Spring AOP (Aspect-Oriented Programming)

Question 1

What is Aspect-Oriented Programming (AOP) in Spring?

Answer 1

A programming paradigm that allows separation of cross-cutting concerns, such as logging and transaction management, from business logic.

Question 2

What is a JoinPoint in Spring AOP?

Answer 2

A point in the application execution, such as method execution, where an aspect can be applied.

Question 3

What is a Pointcut in Spring AOP?

Answer 3

A set of JoinPoints where an advice (code) should be executed.

Question 4

What is an Advice in Spring AOP?

Answer 4

Action taken by an aspect at a particular join point, such as before, after, or around method execution.

Question 5

What is @Aspect in Spring AOP?

Answer 5

An annotation to declare a class as an aspect, which contains advice.

Question 6

What is a Proxy in Spring AOP?

Answer 6

An object that acts as a substitute for another object and intercepts method calls, usually used to apply aspects.

Question 7

How does @Before advice work in Spring AOP?

Answer 7

It executes before the target method is invoked.

Question 8

How does @AfterReturning advice work in Spring AOP?

Answer 8

It runs after the target method has successfully returned a result.

Question 9

What is the purpose of @Around advice in Spring AOP?

Answer 9

It surrounds a method execution, allowing you to run code both before and after the method execution.

Question 10

How can you declare a pointcut expression in Spring AOP?

Answer 10

Using an expression like execution(* com.example.service..(..)) inside @Pointcut.