IT A OOPs Lab Quiz1

What will be the output of the following Java code?

class increment {

public static void main(String args[])

 { 

            int g = 3;

 System.out.print(++g * 8);

}

}

• 32
  
  

• 33

• 24

• 25

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

• Polymorphism
  
  

• Inheritance
  
  

• Compilation

• Encapsulation

class Output

    {

        public static void main(String args[])

        {

            int arr[] = {1, 2, 3, 4, 5};

            for ( int i = 0; i < arr.length - 2; ++i)

                System.out.println(arr[i] + " ");

        }

    }

• 1 2 3 4 5
  
  

• 1 2 3 4
  
  

• 1 2

•     1 2 3

What is the extension of compiled java classes?

• .txt
  
  

• .js
  
  

• .class
  
  

• .java

What will be the output of the following Java program?

class recursion

        {

 int func (int n)

        {

        int result;

        if (n == 1)

                return 1;

            result = func (n - 1);

            return result;

        }

    }

    class Output

    {

        public static void main(String args[])

        {

            recursion obj = new recursion() ;

            System.out.print(obj.func(5));

        }

    }

• 1

• 120

•  0

• ) None of the mentioned

What will be the output of the following Java code?

    class output

    {

        public static void main(String args[])

        {

           String c = "Hello i love java";

           boolean var;

           var = c.startsWith("hello");

           System.out.println(var);

        }

    }

• 0

•  true

• 1

• false

What will be the output of the following Java program?

    class output

    {

        public static void main(String args[])

        {

           StringBuffer s1 = new StringBuffer("Quiz");

           StringBuffer s2 = s1.reverse();

           System.out.println(s2);

        }

    }

• QuizziuQ
  
  

• ziuQQuiz
  
  

• Quiz
  
  

• ziuQ

What will be the output of the following Java program?

class Output

    {

         public static void main(String args[])

        {

            double x = 2.0; 

            double y = 3.0;

            double z = Math.pow( x, y );

            System.out.print(z);

        }

    }

• 9.0

• 8.0

• 4.0

• 2.0

Which of these method of String class is used to obtain character at specified index?

• char()

• Charat()
  
  

• charat()

• charAt()

What will be the output of the following Java program?

    class string_class

    {

        public static void main(String args[])

        {

            String obj = "I LIKE JAVA";  

            System.out.println(obj.charAt(3));

        }

    }

•  I

•  L

• K

• E