What Is the Default Bean Scope in Spring Framework?

Question

Accepted Answer

The default bean scope in the Spring Framework is Singleton. When a bean is defined without specifying a scope, Spring creates only one instance of that bean and shares it throughout the entire application context.

Key Points:
• Singleton is the default scope for all Spring beans.
• Only one bean instance is created per Spring IoC container.
• The same bean instance is returned whenever it is requested.
• Singleton scope is ideal for stateless components such as services, repositories, and utility classes.
• Using a single shared instance helps reduce memory consumption and improves performance.

Example:
If a UserService bean is configured with the default scope, Spring creates only one instance of UserService and shares it across all components that depend on it.

Code Example:

```
@Service
public class UserService {
}
```
Interview Tip:
A concise interview answer is:

"The default bean scope in Spring is Singleton. Spring creates a single instance of the bean per application context and shares that instance throughout the application."