Net Lines
An easy 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
- easy
- Seniority
- L3
Interview Prompt
The commit log, `repo_commits`, holds one row per commit with the repository it landed in and the lines it added and removed. What is each repository's net line growth, lines added minus lines removed?
Summary
Some authors build. Others trim. The net 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