operating system

Question

1. Process are classified into different groups in a) shortest job scheduling algorithm b) round robin scheduling algorithm c) priority scheduling algorithm d) multilevel queue scheduling algorithm
2. Which one of the following cannot be scheduled by the kernel? a) kernel level thread b) user level thread c) process d) none of the mentioned
3. Round robin scheduling falls under the category of: a) Non preemptive scheduling b) Preemptive scheduling c) All of the mentioned d) None of the mentioned
4. What is the reusable resource? a) that can be used by one process at a time and is not depleted by that use b) that can be used by more than one process at a time c) that can be shared between various threads d) none of the mentioned
5. A file control block contains the information about a) file ownership b) file permissions c) location of file contents d) all of the mentioned 6. CPU fetches the instruction from memory according to the value of al program counter b) status register c) instruction register d) program status word
7. When the process issues an I/O request: a. It is placed in an I/O queue b. It is placed in a waiting queue. c. It is placed in the ready queue. d. It is placed in the job queue.
 8. What is a long-term scheduler? a. It selects which process has to be brought into the ready queue. b. It selects which process has to be executed next and allocates CPU. c. It selects which process to remove from memory by swapping. d. None of these.
 9. What is a medium-term scheduler? a. It selects which process has to be brought into the ready queue. b. It selects which process has to be executed next and allocates CPU. c. It selects which process to remove from memory by swapping.

Answer 1

1. (D) Multilevel queue scheduling algorithm.

The process is classified into different groups in a multilevel queue scheduling algorithm.

The multilevel queue scheduling algorithm is not an independent scheduling algorithm. It makes use of executing algorithms, such as the Round Robin algorithm, FCFS, and so on to group and schedule the jobs with common characteristics.

2. b) user level thread

3. b) Preemptive scheduling

4. (a) that can be used by one process at a time and is not depleted by that use

5. d) all of the mentioned 

6. c) instruction register

7. b. It is placed in a waiting queue.

8. a. It selects which process has to be brought into the ready queue.

9. c. It selects which process to remove from memory by swapping.