MCQOPTIONS
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MCQOPTIONS
This section includes 10 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_FUNCTION,_‚ÄÖ√Ñ√∂‚ÀÖ√Ë‚Àւ§DATA_BUS_TRISTATED‚ÄÖ√Ñ√∂‚ÀÖ√Ë‚ÀÖ¬•_IS_PERFORMED_WHEN?$# |
| A. | CS(active low) = 1 |
| B. | CS(active low) = 0 |
| C. | CS(active low) = 0, RD(active low) = 1, WR(active low) = 1 |
| D. | CS(active low) = 1 OR CS(active low) = 0, RD(active low) = 1, WR(active low) = 1 |
| Answer» E. | |
| 2. |
The_pin_that_clears_the_control_word_register_of_8255_when_enabled_is$ |
| A. | CLEAR |
| B. | SET |
| C. | RESET |
| D. | CLK |
| Answer» D. CLK | |
| 3. |
If A1=0, A0=1 then the input read cycle is performed fro? |
| A. | port A to data bus |
| B. | port B to data bus |
| C. | port C to data bus |
| D. | CWR to data bus |
| Answer» C. port C to data bus | |
| 4. |
The port that is used for the generation of handshake lines in mode 1 or mode 2 is |
| A. | port A |
| B. | port B |
| C. | port C Lower |
| D. | port C Upper |
| Answer» E. | |
| 5. |
The device that receives or transmits data upon the execution of input or output instructions by the microprocessor is |
| A. | control word register |
| B. | read/write control logic |
| C. | 3-state bidirectional buffer |
| D. | none of the mentioned |
| Answer» D. none of the mentioned | |
| 6. |
The input provided by the microprocessor to the read/write control logic is |
| A. | RESET |
| B. | A1 |
| C. | WR(ACTIVE LOW) |
| D. | All of the mentioned |
| Answer» E. | |
| 7. |
The data bus buffer is controlled by |
| A. | control word register |
| B. | read/write control logic |
| C. | data bus |
| D. | none of the mentioned |
| Answer» C. data bus | |
| 8. |
All the functions of the ports of 8255 are achieved by programming the bits of an internal register called |
| A. | data bus control |
| B. | read logic control |
| C. | control word register |
| D. | none of the mentioned |
| Answer» D. none of the mentioned | |
| 9. |
Port C of 8255 can function independently as |
| A. | input port |
| B. | output port |
| C. | either input or output ports |
| D. | both input and output ports |
| Answer» D. both input and output ports | |
| 10. |
Programmable peripheral input-output port is another name for |
| A. | serial input-output port |
| B. | parallel input-output port |
| C. | serial input port |
| D. | parallel output port |
| Answer» C. serial input port | |