QUIZ - JAVA CLASSES/OBJECTS

What does OOP stand for?

• Operators Oriented Programming

• Output Operating Programming

• Object-Oriented Programming

• Outer Operating Programming

In simple words, what is OOP about?

• Creating objects that represents concepts with the help of attributes and methods

• Converting a smaller type to a larger type size

• Converting a larger type to a smaller size type

• Using single operators to create applications

What are the two main aspects of object-oriented programming?

• Operators and output methods

• Classes and Objects

• Templates and recursion

• Method overloading

True or False:
A Class is like a "blueprint" for creating objects.

• True

• False

Create a class called MyClass.

public class ______

What is the output of the following code?

int x = 25;

public static void main(String[] args) {
  Main myObj = new Main();
  System.out.println(myObj.x);
}

• 5

• 15

• 25

• 55

True or False:
A class must have a matching filename.

• True

• False

Use myObj to access and print the value of the x attribute of MyClass.

public class MyClass {

int x = 5;

public static void main(String[] args) {

MyClass myObj = new MyClass();

System.out.println(_____._); } }

What is the output of the following code?

int x;

public static void main(String[] args) {
  Main myObj = new Main();
  myObj.x = 40;
  System.out.println(myObj.x);
}

• Error

• 40

• myObj

• x

What is the output of the following code?

public class Main {
  static void myMethod() {
    System.out.println("Hello World!");
}

  public static void main(String[] args) {
    myMethod();
  }
}

• Error

• Hello World!

• myMethod()

• Main