The Running Total
An easy Python mock interview question on DataDriven, with an AI interviewer who asks follow-up questions and a hire or no-hire decision at the end.
- Domain
- Python
- Difficulty
- easy
- Seniority
- L3
Interview Prompt
We're reconciling a ledger of daily balance changes and want the account's balance after each day. Given the list of daily changes, return a list where each position holds the cumulative total through that day.
Summary
Each position holds the sum of everything before it.
How This Interview Works
- Read the vague prompt (just like a real interview)
- Ask clarifying questions to the AI interviewer
- Write and run your Python against test cases
- Answer the interviewer's follow-up questions, then get a hire or no-hire decision