Use JavaScript's built-in isNumber() function to determine whether the user actually entered a number.

The buffer overflow type of attack has been known since it was first widely used by the __________ Worm in 1988.

A. Code Red B. Slammer C. Morris Internet D. Alpha One

Which statement is true?

a) The do … while iteration statement is an alternate notation for the while iteration statement; these statements function identically. b) The do … while iteration statement tests the loop-continuation condition before the loop body is performed. c) The loop body of a correct do … while iteration statement is al-ways executed at least once. d) The braces delineating the body of a do … while statement are always required.