Upload Button Icon Add office photos

Walmart

Compare button icon Compare button icon Compare

Filter interviews by

Walmart Software Engineer III Interview Questions and Answers for Experienced

Updated 31 May 2025

11 Interview questions

A Software Engineer III was asked 1mo ago
Q. Implement a Hashmap in Java.
Ans. 

A HashMap in Java stores key-value pairs for efficient data retrieval using hashing.

  • Use an array of buckets to store entries: Each bucket can handle collisions using linked lists.

  • Implement methods like put(key, value), get(key), and remove(key).

  • Example of put: hashmap.put('key1', 'value1');

  • Example of get: String value = hashmap.get('key1');

  • Handle resizing when load factor exceeds a threshold (e.g., 0.75).

A Software Engineer III was asked 6mo ago
Q. Given n non-negative integers representing an elevation map where the width of each bar is 1, compute how much water it can trap after raining.
Ans. 

Calculate the amount of water that can be trapped between bars after rainfall using heights of bars.

  • Use two pointers to traverse the array from both ends towards the center.

  • Maintain two variables to track the maximum height from the left and right.

  • At each step, calculate trapped water based on the minimum of the two maximum heights.

  • Example: For heights [0,1,0,2,1,0,1,3,2,1,2,1], the trapped water is 6.

Software Engineer III Interview Questions Asked at Other Companies for Experienced

Q1. Given k floors and n eggs, find the highest floor from which if a ... read more
asked in UST
Q2. =>What is garbage collection in c# =>What is dispose and fi ... read more
Q3. Explain object-oriented concepts and design in detail.
Q4. 1. Explain about CORS? 2. Explain about REST API Versioning 3. Co ... read more
asked in Walmart
Q5. Describe microservices and their communication patterns. How were ... read more
A Software Engineer III was asked
Q. Design a parking lot.
Ans. 

Design a parking lot system

  • Consider the size and layout of the parking lot

  • Include features like ticketing system, payment options, and security measures

  • Implement a system to track available parking spaces and manage vehicle entry/exit

A Software Engineer III was asked
Q. Given a binary tree, remove all leaf nodes from the tree. A leaf node is a node that has no children. Return the root of the modified tree.
Ans. 

Remove leaf nodes of a tree

  • Traverse the tree in postorder fashion

  • For each node, check if it is a leaf node (both children are null)

  • If it is a leaf node, remove it by setting its parent's reference to null

A Software Engineer III was asked
Q. Can you implement polyfills for map and filter functions?
Ans. 

Implementing polyfills for map and filter functions in JavaScript to enhance array manipulation capabilities.

  • Polyfill for map: Creates a new array by applying a function to each element. Example: arr.map(x => x * 2).

  • Polyfill for filter: Creates a new array with elements that pass a test. Example: arr.filter(x => x > 10).

  • Use 'this' context in polyfills to maintain the correct scope. Example: arr.map(functi...

A Software Engineer III was asked
Q. Implement a Lodash _.get polyfill.
Ans. 

Lodash's `get` method retrieves values from objects using a path, with optional default values.

  • Lodash's `get` function allows safe access to nested object properties.

  • Syntax: `_.get(object, path, [defaultValue])`.

  • Example: `_.get({ a: { b: 2 } }, 'a.b')` returns `2`.

  • If the path doesn't exist, it returns `undefined` or a specified default value.

  • Example: `_.get({ a: { b: 2 } }, 'a.c', 'default')` returns `'default'.

A Software Engineer III was asked
Q. Describe microservices and their communication patterns. How were they implemented in your project, and why?
Ans. 

Microservices are implemented using RESTful APIs and message brokers for asynchronous communication.

  • RESTful APIs are used for synchronous communication between microservices.

  • Message brokers like Kafka or RabbitMQ are used for asynchronous communication.

  • Microservices communicate with each other using HTTP requests and responses.

  • Each microservice has its own database and communicates with other microservices through...

