MCQOPTIONS
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MCQOPTIONS
This section includes 10 Mcqs, each offering curated multiple-choice questions to sharpen your 8051 Microcontroller knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
INTR,_WR_SIGNAL_IS_AN_INPUT/OUTPUT_SIGNAL_PIN??$ |
| A. | both are output |
| B. | both are input |
| C. | one is input and the other is output |
| D. | none of the mentioned |
| Answer» D. none of the mentioned | |
| 2. |
What_is_the_function_of_the_SCLK_pin_in_MAX1112?$ |
| A. | It is used to bring data in |
| B. | It is used to bring data out and send in the control byte, one at a time |
| C. | It is used to get output clock |
| D. | It is used to get serial output |
| Answer» C. It is used to get output clock | |
| 3. |
8 input DAC has _______? |
| A. | 8 discrete voltage levels |
| B. | 64 discrete voltage levels |
| C. | 124 discrete voltage levels |
| D. | 256 discrete voltage levels |
| Answer» E. | |
| 4. |
Which of the following statements are true about DAC0808? |
| A. | parallel digital data to analog data conversion |
| B. | it has current as an output |
| C. | all of the mentioned |
| D. | none of the mentioned |
| Answer» B. it has current as an output | |
| 5. |
What is the difference between ADC0804 and MAX1112? |
| A. | ADC0804 has 8 bits and MAX1112 has 1 bit for data output |
| B. | ADC0804 is used for adc and dac conversions whereas MAX1112 is used for serial data transmissions |
| C. | ADC0804 has 32 bits and MAX1112 has 3 bit for data output |
| D. | None of the mentioned |
| Answer» B. ADC0804 is used for adc and dac conversions whereas MAX1112 is used for serial data transmissions | |
| 6. |
Step size is selected by which two bits? |
| A. | Vref/2 |
| B. | Vin |
| C. | Vref/2 & Vin |
| D. | None of the mentioned |
| Answer» B. Vin | |
| 7. |
While programming the ADC0804 IC what steps are followed? |
| A. | select the analog channel, start the conversion, monitor the conversion, display the digital results |
| B. | select the analog channel, activate the ALE signal (L to H pulse), start the conversion, monitor the conversion, read the digital results |
| C. | select the analog channel, activate the ALE signal (H to L pulse), start the conversion, monitor the conversion, read the digital results |
| D. | select the channel, start the conversion, end the conversion |
| Answer» C. select the analog channel, activate the ALE signal (H to L pulse), start the conversion, monitor the conversion, read the digital results | |
| 8. |
State which of the following statements are false? |
| A. | CLK IN pin is used to tell about the conversion time |
| B. | INTR pin tells about the end of the conversion |
| C. | ADC0804 IC is an 8 bit parallel ADC in the family of the ADC0800 series |
| D. | None of the mentioned |
| Answer» E. | |
| 9. |
When is the function of the WR pin? |
| A. | its active high input used to inform ADC0804, about the end of conversion |
| B. | its active low input used to inform ADC0804, about the end of conversion |
| C. | its active low input used to inform ADC0804, about the start of conversion |
| D. | its active high input used to inform ADC0804, about the start of conversion |
| Answer» D. its active high input used to inform ADC0804, about the start of conversion | |
| 10. |
Why two pins for ground are available in ADC0804? |
| A. | for controlling the ADCON0 and ADCON1 register of the controller |
| B. | for controlling the analog and the digital pins of the controller |
| C. | for both parts of the chip respectively |
| D. | none of the mentioned |
| Answer» C. for both parts of the chip respectively | |