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Bottom 2% Services by Spend

A hard SQL mock interview question on DataDriven. Practice with AI-powered feedback, real code execution, and a hire/no-hire decision.

Domain
SQL
Difficulty
hard
Seniority
mid

Interview Prompt

FinOps is hunting for zombie services that cost almost nothing but still consume billing line items. Identify the bottom 2% of services by total cloud spend in May 2026 by bucketing them into 50 equal-sized percentile groups and returning those in the lowest bucket. Show the service name and total spend, from lowest up.

How This Interview Works

  1. Read the vague prompt (just like a real interview)
  2. Ask clarifying questions to the AI interviewer
  3. Write your sql solution with real code execution
  4. Get instant feedback and a hire/no-hire decision