Java OOPs Quiz - Part 1 | Core Java

Test your coding prowess in our Ultimate Programming Java OOPs Quiz - Part 1 with Total 10 Questions.

Whether you're a seasoned developer or just dipping your toes into the programming world, challenge yourself with a range of questions spanning languages like Python, Java, and more.

Are you ready to conquer the coding conundrums? Put on your thinking hat and dive into the quiz now!

Name

Email

1.

Which of the following is an object encapsulated inside the System class?

out

println

Both A and B

None of the above

2.

___ is used as a base class to derive specific classes of the same kind.

superclass

abstract class

private

friend class

3.

Which of the following class has empty methods:

Nested class

Anonymous class

Adapter class

None of the above

4.

Which of these is correct way of inheriting class A by class B?

class B extends class A {}

class B + class A {}

class B inherits class A {}

class B extends A {}

5.

What will be the output of the following Java code?

class Output      {
        public static void main(String args[])
        {
             Object obj = new Object();
      System.out.print(obj.getclass());
        }
    }

java.lang.Object

class Object

class java.lang.Object

Error

6.

A program which shows an example of

class Student{  int id;
 String name;
}
 
class MainStudent{  
 public static void main(String args[]){
  Student s1 = new Student();
  s1.id=100;
  s1.name="Sadiq";
  System.out.println(s1.id+" "+s1.name);
 }
}

initialization by constructor

initialization by reference variable

initialization by method

None

7.

What is an anonymous object in Java?

An object with static methods

An object with final properties

An object with no reference

All of the above

8.

Which polymorphism behavior do you see in below class?

class Paint {  // all methods have same name
 public void Color(int x) {
 }
 
 public void Color(int x, int y) {
 }
 
 public void Color(int x, int y, int z) {
 }
}

Run time polymorphism

Constructor overloading

Method overriding

Method overloading

9.

Whose car will be called in the following program?

 class Father {  
 public void car() {
  System.out.println("Father's Car");
 }
}
 
class Son extends Father {
 
 public void car() {
  System.out.println("Son's Car");
 }
}
 
public class Sample {
 
 public static void main(String[] args) {
 
  Son john = new Son();
  john.car();
 }
 
}