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Amazon Interview Experience | Set 410 (On-Campus Internship)

  • Difficulty Level : Hard
  • Last Updated : 24 Jun, 2021

Online Round: 
It consists of 20 MCQs and two coding questions and MCQs got the negative marking . One for the correct answer and -0.25 for each wrong answer. 
 

  1. Given a string. Find all the palindromic partitions of the string. (Number of way the string can be partitioned so that all the partitions are palindrome) ( Case–Insensitive ) 
    Examples: 
     
Input : NITIN 
Output : 3

Input : AAa
Output : 4
  1.  
  2. You are given with a large paragraph and N words.You have to find a min length subparagraph of the paragraph which contain all those N words in any order.(Case Insensitive)

Only 32 students got selected for Personal Interviews Rounds. 

Round 2(Technical Interview I): 
First the Interviewer introduced himself and then asked me to introduce yourself. 

He asked me 3 questions related to Data Structures and Algorithms. 
 

  1. Given a n-ary tree print all the possible paths of the tree. 

    Firstly I gave him the approach using queues.  Then he asked me to optimize the code for space complexity of O(1). Then I gave him the approach using recursion and a long in depth discussion followed on it. Then he asked me to write the code.

  2. Given the no. of stairs as the input and a person can step forward either 1 or 2 or 3 steps at a time. Find the total no of possible ways person can climb the stairs. 
     
Input : 3
Output: 4
  1. Solution: GeeksforGeeks Link 
     
  2. Given a 1-D array having equal no even and odd numbers. Arrange the numbers in such a way that all the even no get the even index and odd no get the odd index. Required space complexity and time complexity was O(1). 
    Solution: GeeksforGeeks Link

Only six students were selected for the next round. 



Round 3(Technical Interview II): 
This round was similar to the previous rounds. Firstly the Interviewer introduced himself and then asked me to introduce yourself. 

He asked me 2 questions related to Data Structures. 
 

  1. Print all the continuous sub-arrays where the sum of the sub-array becomes zero. Required space complexity was O(n).
  2. Given a string containing parenthesis. Find the total no of reversal of parenthesis to make the given output as balanced one. This question followed a detailed discussion and interviewer gave me different no of inputs to test the code. 
    Solution: GeeksforGeeks Link

After the coding questions. he asked me some basic questions related to Operating Systems like Deadlocks and Semaphores. 

At last 3 students got the internship offer from Amazon. 

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

Please write comments if you find anything incorrect, or you want to share more information about the topic discussed above.
 

Attention reader! Don’t stop learning now. Get hold of all the important DSA concepts with the DSA Self Paced Course at a student-friendly price and become industry ready. To complete your preparation from learning a language to DS Algo and many more, please refer Complete Interview Preparation Course. In case you are prepared, test your skills using TCS, Wipro, Amazon. GoogleE-Litmus and Microsoft Test Serieses.

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