Question { 19363 }

What are null interfaces in JAVA ? and give me some
examples?

Answer

null interface is such which have no abstract methods
declaration in interface definition. For Ex. Clonable
interface.

Question { 6826 }

Name the types of mouse event listeners ?

Answer

MouserListener
MouseMotionListener

Question { Mind Tree, 103331 }

why java does not support multiple inheritance

Answer

Basically multiple inheritance is useful only in
polymorphism, so in java it can be done by interfaces, so
that java doesn't need to provide multiple inheritance
using extends keyword.

Question { CTS, 12770 }

what is the replacement for GOTO in java?

Answer

break with label and continue with label.
1. Break with label
loop1: for (int i = 0; i < 10; i++)
{
loop2: for ( int j = 0; j < 10; j++)
{
System.out.println(i);
if( i + j > 10 )
break loop1;
}
}

2. continue with label

loop1: for (int i = 0; i < 10; i++)
{
loop2: for ( int j = 0; j < 10; j++)
{
if(i + j == 5)
continue loop1;
System.out.println(j);
}
}

Question { IBM, 18909 }

wHAT IS DEFAULT SPECIFIER IN JAVA
wHAT IS DEFAULT CONSTRUCTOR IN JAVA
wHAT IS DEFAULT METHOD IN JAVA

Answer

Default Specifier is : friendly. but there is no keyword
provided by java

Default Construtor is : the constructor of top level super
class of each java class that is "Object" class.

Default Method is : main method that would called by
default through the java interpretor.

Question { Vector, 23492 }

main()
{
int ptr[] = {1,2,23,6,5,6};
printf("%d",&ptr[3]-&ptr[0]);
}

Answer

6