Oracle Java OCP Modules and Packaging Quiz

1. What does the 'opens' statement do in a module declaration?

Exports a package for compile-time use only

Allows reflective access to a package at runtime

Imports packages from other modules

Declares optional dependencies

2. True or False: A package can be exported from multiple modules in the same application.

True

False

3. Which command-line option lists all available modules in the JDK?

--list-modules

--show-modules

--describe-modules

--module-list

4. What does 'module encapsulation' refer to in the Java Platform Module System?

Hiding internal implementation details by controlling exports

Compressing module files for distribution

Encrypting module source code

Combining multiple classes into a single package

5. True or False: An unnamed module can access all exported packages from named modules.

True

False

6. Which statement pairs with 'uses' to provide a service implementation?

Provides

Exports

Requires

Opens

7. What is the purpose of the 'uses' statement in module-info.java?

Declare a service interface consumed by the module

Import a specific class from another module

Export a package to multiple modules

Define a compile-time dependency

8. True or False: You can have multiple module declarations in a single module-info.java file.

True

False

9. In the Java Platform Module System, what is a 'named module'?

A module without a module-info.java file

A module with an explicit module-info.java declaration

A system module provided by the JDK

A deprecated module no longer supported

10. Which naming convention is recommended for Java package names?

CamelCase with uppercase letters

Lowercase with dots separating components

Uppercase with underscores

Numbers and hyphens only

11. What keyword is used to declare a module in Java?

Module

Package

Class

Interface

12. True or False: All modules automatically depend on java.base.

True

False

13. What is the 'java.base' module in the Java Platform Module System?

An optional utility module

The foundational module containing core Java classes

A third-party library module

A user-defined application module

14. Which of the following is NOT a valid module statement?

Requires java.base;

Exports com.example.api;

Imports java.util.*;

Opens com.example.internal;

15. What does 'requires static' mean in a module declaration?

The dependency is optional and only needed at compile time

The dependency is mandatory at runtime

The dependency must be re-exported

The dependency is a system module

16. True or False: A module can export a package that contains only internal classes.

True

False

17. Which keyword allows a module to depend on another module transitively?

Requires static

Requires transitive

Requires export

Requires public

18. What is the purpose of the 'requires' statement in module-info.java?

Export packages to other modules

Declare dependencies on other modules

Define public APIs

Set module version numbers

19. In a module declaration, what does the 'exports' statement do?

Imports packages from other modules

Makes a package publicly available to other modules

Declares dependencies on external libraries

Specifies the module version

20. Which file contains module declarations in a Java project?

Module.xml

Module-info.java

Pom.xml

Application.properties

Oracle Java OCP Modules and Packaging Quiz

1. What does the 'opens' statement do in a module declaration?

2.

What first name or nickname would you like us to use?

2. True or False: A package can be exported from multiple modules in the same application.

3. Which command-line option lists all available modules in the JDK?

4. What does 'module encapsulation' refer to in the Java Platform Module System?

5. True or False: An unnamed module can access all exported packages from named modules.

6. Which statement pairs with 'uses' to provide a service implementation?

7. What is the purpose of the 'uses' statement in module-info.java?

8. True or False: You can have multiple module declarations in a single module-info.java file.

9. In the Java Platform Module System, what is a 'named module'?

10. Which naming convention is recommended for Java package names?

11. What keyword is used to declare a module in Java?

12. True or False: All modules automatically depend on java.base.

13. What is the 'java.base' module in the Java Platform Module System?

14. Which of the following is NOT a valid module statement?

15. What does 'requires static' mean in a module declaration?

16. True or False: A module can export a package that contains only internal classes.

17. Which keyword allows a module to depend on another module transitively?

18. What is the purpose of the 'requires' statement in module-info.java?

19. In a module declaration, what does the 'exports' statement do?

20. Which file contains module declarations in a Java project?