I applied through an employee referral. The process took 2 months. I interviewed at Walmart in Feb 2020
Interview
I had onsite interview with 3 groups from eCommerice team and one lunch interview.
In the first interview, he gave me an array and asked me to keep the largest number in the array in the first index whenever we add a new value to the array. (I was confused by this question because it was too easy and I didn't know whether this is what he wanted). Then he asked me to implement a heap using the array he gave me. Then he asked leetcode question, Word Search
Surprisingly easy-going for a big name like Walmart. The interview started with a simple coding challenge focused on detecting cycles in directed graphs. I felt pretty relaxed during the technical rounds, which were straightforward and conversational. The wild part was recognizing the question as a close variant of one I had practiced on PracHub just days earlier. It definitely boosted my confidence. Overall, I was impressed with the process and was thrilled to receive an offer, which I happily accepted.
Interview questions [1]
Question 1
Course Schedule (detect a cycle in a directed graph using topological sort / DFS)
First, standard short phone call with recruiter. Then a 1-hour interview with an engineer on the team, asked about technical experience and background, and did a live coding assessment via video call. Fairly standard Leetcode style questions
Intense but rewarding — the interview for the Software Engineer position at Walmart Labs was tougher than I anticipated. The technical rounds included an LRU Cache implementation question where I had to articulate my design thoughts on thread safety, followed by a complex system design for a real-time inventory service. What made a difference in my prep were the company-specific prompts I found on prachub.com; they really helped me understand the types of questions I might face. Despite the challenging nature of the interviews, I ultimately received an offer but chose to decline.