Build a prefix sum array from [3, 1, 4, 1, 5]
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
Build a prefix sum array from [3, 1, 4, 1, 5]. Start with [0] and append running totals. Print the prefix array. Then compute the range sum from index 1 to 3 using prefix[j+1] - prefix[i] and print it.
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