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Amazon Interview | Set 4

  • Difficulty Level : Medium
  • Last Updated : 13 Jun, 2019

Please find the details of my Amazon interviews below.

Date of Interviews: 1 Sept 2012

Become a success story instead of just reading about them. Prepare for coding interviews at Amazon and other top product-based companies with our Amazon Test Series. Includes topic-wise practice questions on all important DSA topics along with 10 practice contests of 2 hours each. Designed by industry experts that will surely help you practice and sharpen your programming skills. Wait no more, start your preparation today!

No of Rounds: 4

Type of Interviews: Walk-in for 1 yr experienced





Round 1:

Question 1:- Given a 2D array containing only 0/1’s and each row is in sorted order. Find the row which contains maximum number of 1s.
I was asked to code. Algo which I told was I will search position of first 1 in 1st row using binary search. And mark it. Now note that position check in 2nd row. If there is 1 for that position already found in 1st row, then binary search from 0 to that position else move to row number 3. Similarly continue further.



Round 2:-

Question 1:- Given a Binary tree and two nodes. Need to find the minimum ancestor, no parent nodes given.
Each time when I told answer, they modified question little bit or removed some extra storage which I was taking.

Question 2:- Given a Binary tree and two nodes. Need to find smallest path between them



Round 3:-

Question 1:- Given an array of infinite size containing 0/1 only and in sorted order, find position of first one.

My answer: first check whether 1 is present at 100th position or not if there, do binary search between 0 and 100 else check 1 is there at 200th position, and similarly continue further.

Question 2:- Given life time of different elephants find period when maximum number of elephants lived. ex [5, 10], [6, 15], [2, 7] etc. year in which max no elephants exists.

Other questions were regarding Operating system like virtual memory etc.



Round 4:-
It was HR round. Questions related to project. Questions like why I should Hire you etc were asked.

Result is still on wait.

This article is compiled by Naveen Kumar Singh. 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.

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