The Weight of the Cloud

A medium 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
medium
Seniority
L4

Interview Prompt

The 2026 close takes its bills from `cloud_costs`, and finance weights each one by every allocation in `cost_allocs` booked against the same service. Report each calendar quarter's total weighted spend.

Summary

Not every dollar counts the same. Close the quarter.

How This Interview Works

  1. Read the vague prompt (just like a real interview)
  2. Ask clarifying questions to the AI interviewer
  3. Write and run your SQL against a real database
  4. Answer the interviewer's follow-up questions, then get a hire or no-hire decision