The Table Design window in OpenOffice Base is the window that enables data entry into a database table

A primary key:

a. Is required for all types of files. b. Should be unique. c. Is used in conjunction with a secondary key and is less important than the secondary key. d. Is the only field used to sort the records of a file.

Which statement is true of using files?

a. Files must be opened by the user before being used. b. Files must be closed by the user after being used. c. Files that are opened must be closed. d. All of the above. e. None of the above.