The Usual Suspects

A hard SQL interview practice problem on DataDriven. Write and execute real sql code with instant feedback.

Domain

SQL

Difficulty

hard

Seniority

L4

Problem

We run health-check monitoring across several cloud regions, and every region has one service that dominates the check volume. For 2025, find that leading service in each region with its check count, and include any services tied at the top of a region.

Summary

Same services, same checks, same problems.

Practice This Problem

Solve this SQL problem with real code execution. DataDriven runs your SQL queries against a real database and checks it automatically.