11 questions found
_______ refers to a situation in which a process is ready to execute but is continuously denied access to a processor because of other process getting priority.
Which of the following are correct ?
(1) A process is said to be thrashing if it is spending more time in paging than in execution.
(2) The scheme is pure demand paging when it brings a page in to memory even if it not required.
(3) An optimal page replacement algorithm suffers from Belady's anomaly.
(4) The virtual address space of a process refers to the logical view of how a process in stored in memory.
Choose the correct answer from the options given below:
An address generated by the CPU is commonly referred to as :-
Which of the following is an example of non-preemptive scheduling?
The first-fit and best-fit strategies for memory allocation suffers from ________.
Match the LIST-I with LIST-II
| LIST-I Operating system | LIST-II Key features |
|---|---|
| A. DOS | I. Single user - command line interface. |
| B. UNIX | II. Multiuser, multitasking, fork (). |
| C. Windows | III. GUI based multitasking. |
| D. Mac OS | IV. Unix based graphical OS. |
Choose the correct answer from the options given below:
Match the LIST-I with LIST-II
| LIST-I Page replacement algorithm | LIST-II Description |
|---|---|
| A. FIFO | I. Oldest page replaced |
| B. LRU | II. least recently used page replaced |
| C. Optimal | III. Replaces page not used for longest period of time |
| D. LFU | IV. Page with the smallest frequency access count be replaced |
Choose the correct answer from the options given below:
Arrange the following steps in correct order for the safety Algorithm used in the Banker's Algorithm to check whether the system is in safe state.
A. Find a process whose need work and which has Finish == false.
B. If such a process is found, set and Finish = true.
C. If all processes have Finish = true, the system is in a safe state
D. Initialize two vectors. and Finish = false for all i.
Choose the correct answer from the options given below:
Sequence the following with respect to different levels of file system from lowest to highest.
A. Devices
B. Application Programs
C. I/O control
D. logical file system
E. Basic file system and file organization module
Choose the correct answer from the options given below:
Which of the following are the fundamental models of inter process communication for co operating process?
A. Message passing
B. Shared memory
C. Context switch
D. Schedulers
Choose the correct answer from the options given below:
Option Orientation : Vertical
Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R
Assertion A: The mutual-exclusions condition of deadlock must hold for non-sharable resources.
Reason R: Printer cannot be simultaneously shared by several processes.
In the light of the above statements, choose the most appropriate answer from the options given below
