Java Programming Mock Test 7

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

 
    class newthread implements Runnable
    {
	Thread t;
	newthread()
        {
	    t = new Thread(this,"My Thread");
	    t.start();
	}
	public void run()
        {
	    System.out.println(t);
	}
    }
    class multithreaded_programing
    {
        public static void main(String args[])
        {
            new newthread();        
        }
    }

2. What will happen if two thread of the same priority are called to be processed simultaneously?

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

 
    class exception_handling 
    {
        public static void main(String args[])
        {
            try 
            {
                throw new NullPointerException ("Hello");
                System.out.print("A");
            }
            catch(ArithmeticException e) 
            {
        	System.out.print("B");        	
            }
        }
    }

4. Which of these handles the exception when no catch is used?

5. Which of these class is related to all the exceptions that can be caught by using catch?

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

 
    class newthread extends Thread
    {
	Thread t;
	newthread()
        {
	    t = new Thread(this,"New Thread");
	    t.start();
	}
	public void run()
        {
	   System.out.println(t.isAlive());
	}
    }
    class multithreaded_programing
    {
        public static void main(String args[])
        {
            new newthread();        
        }
    }

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

 
    class newthread implements Runnable 
    {
	Thread t;
	newthread() 
        {
	    t = new Thread(this,"My Thread");
	    t.start();
	}
	public void run()
        {
	    System.out.println(t.getName());
	}
    }
    class multithreaded_programing
    {
        public static void main(String args[])
        {
            new newthread();        
        }
    }

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

 
    class exception_handling 
    {
        public static void main(String args[]) 
        {
            try 
            {
                System.out.print("A");
                throw new NullPointerException ("Hello");
            }
            catch(ArithmeticException e) 
            {
                System.out.print("B");        	
            }
        }
    }

9. Which of the following is a super class of all exception type classes?

10. Which of these interface declares core method that all collections will have?