Lecture 33 Quiz: Spring Core Basics & Dependency Injection

Note

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

Lecture 33 Self-Check

Question 1: What does Inversion of Control (IoC) mean in Spring?

Select an item

A. The application calls a library to get what it needs

B. The framework controls object creation and injects dependencies into your code

C. The developer manually instantiates all objects with new

D. The database manages Java object creation automatically

Question 2: Which injection style is recommended for mandatory dependencies because it supports immutable final fields?

Select an item

A. Constructor injection

B. Setter injection

C. Field injection

D. All three are equally preferred

Question 3: What is a key difference between ApplicationContext and BeanFactory?

Select an item

A. BeanFactory eagerly initialises all beans at startup; ApplicationContext is lazy

B. ApplicationContext eagerly initialises beans and adds event publishing, i18n, and annotation support

C. They are identical — ApplicationContext is just a renamed alias

D. BeanFactory supports AOP; ApplicationContext does not

Question 4: Which approach is Java Config style for defining Spring beans?

Select an item

A. @Configuration + @Bean methods in a Java class

B. <bean> declarations in an XML file

C. @Component + @Autowired on classes

D. @SpringBootApplication on the main class

Question 5: Why is field injection (@Autowired directly on a field) discouraged in production code?

Select an item

A. It causes a NullPointerException at deploy time

B. It increases performance significantly

C. Fields cannot be final, dependencies are hidden, and the class is hard to unit test without Spring

D. Spring automatically converts field injection to constructor injection at runtime