operating system Practice Questions Answers Test with Solutions & More Shortcuts

Question : 26

In process management of UNIX system, which of the following process states are running states in respect of whether the process is executing in user or kernel mode

a) Ready to run (in memory) state

b) Ready to run (in swappe(D) state

c) Preempted state

d) A and C are true

Question : 27

Given three switch processes, when they occur match them (1) Clock Interrupt A- The processor encounters a virtual memory address reference for a word that is not in the main memory. (2) I/O Interrupt B- The operating system determines whether the currently running process has been executed for the maximum allowable time slice. (3) Memory fault C- The operating system determines the I/O action that occurs.

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

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

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

d) 1-C, 2-B, 3-A.

Question : 28

In UNIX process management, the user processes runs in

a) Kernel mode only

b) Kernel and user mode both

c) User mode only

d) None of these.

Question : 29

In micro kernel architecture following is false.

a) Intersection takes place only between adjacent layers.

b) Intersection takes place via micro kernel.

c) It supports portability.

d) It supports object-oriented operating system.

Question : 30

The MS-DOS an operating system supports

a) Single user process and multiple threads

b) Multiple user process and single thread

c) Single user process and single thread

d) Multiple user processes and multiple threads.