are used only for capacity planning

are most useful for showing performance problems

are useless for capacity planning

cannot show the system paging rate

authentication problem

physical problem

human problem

none of these

grappling hook program

main program

secondary program

primary storage

user passwords

user log in

hardware device

none of these

another form of computer attack is virus

virus are designed to spread into other programs and can wreak havoc in a system

it modifying or destroying files and causing system crashes and program malfunctions

all of these