Loading interview...

The Code Expander

A easy Python mock interview question on DataDriven. Practice with AI-powered feedback, real code execution, and a hire/no-hire decision.

Domain
Python
Difficulty
easy
Seniority
junior, mid

Interview Prompt

A data compression utility stores strings in run-length encoded format and needs a decoder for downstream processing. Write a function that takes a run-length encoded string like '3a2b4c' and returns the decoded string. Numbers can be multi-digit.

How This Interview Works

  1. Read the vague prompt (just like a real interview)
  2. Ask clarifying questions to the AI interviewer
  3. Write your python solution with real code execution
  4. Get instant feedback and a hire/no-hire decision