The Seventh Day
A medium 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
- medium
- Seniority
- L4
Interview Prompt
A growth team measures how well each monthly signup cohort sticks around. For each signup month, report how many users joined, how many of them came back to view a page a week or more after signing up, and that return count as a percentage of the month's signups.
Summary
Day one was promising. Day seven tells the truth.
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