'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'
Amazon interview experience Real time questions & tips from candidates to crack your interview
SDE - Intern
Amazon
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3 rounds | 6 Coding problems
Interview preparation journey
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Preparation
Duration: 3 Months
Topics: Arrays, Binary Search, Strings, Bit Manipulation, Linked Lists, Stacks And Queues, Tree Data Structure, Heaps And Maps, Dynamic Programming, Greedy Algorithm, Graph Data Structure & Algorithms
Tip
Tip

Tip 1 : Practice Company specific DS Algo questions from LeetCode, GFG, Interviewbit, Coding Ninjas etc.
Tip 2 : Take mock interviews with your friends to gain confidence.
Tip 3 : Try Solving Questions on Notepad as in interview IDE will not be provided.

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

Tip 1 : Write things in resume like projects, experience and skills which you can explain and defend clearly.
Tip 2 : Add links of your various online platforms profiles like Codechef, Codeforces etc. if you are active on these platforms.

Interview rounds
01
Round
Medium
Online Coding Interview
Duration150
Interview date29 Sep 2020
Coding problem2

The test was on AMCAT platform.
The test was of 2.5 hours , web-proctored and switching between tabs was not allowed.

Test consist of 4 sections:

1 Debug section which had 7 questions to correct/write the code. (20min)
2 Coding section having 2 questions. (70 min)
3 Logical Reasoning section. (35 min)
4 Workstyle assessment. (20 min)

1. Search in a row wise and column wise sorted matrix
Moderate
15m average time
80% success
0/80
Asked in companies
DirectiZomatoPaytm (One97 Communications Limited)

You are given an 'N * N' matrix of integers where each row and each column is sorted in increasing order. You are given a target integer 'X'.


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2. Subtree of Another Tree
Easy
10m average time
90% success
0/40
Asked in companies
Thought WorksInfo Edge India (Naukri.com)GE (General Electric)

Given two binary trees T and S, check whether tree S has exactly the same structure and node values with a subtree of T, i.e., check if tree S is a subtree of the tree T.

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02
Round
Hard
Video Call
Duration60
Interview date18 Nov 2020
Coding problem2

Interview was conducted on Amazon Chime platform and for coding, link was shared on which I had to code.
Two questions were given to me and requested to solve in the desired time. 
Interviewer was friendly and supportive.

1. Reachable Nodes
Easy
10m average time
90% success
0/40
Asked in companies
AmazonDirecti

You are given a graph with ‘N’ nodes and ‘M’ unidirectional edges. Your task is to find the number of nodes reachable from node ‘i’, where 0 <= ‘i’ <= ‘N’ - 1.

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2. Squares of a Sorted Array
Easy
15m average time
85% success
0/40
Asked in companies
Natwest GroupAdobeCognizant

You are given an array/list ‘ARR’ of ‘N’ integers. You have to generate an array/list containing squares of each number in ‘ARR’, sorted in increasing order.

For example :

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03
Round
Medium
Video Call
Duration45
Interview date18 Nov 2020
Coding problem2

Interview was conducted on Amazon Chime platform and for coding, link was shared on which I had to code.
Three questions were given to me and requested to solve in the desired time. 
Interviewer was friendly and supportive.

1. Valid String
Moderate
18m average time
85% success
0/80
Asked in companies
SalesforcePaytm (One97 Communications Limited)Expedia Group

You have been given a string 'S' containing only three types of characters, i.e. '(', ')' and '*'.

A Valid String is defined as follows:

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2. Convert a binary tree to its sum tree
Easy
15m average time
85% success
0/40
Asked in companies
Samsung R&D InstituteWalmartCisco

Given a binary tree of integers, you are supposed to modify the given binary tree to a sum tree where each node value is replaced by the sum of ...

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