Java Full Stack Developer

1. What is the default value of a boolean variable in Java?

A) true B) false C) null D) 0

2. Which of these is not a valid access modifier in Java?

A) public B) private C) protected D) internal

3. In Spring Boot, what annotation is used to define a REST controller?

A) @Service B) @Component C) @RestController D) @Entity

4. What is the main advantage of using JPA with Hibernate?

A) Fast rendering B) Database independence C) Better CSS D) Client-side security

5. Which HTTP method is used to update a resource?

A) GET B) POST C) PUT D) HEAD

6. In React, which hook is used to manage component lifecycle effects?

A) useData B) useFetch C) useEffect D) useAction

7. What is the purpose of @Autowired in Spring?

A) Starts a new thread B) Injects a dependency automatically C) Creates a static variable D) Defines a database

8. Which command starts a Spring Boot application?

A) java -start B) spring boot run C) mvn spring-boot:run D) boot up

9. What is the file extension for a Java compiled class?

A) .jav B) .java C) .class D) .j

10. Which tag is used to insert JavaScript in HTML?

A) <script> B) <js> C) <java> D) <code>

11. What SQL clause is used to filter rows?

A) GROUP B) FILTER C) WHERE D) ORDER

12. In Spring Boot, what does application.properties do?

A) Holds frontend layout B) Stores security tokens C) Manages app configuration D) Hosts HTML templates

13. What is JSX in React?

A) Java XML B) JavaScript with XML syntax C) Java Socket Exchange D) Java Spring Extension

14. What does this keyword refer to in Java?

A) Current thread B) Current class object C) Parent class D) Interface

15. In Angular, which command is used to generate a new component?

A) ng generate app B) ng create comp C) ng generate component D) angular add

16. Which annotation in Spring is used for transaction management?

A) @Managed B) @Transactional C) @Session D) @Service

17. Which SQL statement is used to change data in a table?

A) UPDATE B) MODIFY C) INSERT D) SELECT

18. What is the main use of Docker in full stack development?

A) Store images B) Automate HTML layout C) Containerize applications D) Create databases

19. Which is not a valid HTTP status code?

A) 200 B) 404 C) 503 D) 799

20. What tool is commonly used to build Java projects?

A) Docker B) Maven C) Postman D) ESLint

21. What is the use of key prop in React lists?

A) Store API key B) Identify unique elements C) Bind data D) Lock component

22. Which design pattern is used in Spring Dependency Injection?

A) Factory B) Singleton C) Observer D) Inversion of Control

23. What does JSON stand for?

A) Java Syntax Object Notation B) JavaScript Object Notation C) Java System Online D) Java Serialization Over Network

24. What is the advantage of using RESTful APIs?

A) Tightly coupled B) Only works with XML C) Stateless communication D) Requires SOAP

25. What does the @Entity annotation do in Hibernate?

A) Registers an endpoint B) Defines a React component C) Maps class to a DB table D) Encrypts login data

Java Full Stack Developer

🌟 Job Ready - 100% Scorers