'Coding has over 700 languages', '67% of programming jobs aren’t in the technology industry', 'Coding is behind almost everything that is powered by electricity'
American Express interview experience Real time questions & tips from candidates to crack your interview
Fullstack Developer
American Express
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4 rounds | 8 Coding problems
Interview preparation journey
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Preparation
Duration: 6 months
Topics: Data Structures, Algorithms, OOPS, OS, DBMS
Tip
Tip

Tip 1 : Be good at problem solving, accuracy and speed matters.
Tip 2 : Also prepare core CS subjects, OS, OOPS, DBMS.
Tip 3 : Be thorough with your resumé.

Application process
Where: Campus
Eligibility: Above 7 CGPA
Resume Tip
Resume tip

Tip 1 : Keep at least 2 great projects on resume.
Tip 2 : Try to include only tech-related information in resumé( for SDE roles).

Interview rounds
01
Round
Medium
Online Coding Interview
Duration90 minutes
Interview date19 Aug 2021
Coding problem3

The test happened at 9 PM, and the duration was of 90 mins. The test was held on Codility platform.

1. Reach the destination
Easy
15m average time
85% success
0/40
Asked in companies
HCL TechnologiesHSBCMakeMyTrip

Given a source point (sx, sy) and a destination point (dx, dy), the task is to check if it is possible to reach the destination point using the following valid moves:

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2. Circular Move
Easy
20m average time
80% success
0/40
Asked in companies
Paytm (One97 Communications Limited)American ExpressFlipkart

You have a robot currently standing at the origin (0, 0) of a two-dimensional grid and facing no...

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3. Buy and Sell Stock
Hard
0/120
Asked in companies
DirectiAtlassianSamsung R&D Institute

You are Harshad Mehta’s friend. He told you the price of a particular stock for the next ‘n’ days.


You are given an array ‘prices...

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02
Round
Easy
Video Call
Duration45 minutes
Interview date24 Aug 2021
Coding problem1

The timing for this round was around 10 AM. How to optimize website assets loading? Explain Hoisting in javascript.

1. Number Of Pairs With Given Sum
Moderate
39m average time
60% success
0/80
Asked in companies
American ExpressIntuitCognizant

You have been given an integer array/list(arr) and a number 'Sum'. Find and return the total number of pairs in the array/list which when added, results equal to the 'Sum'.

Note:
...
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03
Round
Easy
Online Coding Interview
Duration30 minutes
Interview date24 Aug 2021
Coding problem4

This was a problem solving round and consisted of puzzles and mathematical problems.

1. Puzzle

A man fell in a 50m deep well. He climbs 4 meters up and slips 3 meters down in one day. How many days would it take for him to come out of the well?

2. Puzzle

Suppose you take 5 mins to think for a coding task, another 10 mins to code where you write 100 lines of code. You take a break of 5 mins every 10 mins. How much lines of code will you have written at the end of 60mins.

3. Puzzle

There is a room with a door (closed) and three light bulbs. Outside the room, there are three switches, connected to the bulbs. You may manipulate the switches as you wish, but once you open the door you can’t change them. Identify each switch with its bulb. All bulbs are in working condition.

4. Puzzle

You are given Rs 100 every week. Every day you put Rs 5 in you piggy bank except on Sunday you put Rs 10. You take a bus to college, one side trip costs Rs 4, you do 2 trips a day. You have your lunch in college, at Rs 10 each day, except on Saturday, which costs Rs 25 that day. College runs from Monday to Saturday. Now you decide to buy your favourite book that costs Rs 100. How many day(s) wi...

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04
Round
Easy
Video Call
Duration30 minutes
Interview date24 Aug 2021
Coding problem0

This was more of a discussion round, where the interviewer asked me related to my internship. Situational based questions were asked related to work at AmEx.

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