'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 - 2
Amazon
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3 rounds | 4 Coding problems
Interview preparation journey
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Preparation
Duration: 8 months
Topics: Data Structures, hashmap, linked list, Pointers, OOPS, System Design, Algorithms, Dynamic Programming, array, 2-pointer problems
Tip
Tip

Tip 1 : practice on gfg and coding ninjas
Tip 2 : compete on codechef and codeforces
Tip 3 : learn DSA and practice regularly

Application process
Where: Campus
Eligibility: above 7 cgpa, no backlogs
Resume Tip
Resume tip

Tip 1 : put your entire valuable experience in brief
Tip 2 : put the handle of you competitive coding profiles
Tip 3 : try to put those things that really attracts the recruiter, will be better if your past experiences relates to the company

Interview rounds
01
Round
Medium
Online Coding Interview
Duration45 minutes
Interview date2 Feb 2021
Coding problem2

This round was scheduled in the evening hours and all the participants were required to fill a form which was shared 15 minutes prior to the start of the online coding round. This form was filled out probably for the security reasons and to ensure that no one disinterested participant gives the test.

1. Ways To Make Coin Change
Moderate
20m average time
80% success
0/80
Asked in companies
InfosysCiscoApple

You are given an infinite supply of coins of each of denominations D = {D0, D1, D2, D3, ...... Dn-1}. You need to figure out the total number ...

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2. Validate BST
Moderate
25m average time
0/80
Asked in companies
GrofersMakeMyTripPaypal

You have been given a binary tree of integers with N number of nodes. Your task is to check if that input tree is a BST (Binary Search Tree) or not.

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02
Round
Hard
Telephonic
Duration60 minutes
Interview date2 Mar 2021
Coding problem1

This round was on call where I was just supposed to answer the tech questions that were asked. It started with a brief interview with one another and then moved to questions on DBMS, operating systems, computer networks and all. Almost 20-25 questions were asked and I probably answered 90% of them correctly.

1. Reverse Linked List
Easy
15m average time
85% success
0/40
Asked in companies
Paytm (One97 Communications Limited)Hexaware TechnologiesSprinklr


Example:

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03
Round
Hard
HR Round
Duration30 minutes
Interview date20 Mar 2021
Coding problem1

There was only one interviewer for this round. He continuously interacted with me and was giving me some good situational problems that were not very easy to answer. Basically those were open-minded questions which can be answered oth ways and that's why I found it quiet hard as per my nature but at the end things went well for me.

1. Basic Puzzles

A noticeable aspect in this puzzles is the fact that there’s a circular misplacement, which implies if apple is wrongly labelled as Apple, Apple can’t be labelled as Orange, i.e., it has to be labeled as A+O. We are acquainted with the fact that everything is wrongly placed, which means A+O jar contains either Apple or Orange (but not both). The candidate picks one fruit from A+O, and let’s ass...

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Problem approach

Note: basically it's better if you have seen some puzzles before any HR round since they will give you an idea of what kind of problem you may encounter and then you can ace any difficult to difficult HR interview.

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