TCS Java Full Stack Developer Interview Questions and Answers

Q1. Core Java, Spring boot annotations, basic code flow, current role, angular basics
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Q1. Db optimizations, performance enhancements, query optimization, how to handle huge data etc
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Hacker Rank Test contains 40 questions (39 MCQ's + 1 coding question) - 39 questions include Java 8 features, microservices, React JS, Spring.
Coding question - will test concept of inheritance, collections and stream API.

Need to get more than 60%, to advance to next round.

Q1. What are the different annotations in Spring Boot
Ans. 
Spring Boot provides various annotations for different purposes.
• The @RestController annotation is used to create RESTful web services.

• The @Autowired annotation is used for automatic dependency injection.

• The @RequestMapping annotation is used to map HTTP requests to specific methods.

• The @Component annotation is used to mark a class as a Spring component.

• The @Service annotation is used to mark a class as a Spring service...read more
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Q2. Explain Routes and how it is handled in React js
Ans. 
Routes in React js are used to define the navigation paths and handle the rendering of different components based on the URL.
• Routes are defined using the React Router library

• Each route is associated with a specific URL path and a corresponding component

• When a user navigates to a specific URL, the corresponding component is rendered

• Routes can also have parameters that can be accessed in the component

• Nested routes can be
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Q3. What are microservices
Ans. 
Microservices are a software architectural style that structures an application as a collection of small, loosely coupled services.
• Microservices are independent, self-contained components that can be developed, deployed, and scaled independently.

• Each microservice focuses on a specific business capability and communicates with other microservices through APIs.

• Microservices promote flexibility, scalability, and resilienc...read more
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Interview was 30mins, and asked streams and annotations in java

Q1. Questions about Spring
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Q1. Deep into spring
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Q1. About SQL and quireis
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