Kyndryl Lead Engineer Interview Questions and Answers

Q1. Remove duplicates in an array
Ans. 
Use a hash set to remove duplicates in an array of strings
• Create a hash set to store unique elements

• Iterate through the array and add each element to the hash set

• Convert the hash set back to an array to get the unique elements
Answered by AI
Add your answer
Q2. What is react virtual DOM
Ans. 
React virtual DOM is a lightweight copy of the actual DOM, used for efficient updates and rendering in React applications.
• Virtual DOM is a concept where a lightweight copy of the actual DOM is created in memory.

• React uses virtual DOM to efficiently update and render components without directly manipulating the actual DOM.

• When changes are made to the virtual DOM, React calculates the most efficient way to update the act...read more
Answered by AI
Add your answer
Q3. React hooks with example
Ans. 
React hooks are functions that let you use state and other React features without writing a class.
• React hooks were introduced in React 16.8 to allow functional components to have state and lifecycle methods.

• useState() is a hook that allows you to add state to functional components.

• useEffect() is a hook that allows you to perform side effects in functional components.

• useContext() is a hook that allows you to use the con...read more
Answered by AI
Add your answer

Q1. Questions on core java concepts
Add your answer
Q2. Questions on SQL and Springboot
Add your answer

Q1. Questions on Collection framework.
Add your answer
Q2. Questions on Springboot and core java
Add your answer

Q1. Scenario based question
Add your answer
Q2. Stream API questions
Add your answer

Q1. Graphql , Web workers vs Service workers
Ans. 
GraphQL is a query language for APIs, Web workers run scripts in background threads, Service workers are scripts that run in the background and can intercept network requests.
• GraphQL is a query language for APIs that allows clients to request only the data they need.

• Web workers run scripts in background threads separate from the main browser thread, improving performance by handling tasks concurrently.

• Service workers a...read more
Answered by AI
Add your answer

Q1. Technical related to my experience
Add your answer

Q1. How to critical things in your project
Add your answer

Q1. Expected Facilities
Add your answer

Q1. Describe your experience
Add your answer
Q2. What are the projects you worked?
Add your answer
Q3. Explain the process of turbine startup
Ans. 
Turbine startup involves several steps to safely bring the turbine to operating speed.
• Perform pre-start checks to ensure all systems are ready

• Open steam inlet valves to allow steam to flow into the turbine

• Gradually increase steam flow to bring the turbine up to speed

• Monitor temperature and pressure levels throughout the startup process

• Verify all systems are functioning properly before reaching full operating speed
Answered by AI
Add your answer

Q1. Are you sure you can handle this responsibility
Add your answer
Q2. What is your salary expectations
Add your answer

Q1. What is your salary expectations
Add your answer
Q2. How soon can you join?
Add your answer

Q1. Given a list of string if number is even do plus 1 convert to odd else keep it as is and return the converted list , then write junit test cases
Ans. 
Convert even numbers in a list of strings to odd by adding 1
• Iterate through the list of strings and check if each element is a number

• If the number is even, convert it to odd by adding 1

• Return the modified list of strings
Answered by AI
Add your answer
Q2. Spring boot create a stateless microservice write CRUD api explain how will you write what will you return
Ans. 
I would use Spring Boot to create a stateless microservice with CRUD API, returning appropriate responses for each operation.
• Use @RestController annotation to define RESTful endpoints

• Implement methods for Create, Read, Update, and Delete operations using @PostMapping, @GetMapping, @PutMapping, @DeleteMapping annotations

• Return appropriate HTTP status codes (e.g. 200 for successful operation, 404 for not found, 400 for b...read more
Answered by AI
Add your answer
Q3. General question about ms
Add your answer

Create a autocomplete component with best practices.

Q1. Create a todolist using plain javascript
Ans. 
Create a todolist using plain javascript
• Create an input field for adding tasks

• Use an array to store the tasks

• Display the tasks in a list on the webpage

• Add functionality to mark tasks as completed or delete them
Answered by AI
Add your answer
Q2. Explain web vitals
Ans. 
Web vitals are a set of metrics related to user experience on websites, including loading speed, interactivity, and visual stability.
• Web vitals include metrics such as Largest Contentful Paint (LCP), First Input Delay (FID), and Cumulative Layout Shift (CLS).

• They are important for measuring and improving user experience on websites.

• Google uses web vitals as a ranking factor for search results.

• Developers can use tools l...read more
Answered by AI
Add your answer
Q3. What is the importance of knowing js internals
Ans. 
Understanding JavaScript internals is important for optimizing performance, debugging, and writing efficient code.
• Helps in optimizing performance by understanding how JavaScript engines work under the hood

• Aids in debugging by knowing how different data types are stored and manipulated

• Enables writing efficient code by understanding concepts like event loop, closures, and prototypes
Answered by AI
Add your answer