A set of characters at the end of a file name that helps Windows Vista determine what program should open the file is called the ________

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

1. The regular expressions [0-9] and \d are identical. 2. The regular expression x* matches the letter x followed by any characters. 3. Smart pointers help the programmer by deleting dynamic variables automatically when the variables are no longer used.

Let a and b be valid boolean expressions. Which of the following best describes the result of the expression a || b?

a) It will evaluate to true if a evaluates to true and b evaluates to true. It will evaluate to false otherwise. b) It will evaluate to false if a evaluates to false and b evaluates to false. It will evaluate to true otherwise. c) It will evaluate to true if a evaluates to false and b evaluates to false. It will evaluate to true otherwise. d) It will evaluate to true if a evaluates to false or b evaluates to false. It will evaluate to true otherwise. e) None of the above statements correctly describes the evaluation of the expression.