JAVA Quiz

1. Who invented Java Programming?

• a) Guido van Rossum

• b) James Gosling

• c) Dennis Ritchie

• d) Bjarne Stroustrup

2. Which component is used to compile, debug and execute the java programs?

• a) JRE

• b) JIT

• c) JDK

• d) JVM

3. What will be the output of the following Java code?

1.     class increment {

2.         public static void main(String args[])

3.         {       

4.              int g = 3;

5.              System.out.print(++g * 8);

6.         }

7.     }

• a) 32

• b) 33

• c) 24

• d) 25

4. Which of the following is not an OOPS concept in Java?

• a) Polymorphism

• b) Inheritance

• c) Compilation

• d) Encapsulation

5. What is not the use of “this” keyword in Java?

• a) Referring to the instance variable when a local variable has the same name

• b) Passing itself to the method of the same class

• c) Passing itself to another method

• d) Calling another constructor in constructor chaining

6. What will be the error in the following Java code?

    byte b = 50;

    b = b *50;

• a) b cannot contain value 50

• b) b cannot contain value 100, limited by its range

• c) No error in this code

• d) operator has converted b 50 into int, which can not be converted to byte without casting

7. What will be the output of the following Java program?

1.     class evaluate

2.     {

3.         public static void main(String args[])

4.         {

5.             int a[] = {1,2,3,4,5};

6.     int d[] = a;

7.     int sum = 0;

8.     for (int j = 0; j < 3; ++j)

9.                 sum += (a[j] * d[j + 1]) + (a[j + 1] * d[j]);

10.           System.out.println(sum);

11.        }

    }

• a) 38

• b) 39

• c) 40

• d) 41

8.What will be the output?

public class A {

public static void main(String[] args)

{

if (true){

System.out.println("Hello");

break;

}

System.out.println("World");

}

}

• a) Nothing

• b) Error

• Hello

• Hello

  World

9. What will be the output of the following Java program?

1.     class dynamic_initialization

2.     {

3.         public static void main(String args[])

4.         {

5.             double a, b;

6.             a = 3.0;

7.             b = 4.0;

8.     double c = Math.sqrt(a * a + b * b);

9.     System.out.println(c);

10.        }

11.    }

• a) 5.0

• b) 25.0

• c) 7.0

• d) Compilation Error

10. What will be the output of the following Java code?

1.     class Output

2.     {

3.          public static void main(String args[])

4.          {

5.              double x = 3.14; 

6.              int y = (int) Math.ceil(x);

7.              System.out.print(y);

8.          }

9.     }

• a) 3

• b) 0

• c) 4

• d) 3.0