Are these interview questions helpful?
A Software Engineer III was asked
Q. Which design pattern do you follow and why? Can you provide an example?
Ans. 

I follow the MVC design pattern as it separates concerns and promotes code reusability.

  • MVC separates the application into Model, View, and Controller components.

  • Model represents the data and business logic.

  • View represents the user interface.

  • Controller handles user input and updates the model and view accordingly.

  • MVC promotes code reusability and maintainability.

  • Example: Ruby on Rails framework follows MVC pattern.

A Software Engineer III was asked
Q. Design a garbage collector similar to the Java Garbage Collector with minimal configurations.
Ans. 

Design a Java-like Garbage Collector with minimal configurations.

  • Choose a garbage collection algorithm (e.g. mark-and-sweep, copying, generational)

  • Determine the heap size and divide it into regions (e.g. young, old, permanent)

  • Implement a root set to keep track of live objects

  • Set thresholds for garbage collection (e.g. occupancy, time)

  • Implement the garbage collection algorithm and test for memory leaks

A Software Engineer III was asked
Q. What is memoization, also write polyfill of memoize
Ans. 

Memoization is a technique used in programming to store the results of expensive function calls and return the cached result when the same inputs occur again.

  • Memoization helps improve the performance of a function by caching its results.

  • It is commonly used in dynamic programming to optimize recursive algorithms.

  • Example: Memoizing a Fibonacci function to avoid redundant calculations.

Walmart Software Engineer III Interview Experiences for Experienced

15 interviews found

Interview experience
5
Excellent
Difficulty level
Moderate
Process Duration
Less than 2 weeks
Result
Selected Selected

I applied via Naukri.com and was interviewed in Jul 2024. There were 3 interview rounds.

Round 1 - One-on-one 

(2 Questions)

  • Q1. DSA: Trapping Rain Water Leeetcode
  • Ans. 

    Calculate the amount of water that can be trapped between bars after rainfall using heights of bars.

    • Use two pointers to traverse the array from both ends towards the center.

    • Maintain two variables to track the maximum height from the left and right.

    • At each step, calculate trapped water based on the minimum of the two maximum heights.

    • Example: For heights [0,1,0,2,1,0,1,3,2,1,2,1], the trapped water is 6.

  • Answered by AI
  • Q2. Dynamic Programming Question
Round 2 - One-on-one 

(2 Questions)

  • Q1. Java Basics - Stack vs heap memory, Advanced java concepts, Design patterns
  • Q2. Spring Boot, JPA, Bean lifecycle, Stereotypes, Multithreading, String pool
Round 3 - One-on-one 

(2 Questions)

  • Q1. Resume projects, Caching
  • Q2. Kafka

Interview Preparation Tips

Topics to prepare for Walmart Software Engineer III interview:
  • Java
  • Spring Boot
  • DSA
Interview preparation tips for other job seekers - Focus more on Java & Srping Boot concepts
Interview experience
5
Excellent
Difficulty level
Moderate
Process Duration
Less than 2 weeks
Result
Selected Selected

I applied via Approached by Company and was interviewed in Mar 2024. There were 5 interview rounds.

Round 1 - Technical 

(1 Question)

  • Q1. Interviewer asked two leetcode medium question and asked to solve on leetcode itself. Approach as well as optimization of the solution. Lasted around 1 hr.
Round 2 - Technical 

(1 Question)

  • Q1. Oops concepts, aws, Multithreading. One question related to custom sorting. Had to sort list of string using custom English alphabet. Then further asked to modify it in O(1) time complexity. Interviewer wa...
Round 3 - Behavioral 

(1 Question)

  • Q1. Segment was divided into two sections one for technical and one for non-technical. Lasted around 1.5 hr
Round 4 - HR 

(1 Question)

  • Q1. Talked about basic hr questions like why walmart, why the swich and so on. Explained about walmart. Lasted around 15 min.
Round 5 - Salary discussion 

(1 Question)

  • Q1. Walked me through the salary breakup. And no negotiation was there as they were pretty rigid about their offer and said with this you also get to work with such a big brand

Interview Preparation Tips

Interview preparation tips for other job seekers - Prepare DSA, projects and oops concepts.
Be confident and back your answers.
Interview experience
3
Average
Difficulty level
Moderate
Process Duration
Less than 2 weeks
Result
No response

I applied via Recruitment Consulltant and was interviewed in Feb 2024. There was 1 interview round.

