Lecture 35 Quiz: Spring IoC, Bean Scopes & Life Cycle Callbacks

Note

Review before quiz: Lectures | Week 11 Content | Lab 8

Lecture 35 Self-Check

Question 1: What does the singleton bean scope mean in Spring?

Select an item

A. One new instance is created for every call to getBean()

B. One instance is shared across all Spring containers in the JVM

C. One instance per Spring container, shared by all that request it

D. One instance per HTTP request

Question 2: Which scope creates a brand new bean instance for every getBean() call, and Spring does NOT manage its destruction?

Select an item

A. singleton

B. prototype

C. session

D. request

Question 3: When multiple init callbacks are present, what is the correct execution order in Spring?

Select an item

A. @PostConstruct → afterPropertiesSet() → init-method

B. init-method → afterPropertiesSet() → @PostConstruct

C. afterPropertiesSet() → @PostConstruct → init-method

D. All three run simultaneously in parallel threads

Question 4: When does @PostConstruct run in the Spring bean lifecycle?

Select an item

A. Just before the bean is instantiated

B. After dependency injection is complete, just before the bean is put into service

C. Every time the bean's method is invoked

D. When the Spring container starts scanning for components

Question 5: Why is proxyMode = ScopedProxyMode.TARGET_CLASS needed when using request or session scope in a Spring MVC app?

Select an item

A. @Scope("request") alone is sufficient in all Spring contexts

B. proxyMode = ScopedProxyMode.TARGET_CLASS is required so a singleton bean can hold a reference to a shorter-scoped bean

C. Request-scoped beans are automatically proxied by default with no extra configuration

D. You must register the bean in web.xml for request scope to work