1Z0-819 Modular Development & Deployment Practices

Question 1

What feature was introduced in Java 9 to support modular development?

Accepted Answer

Modules

Answer

Packages

Answer

Interfaces

Answer

Annotations

Question 2

Which file defines a module in Java?

Accepted Answer

module-info.java

Answer

module.xml

Answer

module.config

Answer

mod-definition.txt

Question 3

What keyword is used to declare a module requirement?

Accepted Answer

requires

Answer

import

Answer

depends

Answer

include

Question 4

What does the 'exports' keyword do in module-info.java?

Accepted Answer

Exposes packages to other modules

Answer

Defines class visibility.

Answer

Initializes class paths.

Answer

Registers libraries.

Question 5

What is jlink used for?

Accepted Answer

To create a custom Java runtime image

Answer

To compile Java code.

Answer

To launch web apps.

Answer

To link native libraries.

Question 6

Which command compiles modules?

Accepted Answer

javac --module-source-path

Answer

java

Answer

jar

Answer

jmod

Question 7

What is a named module?

Accepted Answer

A module with a defined name in module-info.java

Answer

A default unnamed module.

Answer

A module imported with wildcards.

Answer

An internal module only.

Question 8

What tool is used to package compiled modules?

Accepted Answer

jar

Answer

jmod

Answer

javap

Answer

jmap

Question 9

What is the benefit of modular programming?

Accepted Answer

Improved encapsulation and modular deployment

Answer

Increased code duplication.

Answer

Complex dependencies.

Answer

Harder to reuse components.