MCQOPTIONS
Saved Bookmarks
MCQOPTIONS
This section includes 14 Mcqs, each offering curated multiple-choice questions to sharpen your Microprocessors knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
A_CALL_INSTRUCTION_CAN_REFERENCE_ONLY_A_CODE_SEGMENT_DESCRIPTOR_WITH?$ |
| A. | DPL less privilege than CPL |
| B. | DPL equal privilege to CPL |
| C. | DPL greater privilege than CPL |
| D. | All of the mentioned |
| Answer» C. DPL greater privilege than CPL | |
| 2. |
The instruction that refers to only code segment descriptors with DPL equal to or less than the task CPL is$ |
| A. | CALL |
| B. | IRET |
| C. | ESC |
| D. | RET and IRET |
| Answer» E. | |
| 3. |
The_RPL_of_a_selector_that_referred_to_the_code_descriptor_must_have$ |
| A. | less privilege than CPL |
| B. | greater privilege than CPL |
| C. | equal privilege than CPL |
| D. | any privilege regarding CPL |
| Answer» D. any privilege regarding CPL | |
| 4. |
An exception is generated when |
| A. | privilege test is negative |
| B. | an improper segment is referenced |
| C. | referenced segment is not present in physical memory |
| D. | all of the mentioned |
| Answer» E. | |
| 5. |
The data segment access refers to |
| A. | loading DS |
| B. | loading ES |
| C. | loading SS |
| D. | all of the mentioned |
| Answer» E. | |
| 6. |
When_a_JUMP_instruction_references_a_Task_State_Segment(TSS)_descriptor,_then_DPL_must_be |
| A. | equally privileged as CPL |
| B. | greater or equally privileged than CPL |
| C. | less or equally privileged than CPL |
| D. | less privileged than CPL |
| Answer» D. less privileged than CPL | |
| 7. |
The task requesting an access to a descriptor is allowed to access after checking th? |
| A. | type of descriptor |
| B. | privilege level |
| C. | type of descriptor and privilege level |
| D. | corresponding segment |
| Answer» D. corresponding segment | |
| 8. |
The effective privilege level is |
| A. | maximum numeric of RPL and CPL |
| B. | minimum privilege of RPL and CPL |
| C. | numeric minimum and privilege maximum of RPL and CPL |
| D. | none of the mentioned |
| Answer» D. none of the mentioned | |
| 9. |
The selector RPL that uses a less trusted privilege than the current privilege level for further use is known as |
| A. | Least task privilege level |
| B. | Descriptor privilege level |
| C. | Effective privilege level |
| D. | None of the mentioned |
| Answer» D. None of the mentioned | |
| 10. |
A task with privilege level 0, doesn’t refer to all the lower level privilege descriptors in$ |
| A. | GDT (global descriptor table) |
| B. | LDT (local descriptor table) |
| C. | IDT (interrupt descriptor table) |
| D. | None of the mentioned |
| Answer» C. IDT (interrupt descriptor table) | |
| 11. |
The data segments defined in GDT (global descriptor table) and the LDT (local descriptor table) can be accessed by a task with |
| A. | privilege level 0 |
| B. | privilege level 1 |
| C. | privilege level 2 |
| D. | privilege level 3 |
| Answer» B. privilege level 1 | |
| 12. |
Once the CPL is selected, it can be changed by |
| A. | hold |
| B. | transferring control using system descriptors |
| C. | transferring control using gate descriptors |
| D. | transferring control using interrupt descriptors |
| Answer» D. transferring control using interrupt descriptors | |
| 13. |
The task privilege level at the instant of execution is called |
| A. | Descriptor privilege level (DPL) |
| B. | Current privilege level (CPL) |
| C. | Effective privilege level (EPL) |
| D. | None of the mentioned |
| Answer» C. Effective privilege level (EPL) | |
| 14. |
By using privilege mechanism the protection from unauthorized accesses is done to |
| A. | operating system |
| B. | interrupt handlers |
| C. | system software |
| D. | all of the mentioned |
| Answer» E. | |