Selling Where Nobody Lives
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
The logistics team noticed orders shipping to broad regions (orders.region, e.g. 'EU', 'APAC') that don't line up with any country we have on file for customers (customers.country). Count the number of distinct order regions that do NOT appear as any customer's country. Return a single number as cross_region_count.
Summary
Shipments land in regions our customer list has never heard of.
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