A.public abstract void walk();

B.private void walk(){}

C.abstract void walk();

D.void walk(){}

E.protected void walk(){}

A.prefix+name

B.prefix+Test.name

C.Test.prefix+Test.getName()

D.new Test().prefix+new Test().name

E.Test.prefix+Test.name

F.Test.getName+prefix

A.It throws IllegalMonitorStateException.

B.It is subject to deadlock.

C.The code does not compile.

D.It is subject to livelock.

A.Option B

B.Option D

C.Option A

D.Option C

A.4

B.3

C.An exception is thrown at runtime.

D.5