An unusual advertisement on your computer screen that pops up is usually caused by ________

Malware is software designed to infiltrate a computer system without the users consent

Indicate whether the statement is true or false

To test whether a character is one of ‘0’, ‘1’, ‘2’, ‘3’, ‘4’, ‘5’, ‘6’, ‘7’, ‘8’, or ‘9’, use the _______ standard library function.

a. isnumber b. isnotalpha c. isnumeric d. isdigit e. all of the above