Where the Bill Settles
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
We're reviewing spend across our US regions, where every cloud charge sits as one row in `cloud_costs` tagged with its service and the amount billed. A handful of enormous bills drag the average up, so for each service we track the median charge instead; return the five services with the highest median.
Summary
When a handful of giant charges skew the average, the middle 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