MCQOPTIONS
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MCQOPTIONS
This section includes 10 Mcqs, each offering curated multiple-choice questions to sharpen your Operating System Questions & Answers Virtual Memory Demand Paging knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
When the page fault rate is low ____________ |
| A. | the turnaround time increases |
| B. | the effective access time increases |
| C. | the effective access time decreases |
| D. | turnaround time & effective access time increases |
| Answer» D. turnaround time & effective access time increases | |
| 2. |
If the memory access time is denoted by ma and p is the probability of a page fault (0 <= p <= 1). Then the effective access time for a demand paged memory is ____________ |
| A. | p x ma + (1-p) x page fault time |
| B. | ma + page fault time |
| C. | (1-p) x ma + p x page fault time |
| D. | none of the mentioned |
| Answer» D. none of the mentioned | |
| 3. |
When a page fault occurs, the state of the interrupted process is ____________ |
| A. | disrupted |
| B. | invalid |
| C. | saved |
| D. | none of the mentioned |
| Answer» D. none of the mentioned | |
| 4. |
The valid invalid bit, in this case, when valid indicates? |
| A. | the page is not legal |
| B. | the page is illegal |
| C. | the page is in memory |
| D. | the page is not in memory |
| Answer» D. the page is not in memory | |
| 5. |
Using a pager ____________ |
| A. | increases the swap time |
| B. | decreases the swap time |
| C. | decreases the swap time & amount of physical memory needed |
| D. | increases the amount of physical memory needed |
| Answer» D. increases the amount of physical memory needed | |
| 6. |
Segment replacement algorithms are more complex than page replacement algorithms because ____________ |
| A. | Segments are better than pages |
| B. | Pages are better than segments |
| C. | Segments have variable sizes |
| D. | Segments have fixed sizes |
| Answer» D. Segments have fixed sizes | |
| 7. |
The ability to execute a program that is only partially in memory has benefits like ____________ |
| A. | The amount of physical memory cannot put a constraint on the program |
| B. | Programs for an extremely large virtual space can be created |
| C. | Throughput increases |
| D. | All of the mentioned |
| Answer» E. | |
| 8. |
Error handler codes, to handle unusual errors are ____________ |
| A. | almost never executed |
| B. | executed very often |
| C. | executed periodically |
| D. | none of the mentioned |
| Answer» B. executed very often | |
| 9. |
The instruction being executed, must be in ____________ |
| A. | physical memory |
| B. | logical memory |
| C. | physical & logical memory |
| D. | none of the mentioned |
| Answer» B. logical memory | |
| 10. |
Virtual memory allows ____________ |
| A. | execution of a process that may not be completely in memory |
| B. | a program to be smaller than the physical memory |
| C. | a program to be larger than the secondary storage |
| D. | execution of a process without being in physical memory |
| Answer» B. a program to be smaller than the physical memory | |