Amazon Interview Experience | 218 (On-Campus)

Hii, Everyone this is my interview experience with amazon.

***First Round (1:30 hr)-

It consist of two sections

:- Mcq (20 questions)

:- Two coding questions



1) Given two string Str1 and Str2, Find whether any anagram of Str2 is a sub-string of string Str1 (Case Insensitive) then return True otherwise False.
Test case :if Str1 = Amazon and Str2 = omaz, Output: True

2) Given n non-negative integers representing buildings where the width of each bar is 1, compute how much water it is able to trap after raining
For example,
Given [0,1,0,2,1,0,1,3,2,1,2,1], return 6.

I solved 19 mcq and both coding questions.

***Second Round (F2F):(1:30hr)

1) Find LCA in BST.

2) Find LCA in Binary Tree.

3) Given a binary tree where each node contains three pointers left,right,succ, where succ pointer is pointing to any of its successor node , the question is if any of succ pointer is pointing to its predecessor node then make that pointer NULL.
4) Given an array that represents the runs scored by a batsman and we have given the total score ,now we have to find out in how many ways can batsman score the run.

Ex – arr = {2,3,1} total run = 4



2+1+1 = 4, 3+1 = 4, 2+2 = 4, 1+3 = 4, 2+1+1 = 4 and many more.

First I have given the recursive solution than interview asked me dp solution, I told him DP approach he was satisfied.

5) Find Loop in a linked list and remove it.
6) You have 100 songs to play in a shuffling mode how will you play.

Interview want full working code for each question for last question he wanted only approach.

***Third Round (F2F):(1 hr)

1) Given a source string and a destination string and a dictionary consisting of various words write a program to find minimum length path to travel from source to destination. Rules for traversing:
1. You can only change one character at a time
2. Any resulting word has to be a valid word from dictionary
Example: Given source word CAT and destination word DOG , one of the valid sequence would be
CAT -> COT -> DOT -> DOG
Another valid sequence can be
CAT -> COT – > COG -> DOG

One character can change at one time and every resulting word has be a valid word from dictionary
I told him a approach using graph.

2) What is hashing.

3) What is modular hashing.

4) How collisions can be handled.



5) Is semphore guarantee deadlock prevention.

*** Fourth Round (F2F) : (2 hr)

1) A kind of celebrity problem you have n person where one of them is celebrity
condition are all non-celeb person knows celebrity and celebrity can know few other persons and all non- celeb persons can know few of them among each other so you have to find celebrity.

2) Given a binary tree and two nodes print the path between the two nodes of binary tree.

3) Find Height of Binary Tree represented by Parent array

If you like GeeksforGeeks and would like to contribute, you can also write an article and mail your article to contribute@geeksforgeeks.org. See your article appearing on the GeeksforGeeks main page and help other Geeks.


Write your Interview Experience or mail it to contribute@geeksforgeeks.org

My Personal Notes arrow_drop_up
Article Tags :
Practice Tags :


Be the First to upvote.


Please write to us at contribute@geeksforgeeks.org to report any issue with the above content.