Portfolio Profit Calculator
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
- Seniority
- L6
Interview Prompt
You are given prices, a dict mapping each date string to that day's price, and purchases, a list of [date, quantity] pairs (each quantity is an integer number of shares bought on that date). Let latest_price be the price at the chronologically latest date key in prices. Compute the total profit as the sum over every purchase of quantity * (latest_price - prices[date]), where prices[date] is the price paid on the purchase date. Return that total as a float. A positive result is profit; a negative result is a loss.
Summary
Portfolio gain from purchase history and current prices.
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