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Walmart Lab Interview Experience | Set 12 (On-Campus)

  • Difficulty Level : Hard
  • Last Updated : 10 Jun, 2019

Round 1:
500 selected were selected for online test and cgpa criteria was 7.0 cgpa.
Online Test.

The online test was conducted on HackerEarth. Three questions were asked and we were given 90 minutes to solve three questions.

1.Count number of inversion in an array in less than O(n^2) time complexity.

2. Given two strings s1 and s2, where s2 is a palindrome, how many substrings(s2) are there if we are allowed to arrange s1 in any order.

3. Check if a string is valid or not. A string is valid if on removing two different characters at a time, you are left string of same character. If the string is empty it is not valid. If the string is valid print the remaining character.

Around 20 of 500 students were selected for interviews.

Technical Interview Round 2:

This was my first technical interview. The Duration of the interview was about 1 hour.

1. Given a vector of strings. He gave another string and asked to print all the anagrams in the order in which they appeared in the vector.

2. Spiral order traversal of binary tree.

We had a lot of discussion about my internship and the part of project I did.

Technical Interview Round 3:
This was second technical round. Duration about 40-45 mins.

1.Mirror of binary tree.

2. Given an array A, find all triples (a,b,c) such that a+b+c=S where S is given sum.

3.Reverse linked list in batches of k.

Technical Interview Round 4:
1. Ugly numbers( DP solution ).

Discussion on my project and internships.

HR Interview : Round 5:
This was HR round. Duration about 30 mins.

1. Tell me something about yourself.
2. Discussion about internship.
3. My future plans and what I have done to achieve them.

At last 7 students were selected for 6 months internship and 2 students were selected for 6 months internship+ full-time job in Bangalore.

The interview experience was quite good and they focused on all the core computer science subjects. Geeks for geeks was a lot of help to me as it helped me in my placement preparation and provided almost all content that was necessary for placement preparation.

This article is contributed by Arpit Kathuria, If you like GeeksforGeeks and would like to contribute, you can also write an article using or mail your article to 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, AmazonGoogle and Microsoft Test Serieses.

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