In Spring Framework, what is the primary purpose of the @Autowired annotation?

The correct answer is A: To automatically inject dependent beans into a class. @Autowired is used for dependency injection, allowing Spring to automatically resolve and inject bean dependencies without explicit configuration.

What is the primary advantage of using PreparedStatement over Statement in JDBC?

The correct answer is A: Better performance and protection against SQL injection. PreparedStatement pre-compiles SQL and uses parameterized queries, preventing SQL injection and improving performance.

What is the purpose of Connection.commit() in JDBC?

The correct answer is B: Save all changes made in the current transaction. commit() saves all changes made during the current transaction permanently to the database.

In a multi-threaded JDBC application, what should be the approach for Connection object usage?

The correct answer is B: Each thread should use its own Connection from the pool. Connection objects are not thread-safe. Each thread should obtain its own Connection from a thread-safe connection pool to avoid race conditions.

What will be the result of executing this code? PriorityQueue pq = new PriorityQueue(); pq.add(5); pq.add(3); pq.add(7); System.out.println(pq.peek());

The correct answer is B: 3. PriorityQueue orders elements based on their natural ordering (min-heap by default). peek() returns 3, the minimum element.

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Java Programming
Spring Framework Basics

Java OOP, collections, multithreading

15 Q 10 Topics Take Mock Test

Difficulty: All Easy Medium Hard 11–15 of 15

Topics in Java Programming

All Basics & Syntax 100 OOP in Java 100 Collections Framework 100 Multithreading 100 Exception Handling 100 I/O Streams 100 JDBC 100 Generics 100 Lambda Expressions 100 Spring Framework Basics 58

Q.11 Easy Spring Framework Basics

Which XML element is used to define a bean in Spring XML configuration?

Correct Answer: B.

EXPLANATION

The <bean> element is the standard XML element used in applicationContext.xml to define Spring beans.

Test

Q.12 Easy Spring Framework Basics

What does @Autowired annotation do in Spring?

A Automatically injects dependencies by type

B Creates a new bean instance

C Marks a class as deprecated

D Enables auto-scanning of packages

Correct Answer: A. Automatically injects dependencies by type

EXPLANATION

@Autowired performs type-based dependency injection. Spring looks for a bean of the required type and injects it automatically.

Test

Q.13 Easy Spring Framework Basics

Which of the following is NOT a valid Spring bean scope in Spring 5.x+?

A singleton

B prototype

C request

D eternal

Correct Answer: D. eternal

EXPLANATION

Valid scopes are singleton, prototype, request, session, application, and websocket. 'eternal' is not a valid scope.

Test

Q.14 Easy Spring Framework Basics

What is the primary purpose of Dependency Injection (DI) in Spring Framework?

A To increase code complexity

B To reduce coupling between classes and improve testability

C To replace all design patterns

D To automatically generate SQL queries

Correct Answer: B. To reduce coupling between classes and improve testability

EXPLANATION

DI reduces coupling by injecting dependencies rather than creating them internally, making code more testable and maintainable.

Test

Q.15 Easy Spring Framework Basics

Which annotation is used to mark a class as a Spring Bean in the latest Spring Framework?

A @Bean

B @Component

C @Service

D @Controller

Correct Answer: B. @Component

EXPLANATION

@Component is a generic stereotype annotation for any Spring-managed component. @Bean is used on methods, while @Service and @Controller are specialized versions of @Component.

Test

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