Show the mutable default argument bug: write a function add_to(item, bag=None) that safely creates a
A medium Python mock interview question on DataDriven. Practice with AI-powered feedback, real code execution, and a hire/no-hire decision.
- Domain
- Python
- Difficulty
- medium
Interview Prompt
Show the mutable default argument bug: write a function add_to(item, bag=None) that safely creates a new dict if bag is None. Call it twice with 'a' and 'b'. Print each result to show they are independent.
How This Interview Works
- Read the vague prompt (just like a real interview)
- Ask clarifying questions to the AI interviewer
- Write your python solution with real code execution
- Get instant feedback and a hire/no-hire decision