Analysts
Highlight your quantifiable business contributions in past roles (e.g., "Uncovered a ₹40L revenue leakage in billing data") as leverage for top-of-bracket compensation.