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_SIGNALS_THAT_ARE_PROVIDED_TO_MAINTAIN_PROPER_DATA_FLOW_AND_SYNCHRONIZATION_BETWEEN_THE_DATA_TRANSMITTER_AND_RECEIVER_ARE?$ |
| A. | handshaking signals |
| B. | control signals |
| C. | input signals |
| D. | none |
| Answer» B. control signals | |
| 2. |
The_feature_of_mode_2_of_8255_is$ |
| A. | single 8-bit port is available |
| B. | both inputs and outputs are latched |
| C. | port C is used for generating handshake signals |
| D. | all of the mentioned |
| Answer» E. | |
| 3. |
The level of the signal ERROR(active low) becomes ‘low’ when the printer is i?# |
| A. | Paper end state |
| B. | Offline state |
| C. | Error state |
| D. | All of the mentioned |
| Answer» E. | |
| 4. |
The pulse width of the signal INIT at the receiving terminal must be more than |
| A. | 10 microseconds |
| B. | 20 microseconds |
| C. | 40 microseconds |
| D. | 50 microseconds |
| Answer» E. | |
| 5. |
The signal, SLCT in the direction of signal flow, OUT, indicates the selection of |
| A. | Control word register |
| B. | CPU |
| C. | Printer |
| D. | Ports |
| Answer» D. Ports | |
| 6. |
If the value of the pin STB (Strobe Input) falls to low level, then |
| A. | input port is loaded into input latches |
| B. | input port is loaded into output latches |
| C. | output port is loaded into input latches |
| D. | output port is loaded into output latches |
| Answer» B. input port is loaded into output latches | |
| 7. |
The strobed input/output mode is another name of |
| A. | mode 0 |
| B. | mode 1 |
| C. | mode 2 |
| D. | none |
| Answer» C. mode 2 | |
| 8. |
The feature of mode 0 is |
| A. | any port can be used as input or output |
| B. | output ports are latched |
| C. | maximum of 4 ports are available |
| D. | all of the mentioned |
| Answer» E. | |
| 9. |
In BSR mode, only port C can be used to |
| A. | set individual ports |
| B. | reset individual ports |
| C. | set and reset individual ports |
| D. | programmable I/O ports |
| Answer» D. programmable I/O ports | |
| 10. |
In the I/O mode, the 8255 ports work as |
| A. | reset pins |
| B. | set pins |
| C. | programmable I/O ports |
| D. | only output ports |
| Answer» D. only output ports | |