Walmart | SDE III | | June '24 | Offer

I was contacted by a recruiter on LinkedIn for a Software Development Engineer III position at Walmart.

Round 1: DSA

1. Bottom view of Binary Tree
2. Minimum Number of Days to Make m Bouquets (Leetcode)

I was able to solve both questions within an hour with passing test cases.

Round 2: JAVA

1. JAVA interfaces and their applications.
2. Difference between interfaces and abstract classes. When to use both of them?
3. Singleton classes and their uses
4. Double check locking pattern and its implementation
5. SOLID principles with examples
6. I was asked to code a multithreading problem in an IDE on my local machine. The problem was to write a program that creates three threads (T1, T2, T3) and each thread should run sequentially so that the output is like: T1:1 T2:2 T3:3 ... T1:10

After completing this, the interviewer asked me to make the code scalable for 'n' threads.

Round 3: Hiring Manager

1. Discussion on my current projects, highlighting key points and improvements I made to existing features.
2. Several situational and behavioral questions.
3. Discussion about the agile practices I follow at my current organization and how I contribute to them.
4. The interviewer asked me to draw a high-level diagram of how messaging queues work.
5. What design problems do I see in my current project?
6. What is the most interesting problem I have solved recently and how did I solve it?

The hiring manager round lasted for an hour and included more similar questions.

Verdict: I was selected for the position.