An extra copy of a database is called a(n) ________ database

The command to use help features of Emacs is:

a: [Ctrl-h] b: [Ctrl-h] k c: [Ctrl-h] t d: [Ctrl-h] i e: all of the above

Flash memory has many moving parts, making it less durable and shock resistant than other types of media.

Answer the following statement true (T) or false (F)