In addition to text-only chats, people in the 1990s used their Web browsers to visit a virtual ____ room, where they could send text-only messages to other users in the room.

Which of the following will not increment c by 1?

a. c + 1; b. c++; c. ++c; d. c += 1;

The compression function used in secure hash algorithms falls into one of two categories: a function specifically designed for the hash function or an algorithm based on a ___________ .

Fill in the blank(s) with the appropriate word(s).