First Contact

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

Domain

SQL

Difficulty

medium

Seniority

L3

Problem

The performance team is measuring first-impression latency: the first time each user hits a given endpoint, how long that call took. For every endpoint, report the average of those first-contact latencies, slowest endpoints first.

Summary

Every user's first hello to an endpoint. Timed.

Practice This Problem

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