Cache Efficiency
A hard SQL mock interview question on DataDriven. Practice with AI-powered feedback, real code execution, and a hire/no-hire decision.
- Domain
- SQL
- Difficulty
- hard
- Seniority
- L5
Interview Prompt
The infrastructure team wants each edge location compared to the global baseline. For each edge, show its request count, its local cache-hit percentage, and the overall cache-hit percentage across all edges repeated on every row for easy comparison.
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 your sql solution with real code execution
- Get instant feedback and a hire/no-hire decision