operating system set 1 Detailed Explanation And More Example

Question : 1

Processor-bound tasks

a) use the processor more often

b) use more processor time

c) use less processor time

d) always take longer to execute

Question : 2

Which type of design problem in file system

a) how the file system should look to the user

b) algorithm and data structure must be created to map the logical file system onto the secondary storage device

c) Both A and B above

d) none of the above

Question : 3

Situations where two or more processes are reading or writing some shared data and the final result depends on who runs precisely which are called

a) race condition

b) critical sections

c) mutual exclusions

d) message passing

Question : 4

For file management, in file operations device drivers are

a) Disk drivers

b) Tape drivers

c) A and B both

d) None of these.

Question : 5

In memory management :A-Fixed allocation policy, B-Variable allocation policy: 1-It gives a process a fixed number of frames in main memory within which to execute. 2-It allows the number of page frames allocated to a process to be varied over the life time of the process. 3-In it a number of allocated frames are decided at initial load time.

a) A - 1, 3, B - 2

b) A - 1, B - 3

c) A - 2, B - 1, 3

d) A - 1, 2, B - 3

Question : 6

Semaphores

a) are used to do I/O

b) Synchronize critical resources to prevent contention

c) synchronize critical resources to prevent deadlock.

d) allow processes to communicate with one another.