Chain of Command
A hard SQL mock interview question on DataDriven, with an AI interviewer who asks follow-up questions and a hire or no-hire decision at the end.
- Domain
- SQL
- Difficulty
- hard
- Seniority
- L5
Interview Prompt
Every employee's `manager_id` points to their manager's `employee_id`, except the CEO, whose `manager_id` is `NULL`. Return each employee with their depth beneath the CEO and the full chain of names from the CEO down, joined by / 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 and run your SQL against a real database
- Answer the interviewer's follow-up questions, then get a hire or no-hire decision