Discover the default scope for Spring bean instances and learn about the different scopes available in the Spring framework. Improve your understanding of Spring bean management for the Professional Develop VMware Spring 2V0-72.22 certification exam.
Table of Contents
Question
Spring puts each bean instance in a scope. What is the default scope? (Choose the best answer.)
A. prototype
B. singleton
C. request
D. session
Answer
B. singleton
Explanation
In the Spring framework, the default scope for bean instances is singleton. When a bean is defined with the singleton scope, the Spring container creates a single instance of that bean, and all requests for that bean will return the same instance.
The singleton scope is the most commonly used scope in Spring applications. It ensures that only one instance of the bean is created and shared across the entire application context. This is useful for stateless beans, such as service classes, repositories, and utility classes, where maintaining a single instance is sufficient and efficient.
Other scopes available in Spring include:
- prototype: A new instance of the bean is created every time it is requested.
- request: A new instance of the bean is created for each HTTP request in a web application.
- session: A new instance of the bean is created for each HTTP session in a web application.
To define a bean with a specific scope, you can use the @Scope annotation or configure it in XML configuration files. However, if no scope is explicitly specified, Spring defaults to the singleton scope.
Understanding bean scopes is crucial for managing the lifecycle and behavior of beans in a Spring application. The singleton scope is the most commonly used and is the default scope in Spring.
Professional Develop VMware Spring 2V0-72.22 certification exam practice question and answer (Q&A) dump with detail explanation and reference available free, helpful to pass the Professional Develop VMware Spring 2V0-72.22 exam and earn Professional Develop VMware Spring 2V0-72.22 certification.