Node Utilization
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
- L4
Interview Prompt
The capacity planning team is hunting for overloaded nodes against their regional baseline. In infra_nodes, compute the average cpu_pct per region (skipping NULL cpu_pct), then find nodes whose cpu_pct exceeds their own region's average. Within each region rank those nodes sorted from highest cpu_pct to lowest with ties sharing a position. Return the hostname, region, cpu_pct, regional average, and position.
Summary
Overloaded nodes hiding in busy regions. Spot the hot spots.
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