How do I approach Analytics & Experimentation interview questions?

Analytics & Experimentation questions require understanding of core concepts and practice. PracHub provides solutions with explanations to help you master analytics & experimentation interviews.

What difficulty level is this interview question?

This is a easy difficulty Analytics & Experimentation question, commonly asked during Technical Screen rounds at Affirm.

What role is this question designed for?

This question is commonly asked for Data Scientist candidates at Affirm during technical interviews.

Calculate Profit of 4-Month Loan at 30% APR

Last updated: Mar 29, 2026

Quick Overview

This question evaluates a data scientist's understanding of basic financial mathematics, specifically the application of simple interest and annual percentage rate to a short-term loan.

Affirm

Aug 4, 2025, 10:55 AM

Data Scientist

Technical Screen

Analytics & Experimentation

Credit Risk — Short-term Personal Loan Profitability

Context

You are evaluating the profit on a simple-interest personal loan. Assume no compounding, inflation, opportunity cost, fees, defaults, or servicing expenses. The principal remains outstanding for the full term and is repaid at maturity.

Question

What is the profit on a 4-month loan with principal $1,000 and a 30% APR under these assumptions?

Solution

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