Spring - Core

Question 1

What are the main features and benefits of the Spring Framework?

Answer 1

Question 2

What is Inversion of Control (IoC) and how does Spring implement it?

Answer 2

Question 3

What is Dependency Injection (DI) and what are the types supported by Spring?

Answer 3

Question 4

What is the difference between constructor injection and setter injection in Spring?

Answer 4

Question 5

What are Spring Beans? How are they defined and managed in the Spring container?

Answer 5

Question 6

What is the Bean lifecycle in Spring?

Answer 6

Question 7

What are the different scopes of Spring Beans?

Answer 7

Question 8

What is the difference between @Component, @Repository, @Service, and @Controller?

Answer 8

Question 9

What is the role of the ApplicationContext in Spring? How is it different from BeanFactory?

Answer 9

Question 10

What is the use of @Qualifier in Spring?

Answer 10

Question 11

How is @Value used in Spring for injecting values?

Answer 11

Question 12

What is the difference between @Bean and @Component?

Answer 12

Question 13

What are Spring Profiles? How are they configured and used?

Answer 13

Question 14

What is the purpose of the @PostConstruct and @PreDestroy annotations?

Answer 14

Question 15

How can you create a thread-safe singleton bean in Spring?

Answer 15

Question 16

Explain how Spring achieves lazy initialization and how it differs from eager initialization.

Answer 16