Chain of Command
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
Every employee's `manager_id` points to their manager, except the CEO at the top, whose `manager_id` is `NULL`. For each employee, return their depth beneath the CEO and the full chain of names from the CEO down to them, formatted like a file path.
Summary
The tree runs deep. Trace every branch back to the top.
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