Users With and Without Ad Clicks
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
- L4
Interview Prompt
Account reviews keep asserting that suspended and inactive accounts never engage with ads, yet nobody has checked that claim against the whole `users` base. For the growth team, split users within each account status by whether they have ever clicked an ad in `ad_impressions`, with the number of users in each group.
Summary
Clicked an ad versus never clicked. The split.
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