Use a prefix sum to find the sum of the entire array [10, 20, 30, 40, 50] without re-summing
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
Use a prefix sum to find the sum of the entire array [10, 20, 30, 40, 50] without re-summing. Build the prefix array and use prefix[-1] for the total. Print the prefix array and the total.
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