Walmart interview experience Real time questions & tips from candidates to crack your interview
SDE - 2
Walmart
4 rounds | 4 Coding
problems
Selected Interview preparation journey
Preparation
Duration: 6 Months
Topics: DSA, System Design, Design Patterns, JAVA, Database
Tip 1 : Prepare Well on DSA
Tip 2 : Focus on LLD and HLD Both
Application process
Where: Linkedin
Tip 1 : Don't make it too large, keep it short and crisp
Tip 2 : Highlight main skill sets and your projects
Interview rounds
01
Round
Medium
Face to Face
Duration40 minutes
Interview date5 Feb 2020
Coding problem1
Interviewer asked me to write program for mirror image of a binary tree.
1. Convert binary tree to mirror tree
Easy
15m average time
85% success
0/40
Asked in companies
Given a binary tree, convert this binary tree into its mirror tree.
A binary tree is a tree in which each parent node has at most two children.
Mirror of a Tree: Mirror of a Binary Tree T is another Binary Tree M(T) with left and right children of all non-leaf nodes interchanged.
Note:
1. Make in-place changes, that is, modify the nodes given a binary tree to get the required mirror tree.
Problem approach
I used Recursion for this.
02
Round
Medium
Face to Face
Duration40 minutes
Interview date5 Feb 2020
Coding problem1
It was a coding round. Only a single coding question was asked in this round.
1. Longest Substring Without Repeating Characters
Moderate
20m average time
80% success
0/80
Asked in companies
Given a string 'S' of length 'L', return the length of the longest substring without repeating characters.
Example:
Suppose given input is "abacb", then the length of the longest substring without repeating characters will be 3 ("acb").
Problem approach
I used Sliding Window Approach
03
Round
Medium
Face to Face
Duration40 minutes
Interview date5 Feb 2020
Coding problem1
It was a System Design Round
1. System Design
Design Ola/ Uber System Design
Problem approach
Tip 1 : I designed OLA system design on white board.
Tip 2 : Try to cover as many components as possible from business point of view and customer point of view.
04
Round
Easy
Face to Face
Duration30 minutes
Interview date5 Feb 2020
Coding problem1
It was a HR round
1. Basic HR Questions
- Tell me about yourself
- Explain the projects mentioned in your project.
- Have you done any internships? If yes, Explain the role you fulfilled there?
- Are you open to learn new tech skills or you prefer sticking to the previous ones?
- If you are team leader, and the team is not working as expected. How will you manage the team?
Problem approach
Tip 1 : If they asked for technology preference then tell your preference. If they asked to work on any technology say yes because after selection you mostly got your preferred technology and if anyone not get they also chance to work on preferred tech according to project req.
Tip 2 : Always put good points about company (eg. Flexibility, Environment, Learning, Growth etc)
Here's your problem of the day 
Solving this problem will increase your chance to get selected in this company
Skill covered: Programming
How do you remove whitespace from the start of a string?
Choose another skill to practice
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