WNS Vuram Associate Software Developer Interview Questions and Answers

30 questions overall

Q1. System design and project
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Q2. How to centralize solar power plant in yur college
Ans. 
Centralizing a solar power plant in a college involves selecting a suitable location, designing the system, obtaining necessary permits, and installing the equipment.
• Conduct a feasibility study to determine the best location for the solar power plant on campus.

• Design the solar power system based on the energy needs of the college and available space.

• Obtain permits and approvals from local authorities and utility compan...read more
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Coding test was really good it was easier to tackle the problem and writting code for it.

Q1. Can you tell me about yourself?
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Q2. What is the major project you have worked on, and can you provide an explanation of it?
Ans. 
Developed a web-based project management tool for tracking tasks and deadlines.
• Used React.js for front-end development

• Implemented RESTful APIs using Node.js and Express

• Utilized MongoDB for database storage

• Incorporated authentication and authorization features for user security
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Q1. SQL ques and concept
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Focusing on moderate level patterns

Q1. Discuss object oriented principles in depth
Ans. 
Object oriented principles are fundamental concepts in software development that focus on organizing code into objects with properties and behaviors.
• Encapsulation: Bundling data and methods that operate on the data into a single unit.

• Inheritance: Allowing a new class to inherit properties and behaviors from an existing class.

• Polymorphism: The ability for objects of different classes to respond to the same message in di...read more
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Q2. Deep discuss of interface
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Q3. Deep discuss of exception, multithreading
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Q4. Deep discuss of oop
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Q1. Asked some tricky question related to real life problems
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Leet code medium level question

Q1. About Java Streams
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Q2. Restful API coding completion based on given file
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Q1. To check your attitude
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Q2. Given detailed about company and what project you are going to work on?
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Q1. Hashmap working
Ans. 
Hashmap is a data structure that stores key-value pairs and allows for fast retrieval of values based on keys.
• Hashmap uses a hashing function to map keys to indices in an array.

• It allows for constant time complexity O(1) for insertion, deletion, and retrieval operations.

• Example: HashMap<String, Integer> map = new HashMap<>(); map.put("key", 123); int value = map.get("key");
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Q2. Multithreading cases
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Q3. Scenario specific on how to handle multiple events on a single variable to have accurate result
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Q4. Database indexing
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Q5. Architecture level
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Javascript, css, angular and HTML

JS, angular and HTML

Q1. What will you handle pressure?
Ans. 
I handle pressure by staying organized, prioritizing tasks, and maintaining open communication with team members.
• Staying organized by creating to-do lists and setting realistic deadlines

• Prioritizing tasks based on deadlines and importance

• Maintaining open communication with team members to delegate tasks and ask for help when needed
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Q2. Manager was telling about the project.
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Q1. Springboot notations
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Q2. How to handle multiple request on springboot
Ans. 
Use thread pooling and asynchronous processing to handle multiple requests efficiently in Spring Boot.
• Implement thread pooling to manage multiple requests concurrently.

• Use asynchronous processing to handle requests without blocking the main thread.

• Consider using reactive programming with Spring WebFlux for better scalability.

• Optimize database queries and external API calls to reduce response times.

• Implement caching mec...read more
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Q1. Print Longest Increasing Subsequence
Ans. 
Print the longest increasing subsequence of an array of strings.
• Use dynamic programming to find the longest increasing subsequence.

• Iterate through the array and keep track of the longest increasing subsequence ending at each index.

• Return the longest increasing subsequence found.
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