AmbitionBox
Interview Questions
- Reviews
- Salaries
- Interview Questions
- About Company
- Benefits
- Jobs
- Office Photos
- Community
Add office photos
Filter interviews by
Walmart Labs Interview Questions and Answers
35 Interview questions
To check logs, analyze log files for errors, warnings, and relevant information to troubleshoot issues effectively.
Identify the log file location, e.g., /var/log/syslog for system logs.
Use tools like grep to filter logs for specific keywords, e.g., 'grep error /var/log/syslog'.
Check timestamps to correlate events, e.g., 'tail -n 100 /var/log/syslog' for the latest entries.
Look for patterns or repeated errors that ...
Jenkins pipelines automate the process of building, testing, and deploying applications in a continuous integration/continuous delivery environment.
Declarative vs. Scripted: Declarative pipelines use a simpler syntax, while scripted pipelines offer more flexibility.
Stages: Pipelines are divided into stages, such as 'Build', 'Test', and 'Deploy', to organize the workflow.
Parallel Execution: Jenkins allows stages to...
Key components of frontend system design include user interface, data management, state management, and performance optimization.
User Interface: Designing the layout, navigation, and visual elements of the frontend.
Data Management: Handling data fetching, storage, and manipulation within the frontend.
State Management: Managing the state of the application to ensure data consistency and reactivity.
Performance Optim...
JavaScript is a popular programming language used for web development. ES6 modules are a way to organize and reuse code in JavaScript.
JavaScript is a high-level, interpreted programming language commonly used for client-side web development.
ES6 modules allow developers to split their code into separate files and import/export functions, variables, and classes between them.
ES6 introduced 'import' and 'export' keywo...
Reversing a linked list involves changing the direction of its nodes to point backward instead of forward.
Iterative approach: Use three pointers (prev, current, next) to reverse the links.
Example: For list 1 -> 2 -> 3, after reversal it becomes 3 -> 2 -> 1.
Recursive approach: Reverse the rest of the list and adjust the pointers accordingly.
Example: Base case when current is null, then set head to prev.
HashMap is implemented using an array of linked lists to store key-value pairs.
HashMap consists of an array of buckets, each containing a linked list of key-value pairs.
Hashing function is used to determine the index of the bucket where a key-value pair will be stored.
Collision resolution techniques like chaining or open addressing are used to handle collisions.
HashMap allows null keys and values, but only one nul...
A date picker in JavaScript allows users to select a date from a calendar interface.
Use HTML input element with type 'date' for modern browsers
For older browsers, use a JavaScript library like jQuery UI Datepicker
Implement validation to ensure selected date is within acceptable range
Use two threads to print numbers 1 to 10, with Thread A printing odd numbers and Thread B printing even numbers.
Create two threads, one for odd numbers and one for even numbers
Use a shared variable to keep track of the current number being printed
Use synchronization mechanisms like mutex or semaphore to ensure proper sequencing of numbers
Zookeeper uses odd number of nodes to ensure a majority quorum for leader election and data consistency.
Odd number of nodes helps in avoiding split-brain scenarios where multiple nodes claim to be the leader
With an odd number of nodes, a majority quorum can be established to elect a leader and maintain data consistency
In case of network partitions, having an odd number of nodes ensures that there is always a major...
Planning for an ERP migration involves thorough assessment, stakeholder engagement, detailed project plan, testing, and training.
Conduct a thorough assessment of current ERP system, data, processes, and requirements for the new system.
Engage stakeholders from various departments to gather input, address concerns, and ensure buy-in.
Develop a detailed project plan outlining tasks, timelines, resources, and dependenc...
Walmart Labs Interview Experiences
48 interviews found
Mohan Kotla
Interview Questionnaire
13 Questions
- Q1. There is 3*3 RUBIX cube, Can you find data structure for solving rubix cube
- Ans.
A graph data structure can be used to solve a Rubix cube.
Each cubelet can be represented as a node in the graph.
