Quiz on Classes and Objects in Java

What is a class in Java?

Which keyword is used to create an object in Java?

What is the output of the following code?

class Box {
int width = 5;
}

public class Test {
public static void main(String[] args) {
Box b = new Box();
System.out.println(b.width);
}
}

What is an object in Java?

Which method is called automatically when an object is created?

Can a class contain multiple methods with the same name?

What is the correct way to declare a class named `Book`?

Which statement is true about constructors in Java?

What will happen if you don’t write a constructor in your class?

What is the output?

class Pen {
String color;
}

public class Main {
public static void main(String[] args) {
Pen p1 = new Pen();
p1.color = “Blue”;
System.out.println(p1.color);
}
}

How do you call a method from an object?

Which keyword refers to the current object inside a class method?

Can a class have multiple objects?

What happens when you assign one object to another?

A obj1 = new A();
A obj2 = obj1;

Which of the following can be members of a class?