MCQOPTIONS
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MCQOPTIONS
This section includes 6 Mcqs, each offering curated multiple-choice questions to sharpen your Microprocessors knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
To convert its current output into a voltage, the DAC 0808 is connected with |
| A. | Transistor(BJT) externally |
| B. | FET externally |
| C. | OPAMP externally |
| D. | OPAMP internally |
| Answer» D. OPAMP internally | |
| 2. |
The number of scans of the complete 8-digit display that can be carried out in one second is |
| A. | 15 |
| B. | 25 |
| C. | 35 |
| D. | 55 |
| Answer» C. 35 | |
| 3. |
After the display is selected by second port, then the digit (LED) glows for a duration of |
| A. | 5 msec |
| B. | 10 msec |
| C. | 2 msec |
| D. | 6 msec |
| Answer» B. 10 msec | |
| 4. |
Which is true in interfacing 7 segment code display? |
| A. | transmitted by second port |
| B. | display is selected by third port |
| C. | display is selected by second port |
| D. | none of the mentioned |
| Answer» D. none of the mentioned | |
| 5. |
The number of LEDs that can be connected to a port of 8051, if all are expected to glow simultaneously is |
| A. | 6 |
| B. | 8 |
| C. | 10 |
| D. | 12 |
| Answer» C. 10 | |
| 6. |
If EA(active low) signal =1, then the execution starts from |
| A. | internal EPROM |
| B. | flash RAM |
| C. | internal EPROM or flash RAM |
| D. | none |
| Answer» D. none | |