Six Degrees
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
In `chat_msgs`, a reply connects the person who sent it with the person they replied to. For each person, how many different people are they connected to, and what percentage of the chat's participants is that?
Summary
Every reply ties two names together. Find whose web reaches the furthest.
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