Operating Systems MCQ Set 5

1. The …………….. policy segments the disks request queue into sub queues of the length N.

A) SCAN

B) C-SCAN

C) N-Step SCAN

D) FSCAN

 2. Which of the following are the functions of operating system?

i) recovering from errors                              ii) facilitating input/output

iii) facilitating parallel operation                 iv) sharing hardware among users

v) implementing user interface

A) i, ii, ii, and v only

B) i, ii, iii, and iv only

C) ii, iii, iv and v only

D) All i, ii, iii, iv and v

3. File management function of the operating system includes

i) File creation and deletion                         ii) Disk scheduling

iii) Directory creation                                      iv) Mapping file in secondary storage.

A) i, ii and iii only

B) i, iii and iv only

C) ii, iii and iv only

D) All i, ii, iii and iv

4. The ……………. Determines when a page should be brought into main memory.

A) Fetch policy

B) Placement policy

C) Replacement policy

D) Resident set management

5. With …………………. A page is written out to secondary memory only when it has been selected for replacement.

A) pre-cleaning

B) demand cleaning

C) required cleaning

D) fast cleaning

6. …………………. Techniques can be used to resolve  conflicts, such as competition for resources, and to synchronize processes so that they can cooperate.

A) Mutual Exclusion

B) Busy Waiting

C) Deadlock

D) Starvation

7. ……………. Can be defined as the permanent blocking of a set of processed that either complete for system resources or communicate with each other.

A) Deadlock

B) Permanent lock

C) Starvation

D) Mutual exclusion

8. The following conditions of policy must be present for a deadlock to be possible.

i) Mutual exclusion                                          ii) Hold and wait

iii) No preemption                                           iv) Circular wait

A) i, ii and iii only

B) ii, iii and iv only

C) i, iii and iv only

D) All i, ii, iii and iv

9. A direct method of deadlock prevention is to prevent the occurrence of …………..

A) Mutual exclusion

B) Hold and wait

C) Circular waits

D) No preemption

 10. State true of false.

i) With paging, each process is divided into relatively small, fixed-size pages.

ii) Segmentation provides for the use of pieces of varying size.

A) True, False

B) True, True

C) False, True

D) False, False

Answers

1.c

2.d

3.b

4.a

5.b

6.a

7.a

8.d

9.c

10.b