The Oops moment/2

What does the new keyword do in Java?

• Deletes an object

• Copies an object

• Creates a new object

• Imports a class

Which of the following is a correct way to define an enum?

• enum Color = {Red, Green, Blue}

• enum Color {Red, Green, Blue}

• Color enum {Red, Green, Blue}

• enum(Color) => Red, Green, Blue

How do you access a private variable from outside the class?

• Use public keyword

• Use a getter or setter method

• Make it static

• Use a constructor

Which method returns a string representation of an object?

• show()

• print()

• toString()

• getInfo()

What does a constructor do in a class?

• Creates variables

• Destroys objects

• Initializes new objects

• Runs loops

Why are getter and setter methods commonly used in Java classes?

• To repeatedly execute blocks of code within loops defined in the class

• To safely retrieve and modify the values of private fields while maintaining encapsulation

• To automatically delete unused variables when the object is destroyed

• To bypass access modifiers and make all fields globally accessible

enum Size { SMALL, MEDIUM, LARGE }

public class Test {

public static void main(String[] args) {

Size s = Size.LARGE;

System.out.println(s);

}

}

• SMALL

• Size

• LARGE

• null

class User {

private String name = "Michelle";

}

public class Main {

public static void main(String[] args) {

User u = new User();

System.out.println(u.name);

}

}

• Line 2

• Line 4

• Line 7

• Line 6

class Item {

private int id;

public void Item(int i) {

id = i;

}

public int getId() {

return id;

}

}

• Constructor has wrong name

• Constructor is missing

• id should be public

• No main method

I am born every time you say “new,”
But I’m not a baby, just part of your crew.

I don’t return things — not even a void,
But without me, your object gets paranoid.

You can give me no args, or one, or two,
I dress your object in values fresh and new.

So tell me, coder, quick and slick:
Who am I that helps objects tick?