Which of the following refers to an electricity mains supply that drops below a certain voltagelevel?

$($a$)$whiteout

$($b$)$brownout

$($c$)$blackout

$($d$)$surge

$2.$Which type of virus replicates itself over and over, both in RAM and on the hard disk, until thesystem becomes so overloaded that it can no longer operate correctly?

$($a$)$Worm

$($b$)$Time bomb

$($c$)$Logic bomb

$($d$)$Trojan horse

$3.$Which one of the following protocols is primarily used for transferring files across the Internet?

$($a$)$FTP

$($b$)$HTTP

$($c$)$TCP$/$IP

$($d$)$NetBUI

$4.$Which one of the following should you use for creating a Web page?