Microcontroller Mock Test 3

10%

Question 1 of 10

1. Find the control word for PA = out, PB = in, PCL = out, PCH = out (Mode0)?

0x02H

0x83H

0x82H

0x03H

Question 1 of 10

Question 2 of 10

2. Which pins are used to select the ports and the control register?

All of the mentioned

Question 2 of 10

Question 3 of 10

3. What is the difference between ADC0804 and MAX1112?

ADC0804 has 8 bits and MAX1112 has 1 bit for data output

ADC0804 is used for adc and dac conversions whereas MAX1112 is used for serial data transmissions

ADC0804 has 32 bits and MAX1112 has 3 bit for data output

None of the mentioned

Question 3 of 10

Question 4 of 10

4. In DS12887, what is correct about the UIP bit of the register A?

all of the mentioned

it is used to select the DS12887 datasheet

it is used to know about the result

it is a read only bit

Question 4 of 10

Question 5 of 10

5. What are optoisolators?

it is a device that can be used as an electromagnetic relay without a driver

none of the mentioned

it is a thing isolated from the entire world

it is a driver

Question 5 of 10

Question 6 of 10

6. In DS12887, which bits of the Register A are used to turn on the oscillator?

All of the mentioned

Question 6 of 10

Question 7 of 10

7. The 8255 is a ______ chip.

Digital to analog

Analog to Digital

None of the mentioned

Input/Output

Question 7 of 10

Question 8 of 10

8. While programming the ADC0808/0809 IC what steps are followed?

select the analog channel, activate the ALE signal (H to L pulse), start the conversion, monitor the conversion, read the digital results

select the analog channel, activate the ALE signal (L to H pulse), start the conversion, monitor the conversion, read the digital results

select the analog channel, start the conversion, monitor the conversion, display the digital results

select the channel, start the conversion, end the conversion

Question 8 of 10

Question 9 of 10

9. In DS12887, what is the range of RAM addresses which are used to store the values of time, calendar and alarm data?

0EH-7FH

00-7FH

0A-0DH

00-09H

Question 9 of 10

Question 10 of 10

10. What is the principle on which electromagnetic relays operate?

none of the mentioned

motor control

electromagnetic induction

switching

Question 10 of 10