Quarters Apart
A hard 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
- hard
- Seniority
- L5
Interview Prompt
The platform team is reviewing how latency on the orders endpoint ('/api/v1/orders') has trended in the `api_calls` log. Over the twelve quarters of the three years before 2026, label each quarter like '2023-Q1' and show its average latency beside the previous quarter's average and the change between them.
Summary
Latency trending up or down? The quarters have the answer.
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