Round 1 - Technical 

(2 Questions)

  • Q1. What is memoization, also write polyfill of memoize
  • Ans. 

    Memoization is a technique used in programming to store the results of expensive function calls and return the cached result when the same inputs occur again.

    • Memoization helps improve the performance of a function by caching its results.

    • It is commonly used in dynamic programming to optimize recursive algorithms.

    • Example: Memoizing a Fibonacci function to avoid redundant calculations.

  • Answered by AI
  • Q2. What is Promise also write polyfill for Promise
  • Ans. 

    A Promise is an object representing the eventual completion or failure of an asynchronous operation.

    • A Promise is used to handle asynchronous operations in JavaScript.

    • It represents a value that may be available now, or in the future.

    • A polyfill for Promise can be implemented using the setTimeout function to simulate asynchronous behavior.

  • Answered by AI

Interview Preparation Tips

Topics to prepare for Walmart Software Engineer III interview:
  • Javascript
  • React.Js
Interview preparation tips for other job seekers - Practise hard on core concepts and their internal working

Skills evaluated in this interview

Interview experience
5
Excellent
Difficulty level
Moderate
Process Duration
Less than 2 weeks
Result
Not Selected

I applied via LinkedIn and was interviewed in Oct 2022. There were 3 interview rounds.

Round 1 - Resume Shortlist 
Pro Tip by AmbitionBox:
Keep your resume crisp and to the point. A recruiter looks at your resume for an average of 6 seconds, make sure to leave the best impression.
View all tips
Round 2 - One-on-one 

(1 Question)

  • Q1. 1. Introduce yourself 2. Talk about nature of current work 3. One medium question from leetcode related to dynamic programming- similar to knapsack problem 4. Why do you want ro change your job?
Round 3 - One-on-one 

(1 Question)

  • Q1. 1. Core Java concepts 2. Nature of work at current work place and design patterns used 3. One medium problem on the tougher side related to matrix

Interview Preparation Tips

Interview preparation tips for other job seekers - The interview went smoothly. The DS problems can be answered through paced leet code preparation.
The interviewers are very friendly.
Learn core Java concepts with clarity.
Be ready to give examples for the concepts.

Software Engineer III Interview Questions & Answers

user image Mohd Adil Sheikh

posted on 31 May 2025

Interview experience
3
Average
Difficulty level
Moderate
Process Duration
Less than 2 weeks
Result
Selected Selected

I appeared for an interview before May 2024, where I was asked the following questions.

  • Q1. Implement Hashmap in Java
  • Ans. 

    A HashMap in Java stores key-value pairs for efficient data retrieval using hashing.

    • Use an array of buckets to store entries: Each bucket can handle collisions using linked lists.

    • Implement methods like put(key, value), get(key), and remove(key).

    • Example of put: hashmap.put('key1', 'value1');

    • Example of get: String value = hashmap.get('key1');

    • Handle resizing when load factor exceeds a threshold (e.g., 0.75).

  • Answered by AI
  • Q2. You are given a list of songs, you need to play the songs in shuffle such that no song gets repeated twice until all the songs are played. Do it in O(1) space complexity and O(n) time complete

Software Engineer III Interview Questions & Answers

user image Athang Kulkarni

posted on 21 May 2024

Interview experience
5
Excellent
Difficulty level
Moderate
Process Duration
Less than 2 weeks
Result
Selected Selected

I appeared for an interview before May 2023.

