Cost Density Extremes
A medium SQL mock interview question on DataDriven. Practice with AI-powered feedback, real code execution, and a hire/no-hire decision.
- Domain
- SQL
- Difficulty
- medium
- Seniority
- L4
Interview Prompt
Cost density is total cost divided by the number of services in that region, rounded to the nearest integer. Show region, provider, and density for only the minimum and maximum density regions.
Summary
Some regions pack more cost per node than others.
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