'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 - 1
Amazon
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4 rounds | 7 Coding problems
Interview preparation journey
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Journey
I was unaware of this coding stuff till my school life. I got to know about the field of computer science in my class 11th. I found it intresting and decided that I will pursue my career in the field of computer science. I took admission in B.Tech CSE and learned the various concepts like DSA and all.
Application story
I was practising DSA on a regular day when I saw a small advertisement kind of on Hackerearth. I opened it and I got to find that company is looking for some fresher graduates to serve as SDE-1. I applied to it and after the selection process, I was selected.
Why selected/rejected for the role?
I was giving correct explanation for my solutions in the coding round. I also built the optimal solution starting from the brute force algorithm which also added to my points.
Preparation
Duration: 12 months
Topics: Data Structures, OOPS, DBMS, Algorithms, Dynamic Programming
Tip
Tip

Tip 1 : Participate in live contests on websites like CodeStudio as much as possible.
Tip 2 : Practice previous interview questions from CodeStudio.
Tip 3 : Revise Computer Science subjects like DBMS, OOPS thoroughly.

Application process
Where: Hackerearth
Eligibility: Above 6 CGPA
Resume Tip
Resume tip

Tip 1 : Try to list only those projects in your resume regarding which you're comfortable talking in depth.
Tip 2 : Always be honest about whatever you mention in your resume.
Tip 3 : Keep it 1 pager.
Tip 4 : Don't add your picture in the resume, instead use that space to put something more useful.

Interview rounds
01
Round
Medium
Online Coding Interview
Duration90 minutes
Interview date3 Jul 2020
Coding problem1
1. Pythagorean Triplets
Moderate
35m average time
70% success
0/80
Asked in companies
OYOFlipkartAmazon

You are given an array of n integers (a1, a2,....,an), you need to find if the array contains a pythagorean triplet or not.

An array is sai...

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Problem approach

1. Sorted the array.
2. Took all the pairs and performed binary Search / Put all the pair sum in a Hashmap and checked each index individually for that sum.

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02
Round
Medium
Face to Face
Duration60 minutes
Interview date10 Jul 2020
Coding problem2
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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2. Optimal Ordering Of Tasks
Moderate
15m average time
85% success
0/80
Asked in companies
AmazonalibabaRoyal Bank of Scotland

For eg - Wear Socks then Wear Shoes Brush before Wear Socks 

Output - Brush Wear Socks Wear Shoes

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03
Round
Medium
Face to Face
Duration60 minutes
Interview date10 Jul 2020
Coding problem2
1. Next smaller Palindrome
Easy
10m average time
85% success
0/40
Asked in companies
SalesforceDunzoBig Basket

You are given a number 'N' in the form of a string 'S', which is a palindrome. You need to find the greatest number strictly less than 'N' which is also a palindrome.

Note:
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2. Kth Largest Element In A Stream
Moderate
30m average time
65% success
0/80
Asked in companies
JP MorganWells FargoAmazon

You will be given a stream of numbers, and you need to find the 'kth' largest number in the stream at any given time.


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04
Round
Medium
Face to Face
Duration60 minutes
Interview date10 Jul 2020
Coding problem2
1. Trapping Rain Water
Moderate
15m average time
80% success
0/80
Asked in companies
Paytm (One97 Communications Limited)AtlassianJP Morgan

You have been given a long type array/list 'arr’ of size 'n’.


It represents an elevation map wherein 'arr[i]’ denotes the elevation ...

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2. Number of Atoms
Moderate
50m average time
0/80
Asked in company
Amazon

Given a string, representing a chemical formula, return the count of each atom.

An atomic element always starts with an uppercase character, then zero or more lowercase lette...

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