Walmart | SDE 2 | 4+ YOE

I recently interviewed at Walmart for an SDE 2 position. The interview process consisted of four rounds.

Round 1: Coding (60 minutes)

• Right side view of Binary Tree
• Minimum Sum Subarray partition
• Kadane's theorem.

Round 2: Coding (60 minutes)

• Clone LL
• Define a Data Structure to store Key count at each timestamp with minimum put and get (I don't remember the exact question, but it was from a previous Walmart interview experience).

Round 3: Java (60 minutes) This round was focused on Java fundamentals. I was asked about debugging techniques, the Java memory model, multithreading, and I was asked to code a multithreaded program to print even and odd numbers sequentially.

Round 4: System Design (High-Level Design) This round started with a 30-minute discussion about a project I had worked on. In the remaining 30 minutes, I was asked to design a "Past Purchase Page" for an e-commerce website. The design should include the following features:

• Reflecting past purchases along with OrderId, Amount, and List of items.
• On click of any OrderId, display the Price distribution of each item.
• Search capability, if my past purchases have apples, you should revert back the list of OrderId's.
• Filter based on time.
• There was one more feature I am unable to recall.

Unfortunately, I was rejected in the System Design round.