“To subtract one number from another, take the twos complement of the subtrahend and add it to the minuend” is the _________ rule.

Which of the following is the better choice when attempting to add a new entry to a dictionary where the search key already exists?

a. replace the existing entry with a new entry b. crash the program c. throw an exception d. deny the attempt

The top-level node in a TreeView is the_______ node.

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