MCQOPTIONS
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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. |
The ROR instruction rotates the contents of the destination operand to |
| A. | left |
| B. | right |
| C. | left and then right |
| D. | right and then left |
| Answer» C. left and then right | |
| 2. |
The instruction that is used to convert the result of the addition of two packed BCD numbers to a valid BCD number is |
| A. | DAA |
| B. | DAS |
| C. | AAA |
| D. | AAS |
| Answer» B. DAS | |
| 3. |
The expansion of DAA is |
| A. | decimal adjust after addition |
| B. | decimal adjust before addition |
| C. | decimal adjust accumulator |
| D. | decimal adjust auxiliary |
| Answer» D. decimal adjust auxiliary | |
| 4. |
The instruction in which adjustment is made before performing the operation is |
| A. | AAA |
| B. | AAS |
| C. | AAM |
| D. | AAD |
| Answer» E. | |
| 5. |
Which of the following is a mnemonic? |
| A. | ADD |
| B. | ADC |
| C. | AAA |
| D. | ADD & ADC |
| Answer» D. ADD & ADC | |
| 6. |
The instruction that converts the result in an unpacked decimal digits is |
| A. | AAA |
| B. | AAS |
| C. | AAM |
| D. | All of the mentioned |
| Answer» E. | |
| 7. |
During comparison operation, the result of comparing or subtraction is stored in |
| A. | memory |
| B. | registers |
| C. | stack |
| D. | no where |
| Answer» E. | |
| 8. |
The instruction, CMP to compare source and destination operands it performs |
| A. | addition |
| B. | subtraction |
| C. | division |
| D. | multiplication |
| Answer» C. division | |
| 9. |
In general, the destination operand of an instruction can be |
| A. | memory location |
| B. | register |
| C. | immediate data |
| D. | memory location and register |
| Answer» E. | |
| 10. |
In general, the source operand of an instruction can be |
| A. | memory location |
| B. | register |
| C. | immediate data |
| D. | all of the mentioned |
| Answer» E. | |
| 11. |
The flag that acts as Borrow flag in the instruction, SBB is |
| A. | direction flag |
| B. | carry flag |
| C. | parity flag |
| D. | trap flag |
| Answer» C. parity flag | |
| 12. |
The instruction that enables subtraction with borrow is |
| A. | DEC |
| B. | SUB |
| C. | SBB |
| D. | None of the mentioned |
| Answer» D. None of the mentioned | |
| 13. |
The instruction that subtracts 1 from the contents of the specified register/memory location is |
| A. | INC |
| B. | SUBB |
| C. | SUB |
| D. | DEC |
| Answer» E. | |
| 14. |
The instruction, INC increases the contents of the specified register or memory location by |
| A. | 2 |
| B. | 0 |
| C. | 1 |
| D. | 3 |
| Answer» D. 3 | |