Most Efficient Region by Token Usage
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
Our API tokens carry an issued date, an expiration date, and a request count. For each region, compute the average token lifetime in days (expiration minus issuance), the average request count, and the ratio of average requests to average lifetime.
Summary
Some regions squeeze more out of every token.
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