1. Device busy

is good, since that means the device is in use

is bad, since that means the device is not available

is bad only if the device busy rate is too high

depends upon the system paging rate

2. A long-term monitor

should show any immediate performance problems

should show I/O, paging, and processor activity

need show only the I/O and processor activity

usually reports only on terminal displays

3. Link encryption

is more secure than end-to-end encryption

is less secure than end-to-end encryption

cannot be used in a large network

is used only to detect errors

4. Seeks analysis

is used for analyzing paging problems

is used for analyzing device busy problems

is used for analyzing control-unit busy problems

is only shown on real-time displays

5. Trojan-Horse programs

are legitimate programs that allow unauthorized access

are hacker programs that do not show up on the system

really do not usually work

usually are immediately discovered

6. Pre-emptive scheduling is the strategy of temporarily suspending a running process

before the CPU time slice expires

to allow starving processes to run

when it requests I/O

none of these

7. In Round Robin CPU scheduling, as the time quantum is increased, the average turn around time

increases

decreases

remains constant

varies irregularly

8. Which of the following refers to the associative memory?

Address of the data is generated by the CPU

Address of the data is supplied by the users.

There is no need for an address ie the data is used as an address

Data are accessed sequentially

9. Consider a logical address space of 8 pages of 1024 words mapped into memory of 32 frames. How many bits are there in the physical address?

9 bits

11 bits

13 bits

15 bits

10. Consider a logical address space of 8 pages of 1024 words mapped into memory of 32 frames. How many bits are there in the logical address?

9 bits

11 bits

13 bits

15 bits