The File Size Profiler

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

Domain

Python

Difficulty

medium

Seniority

L3

Problem

Given entries (list of 'filepath size_bytes timestamp' strings), sum size_bytes per file extension (everything after the last '.' in the filename). Files without an extension (no '.' in basename) are grouped under the key 'no_ext'. Extension matching is case-insensitive, so 'report.CSV' counts toward 'csv'. Return a dict mapping each lowercased extension (or 'no_ext') to the total size in bytes.

Summary

File types and their disk footprint. One type dominates.

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