1. Viruses

are usually spread by users downloading viral programs from public bulletin boards or exchanging floppy disks containing an infection

are beneficial for program

both (a) and (b)

none of these

2. In one time password

the password is different in each instance

the password is same in each instance

both (a) and (b)

none of these

3. Viruses

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

4. The most common approach to authenticating a user identity is

user passwords

user log in

hardware device

none of these

5. Boot strap or vector is called

grappling hook program

main program

secondary program

primary storage

6. A major security problem for operating system is

authentication problem

physical problem

human problem

none of these

7. Real-time displays

are used only for capacity planning

are most useful for showing performance problems

are useless for capacity planning

cannot show the system paging rate

8. Global locks

synchronize access to local resources

synchronize access to global resources

are used to avoid local locks

prevent access to global resources

9. Control-unit busy

is the same as device busy

shows the availability of the path of devices

can be prevented with more devices

can be prevented by reducing the paging rate

10. A long-term process display should

show which processes used the most processor time

show process activity by time interval

show resources used by the most active processes

all of these