Quality Gate

A easy Python interview practice problem on DataDriven. Write and execute real python code with instant grading.

Domain

Python

Difficulty

easy

Seniority

L3

Problem

A sensor rig streams a batch of `readings`, and quality control needs the position of the first reading that slips out of spec, where in spec means strictly above zero. Return that index, or -1 when every reading passes and when the batch is empty.

Summary

Not everything passes inspection.

Practice This Problem

Solve this Python problem with real code execution. DataDriven runs your Python code in a real environment and grades it automatically.