Operating System Practice Test 9

Question 1 of 20

1. RAID level 5 is also known as ____________

block-interleaved parity organization

block-interleaved distributed parity

memory-style ECC organization

bit-interleaved parity organization

Question 1 of 20

Question 2 of 20

2. The magneto-optic head flies ___________ the disk surface than a magnetic disk head does.

none of the mentioned

at the same distance as

much closer to

much farther from

Question 2 of 20

Question 3 of 20

3. Access matrix model for user authentication contains _____________

a list of objects

all of the mentioned

a list of domains

a function which returns an object's type

Question 3 of 20

Question 4 of 20

4. Which principle states that programs, users and even the systems be given just enough privileges to perform their task?

principle of operating system

none of the mentioned

principle of least privilege

principle of process scheduling

Question 4 of 20

Question 5 of 20

5. Virtual memory uses disk space as an extension of _________

none of the mentioned

secondary storage

main memory

tertiary storage

Question 5 of 20

Question 6 of 20

6. Which two rights allow a process to change the entries in a column?

deny and copy

copy and transfer

copy and owner

owner and transfer

Question 6 of 20

Question 7 of 20

7. RAID level ____ spreads parity and data among all N+1 disks rather than storing data in N disks and parity in 1.

Question 7 of 20

Question 8 of 20

8. If the set of resources available to the process is fixed throughout the process's lifetime then its domain is _____________

static

none of the mentioned

dynamic

neither static nor dynamic

Question 8 of 20

Question 9 of 20

9. Which one of the following is capability based protection system?

both hydra and cambridge CAP system

hydra

cambridge CAP system

none of the mentioned

Question 9 of 20

Question 10 of 20

10. What are the three additional operations to change the contents of the access-matrix?

copy

control

Owner

all of the mentioned

Question 10 of 20

Question 11 of 20

11. Who can add new rights and remove some rights?

copy

owner

limited copy

transfer

Question 11 of 20

Question 12 of 20

12. In the _______ algorithm, the disk head moves from one end to the other, servicing requests along the way. When the head reaches the other end, it immediately returns to the beginning of the disk without servicing any requests on the return trip.

C-SCAN

SCAN

C-LOOK

LOOK

Question 12 of 20

Question 13 of 20

13. A single parity bit can be used for ____________

detection

all of the mentioned

few error corrections

multiple error corrections

Question 13 of 20

Question 14 of 20

14. The code segment that misuses its environment is called a _____________

code stacker

trojan horse

none of the mentioned

internal thief

Question 14 of 20

Question 15 of 20

15. _______ is an approach to restricting system access to authorized users.

None of the mentioned

Role-based access control

Job-based access control

Process-based access control

Question 15 of 20

Question 16 of 20

16. For most computers, the bootstrap is stored in ________

Tertiary storage

RAM

Cache

ROM

Question 16 of 20

Question 17 of 20

17. Multipartite viruses attack on _____________

files

all of the mentioned

boot sector

memory

Question 17 of 20

Question 18 of 20

18. RAID level 3 does not have _________ as in RAID level 1.

storage overhead

enough storage space for data

time consumption overhead

efficiency

Question 18 of 20

Question 19 of 20

19. When a fixed amount of swap space is created during disk partitioning, more swap space can be added only by?
I) repartitioning of the disk
II) adding another swap space elsewhere

both I and II

neither I nor II

only II

only I

Question 19 of 20

Question 20 of 20

20. What does the access matrix represent?

Rows-Access List, Columns-Domains

Rows-Domains, Columns-Access list

Rows-Objects, Columns-Domains

Rows-Domains, Columns-Objects

Question 20 of 20

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