Greeting Formatter Class
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
- L3
Interview Prompt
Implement a class `MessageFormatter(text)` with a method `sort_by_case()` that returns `text` rearranged so all lowercase letters come first (in their original relative order), followed by all uppercase letters (in their original relative order), followed by all non-letter characters (digits, spaces, punctuation) in their original relative order. For example, `MessageFormatter('hElLo').sort_by_case()` returns `'hloEL'`. Then implement a top-level driver function `sort_by_case(text)` that constructs `MessageFormatter(text)`, calls its method, and returns the resulting string. The driver is the entry point that is graded: given a single string argument it returns the reordered string.
Summary
First impressions are formatted carefully.
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