American Express interview experience Real time questions & tips from candidates to crack your interview

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American Express

3 rounds | 4 Coding problems

Sanchit Tanwar

Fresher | Aug 2019

Selected

Interview preparation journey

Preparation

Duration: 2 Months

Topics: Data structures and algorithms, Object-Oriented Programming System concepts, Database Management System, Operating System, Networking.

Tip

Do practice a lot of data structures questions as mostly questions in interviews are based on them. Also, do prepare for projects mentioned in your resume and skills which you have mentioned. Coding ninjas has a big hand in making my interview clear as I have taken a course from the coding Ninjas which helped me a lot to make my concepts clear.

Application process

Where: Other

Eligibility:

Resume tip

Keep it short and crisp. Go through it properly before the interview. Make sure that you haven't put anything in it that can cause you problems during the interview.

Interview rounds

Round

Easy

Face to Face

Duration30 minutes

Interview date20 Aug 2019

Coding problem2

It was in the day time. I was asked the programming language of my choice. It was mostly focused on programming fundamentals. I was asked 2 questions based on Data Structures and Algorithms.

1. Detect Loop

Moderate

15m average time

80% success

0/80

Asked in companies

Detect loop in a linked list.

Problem approach

First I told the interviewer, hashing approach to detect cycle then I moved to optimized solution that was through two pointers concept. The interviewer was satisfied with my approach.

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2. Intersection of Linked List

Easy

25m average time

73% success

0/40

Asked in companies

Given 2 linked lists which merge at some point. Find the node at which the lists merge.

Problem approach

First I suggested the brute force approach in which we check each element of the first linked list with each element of other linked list and then moved on to the better-optimized solution using linked list traversal based on the difference of lengths of both linked list.

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Round

Easy

Face to Face

Duration30 minutes

Interview date26 Aug 2019

Coding problem1

This round was mostly focused on my resume and projects.

1. Tell me about your projects.

Problem approach

I started explaining my projects through the objective and motive of the project. Then explained to him about the database schema and technology used in the project. Then I moved to the flow chart and explained to him the flow of each project.

Tip: Do prepare tech stack which is used by you in the project.

Round

Easy

Face to Face

Duration30 minutes

Interview date12 Sep 2019

Coding problem1

It was in the evening. I went to their office in Gurgaon. It was taken by one of the technology director who had a lot of experience.

1. I was asked questions related to how credit card business works which was related to working of company.

Problem approach

This was basically a company-related question and maybe they wanted to check if I've studied about the company. It was more of a conversational round and I answered the questions pretty confidently. And finally got the offer after this round.