Data Quality Report

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

Domain

Python

Difficulty

hard

Problem

A data quality report on a batch of records needs per-column null and non-null counts. Return a dict mapping each column name to a dict with 'null_count' and 'non_null_count' keys.

Practice This Problem

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