JavaDemo1

Which one of these lists contains only Java programming language keywords?

• 
  class, if, void, long, Int, continue

• 
  goto, instanceof, native, finally, default, throws

• try, virtual, throw, final, volatile, transient

• strictfp, constant, super, implements, do

Which is a valid keyword in java?

• interface

• string

• Float

• unsigned

Which is a valid declarations of a String?

• String s2 = 'null';

• String s1 = null;

• String s3 = (String) 'abc';

• String s4 = (String) '\ufeed';

What is the output of the following code:
class Test {

    public static void main(String[] args) {

    for(int i = 0; 1; i++) {

             System.out.println("Hello");

            break;

        }

    }

}

• Prints Hello once

• Prints Hello infinite times

• Prints nothing

• Compiler error

What is the output of the following code?
class Test {

    public static void main(String[] args) {

        for(int i = 0; 1; i++) {

            System.out.println("Hello");

            break;

        }

    }

}

• 0

• 20

• Compiler Error

• Prints Nothing

What is the output of the following code?
class Main {

public static void main(String args[]) {

try {

throw 10;

}

catch(int e) {

System.out.println("Got the Exception " + e);

}

}

}

• Got the Exception 10

• Got the Exception 0

• Compiler error

• None of these

7. What will be the output of the following?
   class Main

   {public static void main (String[] args) {

   try

   {

   int x = 0;

   int y = 5 / x;

   }

   catch (Exception e)

   {

   System.out.println("Exception");

   }

   catch (ArithmeticException ae)

   {

   System.out.println(" Arithmetic Exception");

   }

   System.out.println("finished");

   }};

• finished

• Compilation error

• Exception

• Arithmetic exception

8. What is the output of the following code?
   class Main

   {public static void main (String[] args) {

   try

   {

   int x = 0;

   int y = 5 / x;

   }

   catch (ArithmeticException ae)

   {

   System.out.println(" Arithmetic Exception");

   }

   catch (Exception e)

   {

   System.out.println("Exception");

   }

   System.out.println("finished");

   }

   };

• Exception
  finished

• Arithmetic Exception
  finished

• Compiler error

• finished

You need to store elements in a collection that guarantees that no duplicates are stored and all elements can be accessed in natural order. Which interface provides that capability?

• 
  java.util.Map

• 
  java.util.Set

• 
  java.util.List

• 
  java.util.Collection

What package is a part of the wrapper class which is imported by default into all Java programs?

• java.util
• java.lang
• java.io
• java.awt