${?}_{{?}_{{?}_{?}}{?}_{{?}_{?}}1.\text{s}\text{l}\text{e}\text{e}\text{p}\text{m}\text{o}\text{d}\text{e}}$

$(272)$

${?}_{{?}_{?}}{?}_{{?}_{?}}{?}_{2.}$ hibernate

$(272)$

${?}_{{?}_{?}}{?}_{{?}_{?}}{?}_{3.}$ virus $(288)$

${?}_{{?}_{?}}{?}_{{?}_{?}}{?}_{4.}$ worm $(288)$

${?}_{{?}_{?}}{?}_{{?}_{?}}{?}_{5.}$ spam $(289)$

$a.$ a potentially damaging computer program that affects, $or$ infects, a computer negatively $by$

altering the way the computer works without the user$s$ knowledge $or$ permission

$b.$ copies itself repeatedly using $up$ system resources and possibly shutting the system down

$c.$ saves any open documents and programs $to$ a hard disk before removing power from the

computer

$d.$ hides within $or$ looks like a legitimate program such $as$ a screen saver

$e.$ saves any open documents and programs $to$ RAM, turns off all unneeded functions, and then

places the computer $in$ a low$-$power state

$f.an$ unsolicited $e-$mail message $or$ newsgroup posting sent $to$ many recipients $or$ newsgroups $at$ once