SQL questions from Wipro data engineering interviews.
These sql questions are sourced from Wipro data engineering interviews. Each includes an expert-level answer. This set leans toward the medium-difficulty band most real interviews actually live in (5 of 6). Recurring themes are partition, window, and spark — these patterns appear most often in real interviews and reward the deepest preparation. Many of these questions also surface at Capco and Impetus, so the preparation transfers across companies. Average answer is around 1 minute of reading — plan roughly 1 hour to work through the full set thoughtfully.
This collection contains 6 curated questions: 1 easy, 5 medium. There's a strong foundation of fundamentals-focused questions — ideal for building confidence before tackling advanced topics.
The most frequently tested areas in this set are partition (4), window (3), spark (1), and join (1). Focusing on these topics will give you the highest return on your preparation time.
Start with the easy questions to warm up and solidify fundamentals. Medium-difficulty questions form the bulk of real interviews — spend the most time here and practice explaining your reasoning out loud. For each question, try answering before revealing the solution. Use our AI Mock Interview to simulate real interview conditions and get instant feedback on your responses.
Demonstrate the difference between DENSE_RANK() and RANK()
Write a query to find the top three highest-paid employees in each department using window functions.
Can you describe a project where you handled large volumes of data?
Demonstrate how to use a LEFT JOIN to combine data from two tables and handle null values.
How do you handle negotiations if your expected salary isn't met?
How would you retrieve the first and last order for each customer from a sales table?
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