A.null

B.A NoSuchElementException is thrown at run time.

C.Duke

D.A NullPointerException is thrown at run time.

A.compilation error

B.0 5

C.6 13

D.5 12

A.Message from Copier: Attempt00

B.A compilation error is thrown.

C.Message from Abstract Copier: Attempt00

D.A runtime error is thrown.

A.protected void walk(){}

B.private void walk(){}

C.abstract void walk();

D.public abstract void walk();

E.void walk(){}

A.Hello WorldHello World

B.An exception is thrown at runtime.

C.Hello World Hello World

D.HelloHello WorldHelloWorld

E.Hello WorldHelloWorld