'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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2 rounds | 4 Coding problems
Interview preparation journey
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Preparation
Duration: 7-8 months
Topics: Data Structures, Algorithms, Operating System, DBMS , OOPS
Tip
Tip

Tip 1 : Create a timetable and set goals. Keep aside 3-4 hours for studying. Consistency is the key.
Tip 2 : Do atleast 2 projects
Tip 3 : Know the complexities of the code that you’ve written.

Application process
Where: Campus
Eligibility: 65% in 12th
Resume Tip
Resume tip

Tip 1 : Do not put false things on resume.
Tip 2 : You should have good projects to showcase.

Interview rounds
01
Round
Medium
Online Coding Interview
Duration140 minutes
Interview date22 May 2020
Coding problem2

Timing: 7 pm

1. Minimum Cost to cross Grid
Moderate
30m average time
70% success
0/80
Asked in companies
AmazonMakeMyTripAmdocs
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Problem approach

I Used Dynamic Programming to solve it.

Try solving now
2. Sub Matrices With Sum Zero.
Moderate
15m average time
85% success
0/80
Asked in companies
GoogleMakeMyTripAmazon

You’re given a square matrix 'MAT' of order N. Your task is to find the number of non-empty sub-matrices such that the sum of all the elements inside the submatrix is zero.

NOTE:

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Problem approach

I used HashMap to solve it.

Try solving now
02
Round
Easy
Video Call
Duration90 minutes
Interview date11 Jun 2020
Coding problem2

Timing : 2 pm
The interviewer was very friendly.

1. Print boundary Values of the Binary Tree
Hard
20m average time
85% success
0/120
Asked in companies
MicrosofteBaySalesforce

You are given a binary tree having 'n' nodes.


The boundary nodes of a binary tree include the nodes from the left and right boundaries and the leaf nod...

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Problem approach

Step 1 : I first applied vertical traversal and store it in a hashmap and print boundary element of each value in the hashmap.
Step 2 : He asked me the time complexity and space complexity.
Step 3 : He asked to optimise the solution and gave some hints.
Step 4 : I wasn't able to think at that points but he was expecting something using recursion.

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2. Segregate even and odd nodes in a Linked List
Easy
15m average time
85% success
0/40
Asked in companies
AmazonOlaPaytm (One97 Communications Limited)

You are given the head node of a singly linked list 'head'. Your task is to modify the linked list in such a way that all the even valued nodes...

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Problem approach

Step 1 : I told him to create two linkedLists. One for odd elements and another for even elements. and while traversing the given list adding elements to even and odd lists respectively.
Step 2 : He asked me to optimise the space complexity.
Step 3 : I told him to change the list in place which will be taking O(1) complexity.

Try solving now
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