Walmart Interview Experience for SDE-3 Backend Developer
I am currently working at Walmart as a Backend Developer. I will be sharing my whole experience of Interviews at Walmart in detail.
I received a call for the interview through Linkedin and the recruiter asked me if I can give the interview on the coming weekend 7th November 2020, but since I wasn’t confident enough I requested her to consider me for the next drives which were supposed to happen on 28th Nov 2020.
On the 28 of November, I appeared for the Interview and the whole process except Salary Negotiation got finished the same day. I had to go through total 3 rounds which are as follows:
Round 1(DS Algo and Problem Solving): The interviewer started the interview with his introduction and asked me to give my introduction as well after that he moved on to ask the following questions
- Given an array of elements of length N, ranging from 0 to N – 1. All elements may not be present in the array. If the element is not present then there will be -1 present in the array. Rearrange the array such that A[i] = i and if i is not present, display -1 at that place.”
- Write Code to Link Left Nodes of the Binary Tree to its immediate Right Sibling
Since in the introduction I mentioned that I love to play chess at last he just asked my to approach to solve N Queens problem.
Round 2(Language Proficiency in Java):
- Implement Queue using Stack (Working Code).
- Explain the Internal working of HashMap in java.
- Your app is receiving data in patches of 100, which data structure Array List or LinkedList will you be using to store and why?
- Explain the difference between Singleton and Static?
Since I was able to answer all the questions I easily. qualified for this round as well and was asked to appear in the final Round which was Hiring Manager
Round 3(Hiring Manager Round): This round was the lengthiest round of all as the Hiring manager along with other questions asked me design questions as well and the discussion had to be long.
- Design an online Music Application like Prime Music or Spotify
Following were his expectations
- Requirements
- Come up with Different Components
- Write APIs (REST)
- Write code to print Zig-Zag traversal of Binary Tree.
- Draw and Explain the architecture Diagram of your current project
- What is the most complex problem you have encountered and solved in your career span now?
- Apart from the assigned work, what else have you done voluntarily in your company’s project or outside.
And finally, he wrapped up the interview by asking if I have any questions for him!
Result: After all these Rounds I got the confirmation on the next working day that I have been selected and send all the required documents for further processing, However, the salary negotiation took a long time and I got my offer letter around 21 days later.
Finally, I joined Walmart and currently working in it. I hope this experience will helpful for people who are preparing or going to appear for the interview.
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