Online Test

:

 

public class Test 
{ 
    public void foo() 
    {
        assert false; /* Line 5 */
        assert false; /* Line 6 */
    } 
    public void bar()
    {
        while(true)
        {
            assert false; /* Line 12 */
        } 
        assert false;  /* Line 14 */
    } 
}

What causes compilation to fail?

 


What will be the output of the program?

try 
{
    Float f1 = new Float("3.0");
    int x = f1.intValue();
    byte b = f1.byteValue();
    double d = f1.doubleValue();
    System.out.println(x + b + d);
}
catch (NumberFormatException e) /* Line 9 */
{
    System.out.println("bad number"); /* Line 11 */
}

What is the output of this program?

class main_class {
        public static void main(String args[])
        {
            int x = 9;
            if (x == 9) { 
                int x = 8;
                System.out.println(x);
            }
        } 
    }

class X2 
{
    public X2 x;
    public static void main(String [] args) 
    {
        X2 x2 = new X2();  /* Line 6 */
        X2 x3 = new X2();  /* Line 7 */
        x2.x = x3;
        x3.x = x2;
        x2 = new X2();
        x3 = x2; /* Line 11 */
        doComplexStuff();
    }
}

after line 11 runs, how many objects are eligible for garbage collection?


What is the output of this program?

class string_demo {
        public static void main(String args[])
        {
            String obj = "I" + "like" + "Java";   
            System.out.println(obj);     
        }
   }

What is the output of this program?

     class Output {
        public static void main(String args[]) {
            char a[] = {'a', '5', 'A', ' '};   
            System.out.print(Character.isDigit(a[0]) + " ");
            System.out.print(Character.isWhitespace(a[3]) + " ");
            System.out.print(Character.isUpperCase(a[2]));
        }
    }

What will be the output of the program?

String s = "hello"; 
Object o = s; 
if( o.equals(s) )
{
    System.out.println("A"); 
} 
else
{
    System.out.println("B"); 
} 
if( s.equals(o) )
{
    System.out.println("C"); 
} 
else
{ 
    System.out.println("D"); 
}
  1. A
  2. B
  3. C
  4. D

What is the output of this program?

   class Output {
        public static void main(String args[]) {
            Integer i = new Integer(257);  
            float x = i.floatValue();
            System.out.print(x);
        }
    }

What is the output of this program?

import java.net.*;
    class networking {
        public static void main(String[] args) throws UnknownHostException {
            InetAddress obj1 = InetAddress.getByName("techepi.com");
            InetAddress obj2 = InetAddress.getByName("techepi.com");
            boolean x = obj1.equals(obj2); 
            System.out.print(x);
        }
    }

What is the output of this program?

   class A {
        int i;
    }    
    class B extends A {
        int j;
        void display() {
            super.i = j + 1;
            System.out.println(j + " " + i);
        }
    }    
    class inheritance {
        public static void main(String args[])
        {
            B obj = new B();
            obj.i=1;
            obj.j=2;   
            obj.display();     
        }
   }

Which of the following statements is true?


What is the output of this program?

    class Output {
        public static void main(String args[]) {
            double x = 102;
            double y = 5;
            double z = Math.IEEEremainder(x, y);
            System.out.print(z);}
        }
    }

 

 

 


Which of these methods is used to get x coordinate of the mouse?


Which statement is true?


What is the output of this program?

  class string_class {
        public static void main(String args[])
        {
            String obj = "I LIKE JAVA";   
            System.out.println(obj.length());
        }
    }
 

About Us

TechEpi.com is an online learning website.We cover the latest tech news,online tutorials,blog,online test for Aptitude,C,Java,PHP to improve your knowledge.

Newsletter


Follow TechEpi on