Round 1 - Technical 

(2 Questions)

  • Q1. Leetcode Cache Question
  • Q2. Remove Leaf Nodes of Tree
  • Ans. 

    Remove leaf nodes of a tree

    • Traverse the tree in postorder fashion

    • For each node, check if it is a leaf node (both children are null)

    • If it is a leaf node, remove it by setting its parent's reference to null

  • Answered by AI
Round 2 - Technical 

(2 Questions)

  • Q1. Java Basics Questions
  • Q2. Design Parking Lot
  • Ans. 

    Design a parking lot system

    • Consider the size and layout of the parking lot

    • Include features like ticketing system, payment options, and security measures

    • Implement a system to track available parking spaces and manage vehicle entry/exit

  • Answered by AI

Skills evaluated in this interview

Interview experience
3
Average
Difficulty level
-
Process Duration
4-6 weeks
Result
Selected Selected

I applied via Approached by Company and was interviewed before Mar 2023. There were 3 interview rounds.

Round 1 - Coding Test 

Applied for front end engineer

Two sum
Find element in Matrix m*m changed to Find m*n on flow
Adding two linked list

Round 2 - One-on-one 

(4 Questions)

  • Q1. React js production grade login and dash board
  • Q2. Flat polly fill
  • Q3. Lodash get polly fill
  • Ans. 

    Lodash's `get` method retrieves values from objects using a path, with optional default values.

    • Lodash's `get` function allows safe access to nested object properties.

    • Syntax: `_.get(object, path, [defaultValue])`.

    • Example: `_.get({ a: { b: 2 } }, 'a.b')` returns `2`.

    • If the path doesn't exist, it returns `undefined` or a specified default value.

    • Example: `_.get({ a: { b: 2 } }, 'a.c', 'default')` returns `'default'.

  • Answered by AI
  • Q4. Map and filter poly fill
  • Ans. 

    Implementing polyfills for map and filter functions in JavaScript to enhance array manipulation capabilities.

    • Polyfill for map: Creates a new array by applying a function to each element. Example: arr.map(x => x * 2).

    • Polyfill for filter: Creates a new array with elements that pass a test. Example: arr.filter(x => x > 10).

    • Use 'this' context in polyfills to maintain the correct scope. Example: arr.map(function(x)...

  • Answered by AI
Round 3 - Technical 

(1 Question)

  • Q1. Hiring manager design related questions
Interview experience
3
Average
Difficulty level
Moderate
Process Duration
Less than 2 weeks
Result
Selected Selected

I applied via Job Portal and was interviewed before Apr 2023. There was 1 interview round.

Round 1 - Technical 

(1 Question)

  • Q1. There are 3 technical rounds

Interview Preparation Tips

Interview preparation tips for other job seekers - Practice leetcode medium level questions
Interview experience
4
Good
Difficulty level
Moderate
Process Duration
Less than 2 weeks
Result
Selected Selected

I applied via Approached by Company and was interviewed before Feb 2023. There was 1 interview round.

Round 1 - Technical 

(1 Question)

  • Q1. Coding problems, Spring, DSA
Interview experience
5
Excellent
Difficulty level
Moderate
Process Duration
4-6 weeks
Result
Selected Selected

I applied via Referral and was interviewed before Nov 2022. There were 4 interview rounds.

Round 1 - Resume Shortlist 
Pro Tip by AmbitionBox:
Don’t add your photo or details such as gender, age, and address in your resume. These details do not add any value.
View all tips
Round 2 - Coding Test 

Data structures and algorithms, leetcode medium level.

Round 3 - Coding Test 

Java with data structures and algorithms round

Round 4 - HR 

(1 Question)

  • Q1. Basic hr questions

Top trending discussions

View All
Interview Tips & Stories
2w
toobluntforu
·
works at
Cvent
Can speak English, can’t deliver in interviews
I feel like I can't speak fluently during interviews. I do know english well and use it daily to communicate, but the moment I'm in an interview, I just get stuck. since it's not my first language, I struggle to express what I actually feel. I know the answer in my head, but I just can’t deliver it properly at that moment. Please guide me
Got a question about Walmart?
Ask anonymously on communities.

