Keyword _____________ specifies that an object or variable is not modifiable.

Which of the following was not a feature of cash registers in the early 1900s?

a. Ability to compute total of purchases b. Ability to print itemized receipts for customers c. Ability to print log of transactions for owners d. Ability to compute amount of change to give customer e. Ability to ring a bell every time cash drawer is opened

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.