Top Pattern Matches
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
- L4
Interview Prompt
Our server logs contain messages with embedded reference numbers shaped like a 3-character code, a dash, and a run of digits after it. Find the 10 servers whose messages match that shape most often, returning server_name and how many of its messages matched.
Summary
A needle in a haystack, but how many haystacks?
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