Walmart Interview FAQs

How many rounds are there in Walmart Software Engineer III interview for experienced candidates?
Walmart interview process for experienced candidates usually has 2-3 rounds. The most common rounds in the Walmart interview process for experienced candidates are Technical, One-on-one Round and Coding Test.
How to prepare for Walmart Software Engineer III interview for experienced candidates?
Go through your CV in detail and study all the technologies mentioned in your CV. Prepare at least two technologies or languages in depth if you are appearing for a technical interview at Walmart. The most common topics and skills that interviewers at Walmart expect are Information Technology, SQL, Monitoring, Data Structures and Networking.
What are the top questions asked in Walmart Software Engineer III interview for experienced candidates?

Some of the top questions asked at the Walmart Software Engineer III interview for experienced candidates -

  1. Microservices and their communication patterns. How is it implemented in your p...read more
  2. Which design pattern you follow and why? Show some examp...read more
  3. Design a Garbage collector similar to Java Garbage Collector with minimum confi...read more
How long is the Walmart Software Engineer III interview process?

The duration of Walmart Software Engineer III interview process can vary, but typically it takes about less than 2 weeks to complete.

Tell us how to improve this page.

Overall Interview Experience Rating

4.1/5

based on 10 interview experiences

Difficulty level

Moderate 100%

Duration

Less than 2 weeks 80%
4-6 weeks 20%
View more

Interview Questions from Similar Companies

Reliance Retail Interview Questions
3.9
 • 1.7k Interviews
DMart Interview Questions
3.9
 • 450 Interviews
Vishal Mega Mart Interview Questions
3.7
 • 175 Interviews
Titan Company Interview Questions
4.3
 • 166 Interviews
Croma Interview Questions
3.9
 • 154 Interviews
Reliance Digital Interview Questions
4.1
 • 144 Interviews
Lowe's Interview Questions
4.1
 • 136 Interviews
Reliance Trends Interview Questions
4.1
 • 111 Interviews
JioMart Interview Questions
3.9
 • 102 Interviews
Trent Interview Questions
4.0
 • 91 Interviews
View all
Walmart Software Engineer III Salary
based on 2.1k salaries
₹23 L/yr - ₹41 L/yr
8% more than the average Software Engineer III Salary in India
View more details

Walmart Software Engineer III Reviews and Ratings

based on 164 reviews

3.2/5

Rating in categories

3.1

Skill development

3.1

Work-life balance

3.4

Salary

3.4

Job security

3.1

Company culture

2.5

Promotions

2.8

Work satisfaction

Explore 164 Reviews and Ratings
Software Engineer III

Bangalore / Bengaluru

3-8 Yrs

₹ 15-47 LPA

Software Engineer III

Bangalore / Bengaluru

6-11 Yrs

Not Disclosed

Software Engineer III

Bangalore / Bengaluru

3-8 Yrs

₹ 17.8-33 LPA

Explore more jobs
Software Engineer III
2.1k salaries
unlock blur

₹22.7 L/yr - ₹41 L/yr

Senior Software Engineer
1.7k salaries
unlock blur

₹34.1 L/yr - ₹60 L/yr

Software Engineer
942 salaries
unlock blur

₹19.1 L/yr - ₹35 L/yr

Software Developer
464 salaries
unlock blur

₹18.9 L/yr - ₹35 L/yr

Software Development Engineer 3
378 salaries
unlock blur

₹24 L/yr - ₹40 L/yr

Explore more salaries
Compare Walmart with

Amazon

4.0
Compare

Reliance Retail

3.9
Compare

DMart

3.9
Compare

Reliance Digital

4.1
Compare
write
Share an Interview