Edges can be added between nodes to represent possible moves.
A search algorithm like BFS or DFS can be used to find the solution.
- Q2. Given array of weights(infinite supply), can you find that given weight can be formed by using those set of weights?(dynamic programming,geeksforgeeks)
- Ans.
Dynamic programming solution to find if a given weight can be formed using an array of weights
Create a boolean array of size (given weight + 1) to store if a weight can be formed or not
Initialize the first element of the boolean array to true
Iterate through the array of weights and for each weight, iterate through the boolean array and mark true for all weights that can be formed using the current weight
Return the valu...
- Q3. If Redo and Undo operations have to perform, which datastructure can we use?(stack)
- Ans.
Stack data structure is suitable for implementing Redo and Undo operations.
Stack follows Last-In-First-Out (LIFO) order, which is ideal for undoing and redoing operations.
When an operation is performed, it can be pushed onto the stack for undoing later.
To redo an operation, the previously undone operations can be popped from the stack.
Stack provides efficient insertion and deletion at one end, making it suitable for un...
- Q4. Can you explain me about Router ?
- Ans.
A router is a networking device that forwards data packets between computer networks.
Routers operate at the network layer of the OSI model.
They use routing tables to determine the best path for data packets to travel.
Routers can connect multiple networks together, such as a home network to the internet.
They can also provide security by blocking unauthorized access to a network.
Examples of routers include Cisco, Netgear...
- Q5. Can you explain the project that you mentioned in resume?
- Ans.
Developed a web-based project management tool for a client
Used React.js for the frontend and Node.js for the backend
Implemented user authentication and authorization using JWT
Integrated with third-party APIs such as Google Drive and Trello
Implemented real-time notifications using WebSockets
Deployed the application on AWS EC2 instance
- Q6. One simple puzzle?(cant explain through words)
- Q7. Normal HR questions
- Q8. It is like Preplacement talk
- Q9. Two wire burning puzzle(ans: 45min)
- Q10. Triangle and three ants puzzle(ans: collision prob: 3/4)
- Q11. Explain about how internet works?
- Ans.
The internet is a global network of interconnected devices that communicate with each other using standardized protocols.
The internet is made up of millions of interconnected devices such as computers, servers, routers, and switches.
Data is transmitted across the internet using standardized protocols such as TCP/IP.
The internet is accessed through Internet Service Providers (ISPs) who provide users with a connection to...
- Q12. One more coding question from array!
- Q13. How to find number of paths in tree such that sum of the values in those nodes will be equal to count?(hint:recursion)
- Ans.
Finding number of paths in tree with sum of node values equal to count using recursion.
Use recursion to traverse the tree and keep track of the sum of node values.
At each node, check if the current sum equals the desired count.
If yes, increment the path count.
Recursively traverse the left and right subtrees.
Return the total path count.
Example: Given a tree with values [10, 5, -3, 3, 2, null, 11], count the number of pa...
Interview Preparation Tips
Experience: Coding test conducted through HackerRank website. There are three codes.I think 1.30 hour duration for the test.
Tips: Practice codes from Geeksforgeeks.com, hackerrank.com, hackerearth.com.
(practice more of dynamic problem examples and 2D array problems (datastructures also).
Round: Technical Interview
Experience: They are very friendly. If you stuck some where, they will give you hints to think further. They are so much friendly, You will not get any fear.
Tips: Dont think complicately. They will see our CV before our interview. They will know in which area you are good. Dont argue with them .just answer if you know, otherwise ask for hints.
Round: Puzzle Interview
Experience: He is so friendly,
Tips: be prepare puzzles from geekspuzzles and interviewbits.com
Round: Technical Interview
Experience: they are so friendly. Maintain smile. Whatever you are doing, be interactive with them. Dont make them bore.
Tips: Prepare more logical questions too.
Round: HR Interview
Experience: I frankly answer every question. I knew that I did well in three technical rounds.so I had hope that I would select.
