To enter the field name, simply type it, then press the ______ key.

When a thread that owns a lock invokes method release, the lock enters the________state.

a) unlocked. b) running. c) ready. d) None of the above.

A sequence of plaintext elements is replaced by a __________ of that sequence which means that no elements are added, deleted or replaced in the sequence, but rather the order in which the elements appear in the sequence is changed.

A) ?permutation B) ?diffusion ? C) ?stream ? D) ?substitution