MCQOPTIONS
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MCQOPTIONS
This section includes 20 Mcqs, each offering curated multiple-choice questions to sharpen your Operating System knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Which technique is used to temporarily removing non-active programs from the memory of computer system? |
| A. | Swapping |
| B. | Spooling |
| C. | Scheduler |
| D. | None of the above. |
| Answer» B. Spooling | |
| 2. |
Which scheduler performs the "swapping out" or "swapping in"? |
| A. | Long-term scheduling |
| B. | Medium-term scheduling |
| C. | Short-term scheduling |
| D. | None of the above. |
| Answer» C. Short-term scheduling | |
| 3. |
Poor response time is usually caused by |
| A. | Process busy |
| B. | High I/O rates |
| C. | High paging rates |
| D. | Any of the above |
| Answer» E. | |
| 4. |
State true of false.i) With paging, each process is divided into relatively small, fixed-size pages.ii) Segmentation provides for the use of pieces of varying size. |
| A. | True, False |
| B. | True, True |
| C. | False, True |
| D. | False, False |
| Answer» C. False, True | |
| 5. |
Where does the swap space reside? |
| A. | Disk |
| B. | ROM |
| C. | RAM |
| D. | On - chip cache |
| Answer» B. ROM | |
| 6. |
Moving Process from main memory to disk is called |
| A. | scheduling |
| B. | caching |
| C. | swapping |
| D. | spooling |
| Answer» D. spooling | |
| 7. |
Which of the following is TRUE ? |
| A. | Overlays are used to increase the size of physical memory |
| B. | Overlays are used to increase the logical address space |
| C. | When overlays are used, the size of a process is not limited to the size of the physical memory |
| D. | Overlays are used whenever the physical address space is smaller than the logical address space |
| Answer» D. Overlays are used whenever the physical address space is smaller than the logical address space | |
| 8. |
Which of the following is / are the essential contents in each entry of a page table? |
| A. | Page frame number |
| B. | Virtual page number |
| C. | Access right information |
| D. | Both page frame number and virtual page number |
| Answer» B. Virtual page number | |
| 9. |
Locality of reference implies that the page reference being made by a process |
| A. | will always be to the page used in the previous page reference. |
| B. | will always be to the page used in the previous page reference. |
| C. | will always be to one of the pages existing in memory. |
| D. | will always lead to a page fault. |
| Answer» B. will always be to the page used in the previous page reference. | |
| 10. |
The term ‘page traffic’ describes |
| A. | number of pages in memory at a given instant. |
| B. | number of papers required to be brought in at a given page request. |
| C. | the movement of pages in and out of memory. |
| D. | number of pages of executing programs loaded in memory. |
| Answer» D. number of pages of executing programs loaded in memory. | |
| 11. |
____________ is a technique of temporarily removing inactive programs from the memory of computer system |
| A. | Swapping |
| B. | Spooling |
| C. | Semaphore |
| D. | Scheduler |
| Answer» B. Spooling | |
| 12. |
Thrashing ________. |
| A. | Reduces page I/O |
| B. | Decreases the degree of multiprogramming |
| C. | Implies excessive page I/O |
| D. | Improve the system performance |
| Answer» D. Improve the system performance | |
| 13. |
Paging _________. |
| A. | solves the memory fragmentation problem |
| B. | allows modular programming |
| C. | allows structured programming |
| D. | avoids deadlock |
| Answer» B. allows modular programming | |
| 14. |
The problem of fragmentation arises in ________. |
| A. | Static storage allocation |
| B. | Stack allocation storage |
| C. | Stack allocation with dynamic binding |
| D. | Heap allocation |
| Answer» E. | |
| 15. |
Thrashing occurs ________. |
| A. | when excessive swapping takes place |
| B. | when you thrash your computer |
| C. | whenever deadlock occurs |
| D. | when no swapping takes place |
| Answer» B. when you thrash your computer | |
| 16. |
A high paging rate |
| A. | may cause a high I/O rate |
| B. | keeps the system running well |
| C. | is a symptom of too much processor activity |
| D. | always creates a slow system |
| Answer» B. keeps the system running well | |
| 17. |
_________ allocates the largest hole (free fragmant) available in the memory. |
| A. | Best Fit |
| B. | Worst Fit |
| C. | First Fit |
| D. | None of the above |
| Answer» C. First Fit | |
| 18. |
By which of following the problem of thrashing is significantly affected ? |
| A. | program size |
| B. | program structure |
| C. | primary storage |
| D. | secondary storage |
| Answer» C. primary storage | |
| 19. |
If the property of locality of reference is well pronounced in a program |
| A. | the number of page faults will be more |
| B. | the number of page faults will be less |
| C. | the number of page faults will same |
| D. | none of above |
| Answer» C. the number of page faults will same | |
| 20. |
Which of the following memory allocation scheme suffers from External fragmentation? |
| A. | Segmentation |
| B. | Pure demand paging |
| C. | Swapping |
| D. | Paging |
| Answer» B. Pure demand paging | |