A.The compilation succeeds.

B.The compilation fails due to an error in line 4.

C.The compilation fails due to an error in line 6.

D.The compilation fails due to an error in line 2.

E.The compilation fails due to an error in line 7.

F.The compilation fails due to an error in line 10.

G.The compilation fails due to an error in line 9.

A.Keys: 4 Values: 4 Map: 0

B.Keys: 0 Values: 0 Map:

C.Keys: 0 Values: 0 Map: 0

D.Keys: 4 Values: 4 Map: 4

E.The compilation fails.

A.Consumer consumer = msg -> { return System.out.print(msg); };

B.Consumer consumer = var arg > {System.out.print(arg);};

C.Consumer consumer = (String args) > System.out.print(args);

D.Consumer consumer = System.out::print;

A.Replace the lock constructor call with new ReentrantLock (true).

B.Make the declaration of lock static.

C.No change is required.

D.Move the declaration of lock inside the foo method.

A.Dr. Who

B.Dr. Null

C.An exception is thrown at runtime.

D.null