Spring Framework Spring Core & Dependency Injection

Question 1

Which Spring annotation is used to mark a class as a Spring-managed component?

Accepted Answer

@Component

Answer

@Bean

Answer

@Autowired

Answer

@Service

Question 2

What is the default bean scope in Spring Framework?

Accepted Answer

singleton

Answer

prototype

Answer

request

Answer

session

Question 3

Which annotation is used to inject dependencies in Spring?

Accepted Answer

@Autowired

Answer

@Resource

Answer

@Inject

Answer

@Value

Question 4

What does the @Configuration annotation indicate in Spring?

Accepted Answer

The class is a source of bean definitions

Answer

The class contains request mappings

Answer

The class should be proxied

Answer

The class handles exceptions

Question 5

In Spring, what is the difference between constructor injection and setter injection?

Accepted Answer

Constructor injection enforces mandatory dependencies at creation time; setter injection allows optional wiring

Answer

Constructor injection supports optional dependencies; setter injection does not

Answer

Setter injection creates immutable objects; constructor injection does not

Answer

There is no functional difference between the two

Question 6

What is the ApplicationContext in Spring Framework?

Accepted Answer

An advanced IoC container that adds enterprise features on top of BeanFactory

Answer

A database connection pool

Answer

A web request handler

Answer

A configuration file parser