Maven

Question 1

What is the purpose of the System.out.print("Hello world!"); line in the HelloWorld program?

a) It declares a method
b) It imports a library
c) It prints a message to the screen
d) It accepts user input

Answer 1

c) It prints a message to the screen

Question 2

What does the public keyword in a Java method declaration indicate?

a) It can only be accessed within the class
b) It can be accessed from inside and outside the class
c) It can only be accessed by subclasses
d) It is a private method

Answer 2

b) It can be accessed from inside and outside the class

Question 3

What is the effect of the --enable-preview flag when running a Java program?

a) It compiles the program faster
b) It enables the use of experimental features
c) It disables warnings
d) It optimizes runtime performance

Answer 3

b) It enables the use of experimental features

Question 4

What is the function of the maven-compiler-plugin in the pom.xml file?

a) It defines the name of the project
b) It manages project dependencies
c) It controls how the project is compiled
d) It sets the IDE settings for the project

Answer 4

c) It controls how the project is compiled

Question 5

In the new anonymous main class feature in Java 21, what is NOT removed from the method declaration?

a) The argument array
b) The static keyword
c) The method name
d) The return type

Answer 5

c) The method name

Question 6

In the HelloWorld example, why would a comment starting with // be used in the code?

a) To add executable instructions
b) To store metadata
c) To indicate a task for future implementation
d) To mark a line for deletion

Answer 6

c) To indicate a task for future implementation