SWE3 at Walmart

How it went

What they would tell you

How to prepare

Their background

Round by round

1. 1

   DSA Round60 min

   This round was a pure test of core problem-solving skills Question 1: Maximum Width of Binary Tree A Breadth-First Search problem, solved by applying a unique indexing strategy to nodes, to calculate the distance between the leftmost and rightmost non-null nodes at each level Question 2: Sum of Maximums of Every Window of Size K, this is classic sliding window problem

   • Maximum Width of Binary Tree
   • Sum of Maximums of Every Window of Size K
2. 2

   Low Level Design Round60 min

   Starting with intro then interviewer asked to Design similar system like Airbnb

   • API Design: Clear, RESTful endpoints.

   • DB Design: Core tables like Users, Properties, Bookings, Amenities, etc., including necessary indexes and relationships.

   • Core Functionalities: Handling search (based on location, dates, filters), booking/reservation flow, and payment integration. Java Questions

   • Java collections questions differences between ArrayList, LinkedList, HashSet

   • HashMap internal implementation how hashing, collisions, and resizing work

3. 3

   Managerial Round60 min

   Famous Managerial Questions

   • Tell me about a time you had a conflict with a teammate/manager.

   • What is your biggest failure/mistake, and what did you learn?

   • Why Walmart? Scenario-Based Questions

   • A project is running late. How do you handle it?

   • You disagree with the proposed technical direction. What do you do?

What came up