Pairwise Latency Maximum
A medium SQL mock interview question on DataDriven, with an AI interviewer who asks follow-up questions and a hire or no-hire decision at the end.
- Domain
- SQL
- Difficulty
- medium
- Seniority
- L3
Interview Prompt
We run a high-traffic API platform and want to see how call latencies compare head to head. Pair every call with every call, itself included, and for each pair return both call ids, both latencies and the larger of the two latencies.
Summary
Every pair compared.
How This Interview Works
- Read the vague prompt (just like a real interview)
- Ask clarifying questions to the AI interviewer
- Write and run your SQL against a real database
- Answer the interviewer's follow-up questions, then get a hire or no-hire decision