Tips: Dont panic. Read you resume before going for interview. No need to prepare. Answer according to question.
Round: HR Interview
Experience: They said that there will be another HR round. There it self I saturated with those many rounds. I went inside, but that is not HR round. It is like just interactive session. He asked me, "do you know anything about the company?". I replied him that It developed e-commerce sites and apps related to that. But he said that is not the actual work it is doing. He explained about company for 15 minutes. I realized that he is interested in hiring me. He asking me about Company .Then I said , "sorry sir, I dont know anything about company because I just get to know about that I shortlisted for interview at 6.00clock morning. I dont have time to know about company but I know CEO name(s) and I told to him. He said "will you attend other company interviews?". I replied " I will If you are not hiring me. That depends on your decision". He asked "What will be you next aim?". I replied "I will be in resposible position as you are now". He said "dont go for other company interviews, wait for a second". He came with few gifts and Instructions letter and said "you are finally selected". All the interviewers came to wish me and took selfie. GREAT INTERVIEW EXPERIENCE with GREAT INTERVIEWERS for GREAT COMPANY.
Skills:
College Name: IIT Kharagpur
Skills evaluated in this interview
Shivam Kapoor
The interview consisted of five rounds, with each round serving as an elimination stage. There were questions regarding the development of a product using a niche market.
There were many questions regarding the Coca-Cola case study.
(2 Questions)
- Q1. What were the primary topics discussed during the interview, particularly regarding salary and behavioral questions?
- Q2. What experiences do you have with negotiating job offers? salary discussion
Anonymous
I applied via LinkedIn and was interviewed in Sep 2024. There were 2 interview rounds.
1 Hour Leetcode style medium difficulty question. Test was taken on hacker rank.
(2 Questions)
- Q1. Computer vision related question on object detections
- Q2. Question on model training, evaluation etc.
Interview Preparation Tips
Selected
I applied via Naukri.com and was interviewed in Dec 2024. There was 1 interview round.
(2 Questions)
- Q1. Tell me about youself
- Ans.
I am a software engineer with 5 years of experience in developing web applications using various technologies.
5 years of experience in software development
Proficient in developing web applications
Skilled in using various technologies
- Q2. Software architecture
(2 Questions)
- Q1. Array based question
- Q2. DP based question
(2 Questions)
- Q1. Internal implementation of HashMap
- Ans.
HashMap is implemented using an array of linked lists to store key-value pairs.
HashMap consists of an array of buckets, each containing a linked list of key-value pairs.
Hashing function is used to determine the index of the bucket where a key-value pair will be stored.
Collision resolution techniques like chaining or open addressing are used to handle collisions.
HashMap allows null keys and values, but only one null key...
- Q2. In depth javascript concepts
(2 Questions)
- Q1. Project based discussion
- Q2. Design for a date picker in javascript
- Ans.
A date picker in JavaScript allows users to select a date from a calendar interface.
Use HTML input element with type 'date' for modern browsers
For older browsers, use a JavaScript library like jQuery UI Datepicker
Implement validation to ensure selected date is within acceptable range
Skills evaluated in this interview
I applied via Referral and was interviewed in Dec 2024. There was 1 interview round.
10 random qs on software things, and 2 qs leetcode style one easy and one easy medium
Interview Preparation Tips
- DSA
Rohit Jaiswal
I appeared for an interview in Mar 2025, where I was asked the following questions.
- Q1. How to check log
- Ans.
To check logs, analyze log files for errors, warnings, and relevant information to troubleshoot issues effectively.
Identify the log file location, e.g., /var/log/syslog for system logs.
Use tools like grep to filter logs for specific keywords, e.g., 'grep error /var/log/syslog'.
Check timestamps to correlate events, e.g., 'tail -n 100 /var/log/syslog' for the latest entries.
Look for patterns or repeated errors that may i...
- Q2. Explain pipelines of Jenkin
- Ans.
Jenkins pipelines automate the process of building, testing, and deploying applications in a continuous integration/continuous delivery environment.
