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. |
PORT_1_LINES_ARE_USED_DURING_PROGRAMMING_OF?$ |
| A. | external EPROM and EEPROM |
| B. | external ROM and RAM |
| C. | internal ROM and RAM |
| D. | internal EPROM and EEPROM |
| Answer» E. | |
| 2. |
WHEN_THE_PORT_LINES_OF_A_PORT_ARE_TO_BE_USED_AS_INPUT_LINES_THEN_THE_VALUE_THAT_MUST_BE_WRITTEN_TO_THE_PORT_ADDRESS_IS?$ |
| A. | F0H |
| B. | 0FH |
| C. | FFH |
| D. | 00H |
| Answer» D. 00H | |
| 3. |
The configuration in which each LED receives operating current of 8 mA from power supply while the port lines sink the current on each port line is$ |
| A. | common port configuration |
| B. | common anode configuration |
| C. | common cathode configuration |
| D. | none of the mentioned |
| Answer» C. common cathode configuration | |
| 4. |
If the EA(active low) signal is grounded then the executio? |
| A. | directly start from main memory |
| B. | directly start from 16 bit address in main memory |
| C. | directly start from 16 bit address in program memory |
| D. | directly start from RAM |
| Answer» D. directly start from RAM | |
| 5. |
The port that will source a current of 500 micro amperes when being used as input ports is |
| A. | 0.5 mA |
| B. | 0.25 mA |
| C. | 250 micro amperes |
| D. | 500 micro amperes |
| Answer» E. | |
| 6. |
The port that can source or sink 4 LS TTL inputs when being used as an output port on each of its line is |
| A. | Port 1 |
| B. | Port 2 |
| C. | Port 3 |
| D. | all of the mentioned |
| Answer» E. | |
| 7. |
The open drain bidirectional (input or output) port with internal pullups is |
| A. | Port 0 |
| B. | Port 1 |
| C. | Port 2 |
| D. | Port 3 |
| Answer» B. Port 1 | |
| 8. |
The number of TTL inputs that can be sinked by the port 0 when a logic 0 is sent to a port line as an output port is |
| A. | 2 |
| B. | 4 |
| C. | 6 |
| D. | 8 |
| Answer» E. | |
| 9. |
Each port line of a port can individually source a current of upto |
| A. | 0.2 mA |
| B. | 0.25 mA |
| C. | 0.5 mA |
| D. | 0.75 mA |
| Answer» D. 0.75 mA | |
| 10. |
Which of the following is not one of the SFR addresses of the ports of 8051? |
| A. | 80H |
| B. | 90H |
| C. | A0H |
| D. | NONE |
| Answer» E. | |