operating system Practice Questions Answers Test with Solutions & More Shortcuts

Question : 26

Data from and to magnetic disk is transformed in

a) Continuation

b) Blocks

c) Block and Continuation both

d) None of these.

Question : 27

In system buffer cache, used in UNIX, following not true

a) It is a disk cache

b) It is not a disk cache

c) Data transfer between buffer cache and user process space always occurs using DMA.

d) I/O operations with disk are handled through buffer code.

Question : 28

The amount of memory (in bytes) required for a block bitmap is

a) Disk size x 8

b) Disk size/ (8 x file system block size)

c) File system block size/disk size

d) None of these.

Question : 29

In real time scheduling: A: Static table driven approach, B: Static priority driven preemptive approach, C: Dynamic planning based approach; 1- A static analysis of feasible scheduler of dispatching is done and implemented. 2- A static analysis of feasible schedules of dispatching is done and assigns priorities to tasks. 3- Feasibility is determined at run time.

a) A - 1, B - 2, C - 3

b) A - 2, B - 3, C - 1

c) A - 3, B - 1, C - 2

d) None of these.

Question : 30

In multi processor scheduling, independent parallelism indicates

a) There is synchronization among processes at gross level.

b) There is no explicit synchronization among processes.

c) A parallel processing or multi tasking is done within a single application.

d) None of these.