Servers Returning to Origin

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

Every node in our fleet reports its region, its hostname and its CPU load. Count the regions where the node under the lightest CPU load and the node under the heaviest have the same hostname.

Summary

Servers that migrated back home.

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