Cache Efficiency
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 infrastructure team wants each edge location compared to the global baseline. Show every edge's request count and local cache-hit percentage, with the overall cache-hit percentage across all edges repeated on every row.
Summary
Some edges run hot. Others coast on the global average.
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