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SDE - Intern
Amazon
2 rounds | 2 Coding
problems
Selected Interview preparation journey
Preparation
Duration: 7 months
Topics: Data Structure Algorithms, OOOPS, GRAPHS, DP
Tip 1 : Code Properly, and do more and more practice on DSA
Tip 2 : Understand the concept behind the problem
Tip 3 : Be confident
Application process
Where: Campus
Eligibility: CSE, IT, ECE, EE above 5 cpi
Tip 1 : Write only topics on which you are confident
Tip 2 : Write important stuff only and try to make one page resume only.
Interview rounds
01
Round
Medium
Online Coding Interview
Duration135 mins
Interview date10 Oct 2020
Coding problem0
This round had 4 section
1.Debugging(7 question in which probelm were specified and wrong code was given to us . We had to change the code and make it to right code)
2. Coding (2 Coding question Easy Medium level)
3. Logical aptitude(25 mcq question were there which was based on aptitude , Coding, English)
4. work style (Around 50 Question were there which was like based on work style , Leadership principle based)
Timing : 10AM
Environment was very good
02
Round
Medium
Video Call
Duration80 minutes
Interview date15 Dec 2020
Coding problem2
This was Online interview
this is one and only interview which was based on totally DSA (Problem Solving Skills)
which was held on AMAZE CHIME
Timing : 12pm
Environment was very good
1. Reverse Linked List
Easy
15m average time
85% success
0/40
Asked in companies
You are given a Singly Linked List of integers. You need to reverse the Linked List by changing the links between nodes.
Note :
You do not need to print anything, just return the head of the reversed linked list.
2. The Celebrity Problem
Moderate
30m average time
60% success
0/80
Asked in companies
There are ‘N’ people at a party. Each person has been assigned a unique id between 0 to 'N' - 1(both inclusive). A celebrity is a person who is known to everyone but does not know anyone at the party.
Given a helper function ‘knows(A, B)’, It will returns "true" if the person having id ‘A’ know the person having id ‘B’ in the party, "false" otherwise. Your task is to find out the celebrity at the party. Print the id of the celebrity, if there is no celebrity at the party then print -1.
Note:
1. The helper function ‘knows’ is already implemented for you.
2. ‘knows(A, B)’ returns "false", if A doesn't know B.
3. You should not implement helper function ‘knows’, or speculate about its implementation.
4. You should minimize the number of calls to function ‘knows(A, B)’.
5. There are at least 2 people at the party.
6. At most one celebrity will exist.
Problem approach
:
Here's your problem of the day 
Solving this problem will increase your chance to get selected in this company
Skill covered: Programming
How do you remove whitespace from the start of a string?
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