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Welcome to the Microcontroller MCQs Page

Dive deep into the fascinating world of Microcontroller with our comprehensive set of Multiple-Choice Questions (MCQs). This page is dedicated to exploring the fundamental concepts and intricacies of Microcontroller, a crucial aspect of Computer Architecture. In this section, you will encounter a diverse range of MCQs that cover various aspects of Microcontroller, from the basic principles to advanced topics. Each question is thoughtfully crafted to challenge your knowledge and deepen your understanding of this critical subcategory within Computer Architecture.

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Check out the MCQs below to embark on an enriching journey through Microcontroller. Test your knowledge, expand your horizons, and solidify your grasp on this vital area of Computer Architecture.

Note: Each MCQ comes with multiple answer choices. Select the most appropriate option and test your understanding of Microcontroller. You can click on an option to test your knowledge before viewing the solution for a MCQ. Happy learning!

Microcontroller MCQs | Page 15 of 36

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Q141.
DS1307 control register has an address of

a.

00H

b.

03H

c.

07H

d.

10H

Discuss
Answer: (c).07H
Q142.
What does the CH bit of the DS1307 demonstrate?

a.

clock high

b.

clock halt

c.

clear high

d.

clear halt

Discuss
Answer: (b).clock halt
Q143.
Why are relays used for driving the motors?

a.

they act as a switch for driving motors

b.

they increase the current capability required by the motors

c.

they are used to reduce the back emf from the motors

d.

all of the mentioned

Discuss
Answer: (a).they act as a switch for driving motors
Q144.
Why are ULN2803 normally used between the micro controllers and the relays?

a.

for switching purposes

b.

for increasing the current capability required by a relay

c.

for increasing the voltage capability required by a relay

d.

all of the mentioned

Discuss
Answer: (b).for increasing the current capability required by a relay
Q145.
Why are opto isolators normally used between the micro controllers and the ULN2803?

a.

to optimise the current

b.

to reduce the back emf

c.

to increase the current

d.

to increase the voltage

Discuss
Answer: (b).to reduce the back emf
Q146.
Which of the following is a type of a electromagnetic relay?

a.

SPST

b.

SPDT

c.

DPDT

d.

All of the mentioned

Discuss
Answer: (d).All of the mentioned
Q147.
Reed switches show connectivity whenever they are in the presence of an electrical field?

a.

true

b.

false

c.

can’t say

d.

depends on the conditions

Discuss
Answer: (b).false
Q148.
Which of the following is an application of stepper motors?

a.

in printers

b.

in robots

c.

in vehicles

d.

all of the mentioned

Discuss
Answer: (d).all of the mentioned
Q149.
What are normal 4 step sequence of a stepper motor if we start to move in clockwise direction with 0110 value?

a.

1100,1001,0011,0110

b.

0011,1001,1100,0110

c.

1001,1100,0110,0011

d.

0101,1010,0101,1010

Discuss
Answer: (b).0011,1001,1100,0110
Q150.
What is the meaning of a step angle?

a.

angle which a stepper motor has

b.

angle between the two windings of the stator in a stepper motor

c.

minimum degree of rotation associated with a step angle

d.

angle between the stator and the rotor

Discuss
Answer: (c).minimum degree of rotation associated with a step angle
Page 15 of 36

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