question 18)

which of the following will compile without error?
 

1)

char c='1';
system.out.println(c>>1);

2)

integer i=integer("1");
system.out.println(i>>1);

3)

int i=1;
system.out.println(i<<<1);

4)

int i=1;
system.out.println(i<<1);

question 19)

which of the following are true?

1) a component may have only one event listener attached at a time
2) an event listener may be removed from a component
3) the actionlistener interface has no corresponding adapter class
4) the processing of an event listener requires a try/catch block
 

question 20)

which of the following are java keywords?

1) sizeof
2) main
3) transient
4) volatile

question 21)

which of the following statements are true?

1) the default constructor has a return type of void
2) the default constructor takes a parameter of void
3) the default constructor takes no parameters
4) the default constructor is not created if the class has any constructors of its own.