1Z0-811 Java Development and Deployment 3

Question 1

Which tool introduced in Java 9+ creates a custom runtime image containing only the modules your application needs?

Accepted Answer

jlink

Answer

jdeps

Answer

jpackage

Answer

jmod

Question 2

What is the purpose of the `jdeps` tool?

Accepted Answer

Analyze class and package-level dependencies of a JAR or class file

Answer

Generate Javadoc from source files

Answer

Package an application into a native installer

Answer

Compile Java source files to bytecode

Question 3

Which file in a JAR is responsible for specifying the Main-Class and other metadata?

Accepted Answer

META-INF/MANIFEST.MF

Answer

META-INF/module-info.class

Answer

META-INF/services/

Answer

WEB-INF/web.xml

Question 4

When compiling with modules, which flag adds a module to the set of root modules without editing module-info.java?

Accepted Answer

--add-modules

Answer

--module-path

Answer

--patch-module

Answer

--upgrade-module-path

Question 5

What is the default access level for a package inside a named module that does NOT use an `exports` directive?

Accepted Answer

The package is inaccessible to all other modules

Answer

The package is accessible to all modules on the module path

Answer

The package is accessible only to the unnamed module

Answer

The package is accessible only within the same layer

Question 6

Which command creates a `.jmod` file from a set of compiled classes and resources?

Accepted Answer

jmod create --class-path out mymodule.jmod

Answer

jar --create --file mymodule.jmod

Answer

jlink --create mymodule.jmod

Answer

javac --module-output mymodule.jmod

Question 7

What does `--patch-module =` allow you to do at runtime?

Accepted Answer

Inject additional classes into a module without recompiling it

Answer

Replace the entire module with a new JAR

Answer

Add exports to a module dynamically

Answer

Increase the memory allocated to a module