1Z0-819 Modules System 4

Question 1

What is the correct location for module-info.java in a standard Maven project layout?

Accepted Answer

src/main/java/module-info.java at the root of the source tree

Answer

module-info.java lives at the root of the module's source tree, directly in src/main/java for Maven projects.

Question 2

Which statement correctly describes an automatic module's readability?

Accepted Answer

An automatic module reads all other named modules and the unnamed module

Answer

Automatic modules have unrestricted readability — they read every module on the module path plus the unnamed module, enabling legacy code to work.

Question 3

What is the effect of passing '--module-source-path' to javac?

Accepted Answer

It enables multi-module compilation by specifying the root of multiple module source trees

Answer

'--module-source-path' enables javac to compile multiple modules simultaneously by specifying the directory that contains each module's source folder.

Question 4

Which 'opens' syntax in module-info.java opens a package to ALL other modules for deep reflection?

Accepted Answer

opens com.example.internal;

Answer

An 'opens' directive without a 'to' clause makes the package open for deep reflection to all modules.

Question 5

What does 'requires static com.example.annotation;' mean in module-info.java?

Accepted Answer

The dependency is required at compile time but optional at runtime

Answer

'requires static' declares a compile-time-only dependency; the module is not required to be present at runtime.

(1Z0-819) Oracle Java SE 11 Developer Practice Test

(1Z0-819) Oracle Java SE 11 Developer Practice Test

1Z0-819 Modules System 4