Declarative vs. Scripted: Declarative pipelines use a simpler syntax, while scripted pipelines offer more flexibility.
Stages: Pipelines are divided into stages, such as 'Build', 'Test', and 'Deploy', to organize the workflow.
Parallel Execution: Jenkins allows stages to run ...
I applied via Recruitment Consulltant and was interviewed in Nov 2024. There was 1 interview round.
Leetcode Medium - Arrays, HashMaps
Monu Shekhawat
(2 Questions)
- Q1. They asked knapsack problem
- Q2. They asked reverse linked list
- Ans.
Reversing a linked list involves changing the direction of its nodes to point backward instead of forward.
Iterative approach: Use three pointers (prev, current, next) to reverse the links.
Example: For list 1 -> 2 -> 3, after reversal it becomes 3 -> 2 -> 1.
Recursive approach: Reverse the rest of the list and adjust the pointers accordingly.
Example: Base case when current is null, then set head to prev.
PRATYUSH PATWA
(2 Questions)
- Q1. Implement Stack using Queue.
- Ans.
Implement a stack using a queue data structure.
Use two queues to simulate a stack.
Push operation: Enqueue the element to queue 1.
Pop operation: Dequeue all elements from queue 1 to queue 2, dequeue the last element from queue 2.
Top operation: Return the front element of queue 1.
Empty operation: Check if both queues are empty.
- Q2. Use two thread two print From 1 to 10 where Thread A will be for odd and Thread B will be for even.
- Ans.
Use two threads to print numbers 1 to 10, with Thread A printing odd numbers and Thread B printing even numbers.
Create two threads, one for odd numbers and one for even numbers
Use a shared variable to keep track of the current number being printed
Use synchronization mechanisms like mutex or semaphore to ensure proper sequencing of numbers
Skills evaluated in this interview
Selected
I applied via Referral and was interviewed in Mar 2024. There were 3 interview rounds.
(2 Questions)
- Q1. Find the subarray with given sum.
- Ans.
Find subarray with given sum in an array of integers.
Use a sliding window approach to find subarray with sum equal to given sum.
Keep track of current sum and adjust window size accordingly.
Return the indices of the subarray if found, else return an empty array.
- Q2. Java concurrency question
(1 Question)
- Q1. Questions based on bst
(1 Question)
- Q1. Mostly managerial questions
Skills evaluated in this interview
Top trending discussions
Walmart Labs Interview FAQs
Some of the top questions asked at the Walmart Labs interview -
The duration of Walmart Labs interview process can vary, but typically it takes about less than 2 weeks to complete.
Tell us how to improve this page.
Walmart Labs Interviews By Designations
- Walmart Labs Software Engineer Interview Questions
- Walmart Labs Software Engineer III Interview Questions
- Walmart Labs Software Developer Interview Questions
- Walmart Labs Product Manager Interview Questions
- Walmart Labs Associate Product Manager Interview Questions
- Walmart Labs Quality Engineer Interview Questions
- Walmart Labs Statistical Analyst Interview Questions
- Walmart Labs Software Engineer II Interview Questions
- Show more
Interview Questions for Popular Designations
Overall Interview Experience Rating
based on 36 interview experiences
Difficulty level
Duration
Interview Questions from Similar Companies
Walmart Labs Reviews and Ratings
based on 105 reviews
Rating in categories
|
Senior Software Engineer
45
salaries
|  ₹17.2 L/yr - ₹60 L/yr |
|
Software Developer
20
salaries
| ₹10 L/yr - ₹35 L/yr |
|
Software Engineer III
19
salaries
| ₹15 L/yr - ₹60 L/yr |
|
Principal Engineer
19
salaries
| ₹34.5 L/yr - ₹70 L/yr |
|
Software Development Engineer 3
17
salaries
| ₹16 L/yr - ₹40 L/yr |
TCS
Accenture
Wipro
Cognizant
- Home >
- Interviews >
- Walmart Labs Interview Questions
