SDE - Intern
Amazon
3 rounds | 5 Coding problems
1209 views
Interview preparation journey
Preparation
Duration: 4 months
Topics: Data Structures, OOPS, Algorithms, DBMS, OS, Networks
Tip

Tip 1 : Practice ds and algo
Tip 2 : Be confident
Tip 3 : Speak out loud and Be clear

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

Tip 1 : Mention only what you know
Tip 2 : Having Cp ranks is a plus

Interview rounds
01
Round
Easy
Online Coding Test
Duration2 hour 30 mins
Interview date15 Jun 2020
Problems2
Search in a row wise and column wise sorted matrix

You are given an N * N matrix of integers where each row and each column is sorted in increas...

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Problem approach

The idea is to remove a row or column in each comparison until an element is found. Start searching from the top-right corner of the matrix.

Clone Linked List with Random Pointer

Given a linked list having two pointers i...

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Problem approach

Insert a new node after every node with same value
Make a copy
Separate the two lists

02
Round
Medium
Video Call
Duration60 minutes
Interview date17 Jun 2020
Problems2
Return in Row wave form

You are given a 2D array with dimensions ‘N*M’. You need to read the array elements row-wise and return a linear array that st...

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Problem approach

If we make sure that all even positioned (at index 0, 2, 4, ..) elements are greater than their adjacent odd elements, we don’t need to worry about odd positioned element.

Construct a strict binary tree

You have been given an array/list of i...

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Problem approach

I used the properties of preorder
I used Recursion
I used HashMap for optimization

03
Round
Medium
Video Call
Duration60 minutes
Interview date17 Jun 2020
Problems1
Alien Dictionary.

You have been given a sorted (lexical order) dictionary of an alien language. Write a function that finds the order of characters in the alien...

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Problem approach

Create a graph
Traverse the two strings at a time, for forming an edge
Finally do Topological Sort

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