In a database, ________ is a vertical column that stores information that describes a record

The difference between the operator! member function and the operator void* member function is that:

a. They always return opposite boolean values. b. They occasionally return opposite boolean values. c. Of the two member functions, only operator! checks if eof has been set. d. Of the two member functions, only operator void* checks if eof has been set.

With ____________________, you can insert and remove a device while the computer is running.

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