Peak Concurrent Batch Jobs
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
The scheduler team is sizing capacity by finding the worst pile-up. A job is running between its start and end time. Return the largest number of jobs that were running at the same instant, as a single number. If a job ends and another starts at the exact same time, treat the ending one as finishing first.
Summary
Jobs pile up. Find the moment the scheduler sweats the most.
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