MCQOPTIONS
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MCQOPTIONS
This section includes 11 Mcqs, each offering curated multiple-choice questions to sharpen your Microprocessors knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
THE_SIZES_OF_INSTRUCTION_AND_DATA_POINTER_REGISTERS_OF_80387_RESPECTIVELY_ARE?$ |
| A. | 32-bit, 32-bit |
| B. | 48-bit, 32-bit |
| C. | 32-bit, 48-bit |
| D. | 48-bit, 48-bit |
| Answer» E. | |
| 2. |
To inform 80387 that the CPU wants to communicate with NPS1, the NPS1 line is directly connected to$ |
| A. | A31 |
| B. | A30 |
| C. | M/IO |
| D. | D31 |
| Answer» D. D31 | |
| 3. |
The unit that is responsible for carrying out all the floating point calculations, allotted to the coprocessor by 80386, i? |
| A. | Central processing unit |
| B. | ALU |
| C. | FPU |
| D. | None of the mentioned |
| Answer» D. None of the mentioned | |
| 4. |
The unit that handles the data and directs it to either FIFO or instruction decoder depending on the bus control logic directive i? |
| A. | paging unit |
| B. | central processing unit |
| C. | segmentation unit |
| D. | data interface and control unit |
| Answer» E. | |
| 5. |
If the CKM pin of 80387 is high, then 80387 is operated in |
| A. | real address mode |
| B. | protected mode |
| C. | synchronous mode |
| D. | asynchronous mode |
| Answer» D. asynchronous mode | |
| 6. |
The instruction that is unable to set or read the VM (Virtual Mode) bit is |
| A. | PUSHF |
| B. | IRET |
| C. | POPF |
| D. | PUSHF and POPF |
| Answer» E. | |
| 7. |
The instructions to prepare the processor for protected mode can only be executed at the privilege level |
| A. | level 0 |
| B. | level 1 |
| C. | level 2 |
| D. | level 3 |
| Answer» B. level 1 | |
| 8. |
The privilege level at which the real mode programs are executed is |
| A. | level 0 |
| B. | level 1 |
| C. | level 2 |
| D. | level 3 |
| Answer» B. level 1 | |
| 9. |
The number of pages that the paging unit allows, in the virtual mode of 80386 is |
| A. | 64 |
| B. | 128 |
| C. | 256 |
| D. | 512 |
| Answer» D. 512 | |
| 10. |
The unit that is needed for virtual mode 80386, only to run the 8086 programs, which require more than 1 Mbyte of memory for memory management functions, is |
| A. | execution unit |
| B. | central processing unit |
| C. | paging unit |
| D. | segmentation unit |
| Answer» D. segmentation unit | |
| 11. |
If the 80386 enters the protected mode from the real address mode, then it returns back to the real mode, by performing the operation of |
| A. | read |
| B. | write |
| C. | terminate |
| D. | reset |
| Answer» E. | |