The Company You Keep
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
- L5
Interview Prompt
On our experimentation platform we only care about users who share an experiment with at least one other user. For each Friday, count how many sessions those users ran, listed from the earliest date.
Summary
Only experiments with a crowd count. Find the Friday sessions they drove.
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