Walmart Senior Software Development Engineer Interview Questions and Answers

Q1. Linked List Intersection Point
Ans. 
Find the intersection point of two linked lists.
• Use two pointers to traverse the linked lists

• Calculate the difference in length between the two lists

• Move the pointer of the longer list ahead by the difference

• Move both pointers simultaneously until they meet at the intersection point
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Q2. Basic Spring Boot
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Q3. Stream and Java 8 Questions
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Was easy to crack infact was simple

Involve group of 8 and related to come and pros

Q1. What are software testing techniques
Ans. 
Software testing techniques are methods used to ensure that software applications are functioning correctly and meeting requirements.
• Black box testing: Testing the functionality of a software application without knowing its internal code.

• White box testing: Testing the internal code and structure of a software application.

• Unit testing: Testing individual units or components of a software application.

• Integration testing:...read more
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I like to choose topics java, c, python, html etc

About java, python, c, c++, html and about coding language

Hoe to built skill discussion about problem and how solve it

There was a aptitude test with coding problems

Q1. Basic Puzzles were asked
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Q1. DSA questions and basics on the platform of work
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Q2. Self explanatory and Experience related questions
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2 DSA questions and some MCQ on Java and Spring

Q1. Longest palindromic substring
Ans. 
A palindromic substring is a string that reads the same forwards and backwards.
• Use dynamic programming to find the longest palindromic substring.

• Start by considering each character as the center of a potential palindrome.

• Expand outwards from each center to check for palindromes of odd and even lengths.
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Q2. Remove duplicates in place from a 1D array
Ans. 
Remove duplicates from a 1D array of strings in place
• Iterate through the array and use a HashSet to keep track of unique elements

• Replace duplicates with null or an empty string to remove them in place
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Q1. Project discussion
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Q2. Search min element in a rotated sorted array with duplicate elements
Ans. 
Search for the minimum element in a rotated sorted array with duplicate elements.
• Use binary search to find the minimum element in the rotated sorted array.

• Handle the case where duplicate elements are present by adjusting the search conditions.

• Consider cases where the array is not rotated or contains only one element.
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Q3. Ways of declaring singleton class
Ans. 
A singleton class is a class that can only have one instance created throughout the application.
• Declare a private static instance variable of the class

• Create a private constructor to prevent external instantiation

• Provide a public static method to access the instance
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Q1. Project discussion
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Q2. Behavioural questions
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Q1. System Design Questions, Situation based problems of system design
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Q2. Data Structure Coding question of HashMap
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Q1. Again System design, Question from your project and architecture of your project
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Q1. React js questions like Dom manipulation, useCallback and useMemo these kind of questions
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Q2. Create some dynamic buttons with a json data and whenever you click on that you need to maintain active and inactive states and also you need to show the content of the button based on the json data whenev...read more
Ans. 
Create dynamic buttons with JSON data, maintain active/inactive states, and show content on click
• Create buttons dynamically using JSON data

• Toggle between active and inactive states on click

• Display button content based on JSON data on click
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Q1. More advanced react based questions like test cases handling and redux state management techniques
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Q2. Prop drilling concepts
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Q1. More about your projects you have worked on and also front end technical basic questions
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Q1. Why Lowe's only
Ans. 
Lowe's is a leading home improvement retailer with a strong focus on technology and innovation.
• Lowe's has a strong reputation for investing in technology and innovation within the home improvement industry.

• I am impressed by Lowe's commitment to digital transformation and their use of cutting-edge tools and technologies.

• I believe Lowe's offers a challenging and rewarding environment for software engineers to grow and de...read more
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Q2. What are your expectations here nd all
Ans. 
I expect a challenging work environment, opportunities for growth, and a supportive team.
• Challenging work that allows me to utilize my skills and learn new technologies

• Opportunities for career advancement and professional development

• A supportive team that fosters collaboration and growth

• Clear communication and expectations from management
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