American Express Interview Questions for a full-time job as an Analyst, Data Science, Credit & Fraud Risk.

Process * *– Resume shortlisting followed by two rounds of interviews.

## Interview Process

**First Round**

- Please Introduce yourself.
- A detailed discussion about my role and projects in my current organization.
- What was the problem statement? How did the model help in solving them?
- Which modeling techniques did you try?
- What were the final variables in the model and how were they related to the dependent variable?
- Difference between linear regression and logistic regression?
- Do you know about Tree-based algorithms?
- Suppose you have a categorical independent variable with 4 categories, say, a,b,c,d. In this case, how is the split decision made by a GBM? Does a GBM try all the possible combinations of splits?
- 2 puzzles –

How will you measure 7 minutes using two buckets which take 4 minutes and 5 minutes to fill completely? Assume an unlimited supply of water.

Suppose you have two ropes that are non-uniform. And each rope takes exactly 60 seconds to burn. How will you measure 15 seconds using them?

- A guesstimate

Estimate the number of cyclists in your nearby area on a Sunday evening.

- Do you know about Amex’s business model?
- Can you tell me the revenue sources of American Express?
- Do you know about Amex’s competitors? How is American Express different from them?
- How much will you rate yourself in Python and SQL on a scale of 1-10 with 1 being the lowest and 10 being the highest score?
- Do you have any questions for me?

**Second Round**

- Please introduce yourself.
- Briefly explain your role at your current organization. What does your team do?
- Detailed discussion on my project. How did you tune the hyperparameters?
- Why do you want to switch your role?
- How comfortable are you with the fitting of Boosting algorithms?
- Do you know how a GBM fitting happens? Can you explain the fitting algorithm step by step?
- Which ML techniques are you familiar with?
- Can you explain the revenue streams of Amex?
- Can you list down the major costs incurred by Amex?

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