1Z0-819 Annotations 2

Question 1

Which meta-annotation specifies that an annotation should be recorded in the Javadoc output?

Accepted Answer

@Documented

Answer

@Documented causes the annotation to appear in the generated Javadoc for the annotated element.

Question 2

What does the @Inherited meta-annotation mean when applied to an annotation type?

Accepted Answer

Subclasses automatically inherit the annotation from their superclass

Answer

@Inherited causes a class-level annotation to be automatically inherited by subclasses if they do not explicitly annotate themselves.

Question 3

Which of the following is a valid annotation element default value declaration?

Accepted Answer

String name() default "";

Answer

Annotation element defaults must be constant expressions; an empty String literal is valid, but null and non-array/Class defaults have restrictions.

Question 4

What is a marker annotation?

Accepted Answer

An annotation with no elements

Answer

A marker annotation is an annotation type with no declared elements, used solely to mark a program element.

Question 5

Which ElementType constant allows an annotation to be placed on a formal parameter of a method?

Accepted Answer

PARAMETER

Answer

ElementType.PARAMETER targets method and constructor formal parameters.

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