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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 8 of 36

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Q71.
Which of the following will generate the maximum time delay?

a.

f/2

b.

f/4

c.

f/16

d.

f/32

Discuss
Answer: (d).f/32
Q72.
What is the difference in operation of a normal and a CTC mode of a timer?

a.

in CTC mode PWM is used

b.

here serial timer is monitored

c.

here the contents are compared with the OCR register, if value becomes equal then only the timer is cleared

d.

none of the mentioned

Discuss
Answer: (c).here the contents are compared with the OCR register, if value becomes equal then only the timer is cleared
Q73.
We can count the pulses on the positive or the negative edge triggered pulse of the clock?

a.

true

b.

false

c.

can’t be determined

d.

depends on the circumstances

Discuss
Answer: (a).true
Q74.
Which pin is used for the input clock of the counter0?

a.

PORTB.0

b.

PORTB.1

c.

PORTB.2

d.

PORTB.3

Discuss
Answer: (a).PORTB.0
Q75.
Which resource provides clock pulse to AVR timers if CS02-00=6?

a.

internal clock of the AVR

b.

external clock of the AVR

c.

none of the mentioned

d.

all of the mentioned

Discuss
Answer: (b).external clock of the AVR
Q76.
On reset, what are the contents of the SREG register?

a.

00h

b.

ffh

c.

1fh

d.

11h

Discuss
Answer: (a).00h
Q77.
TIMSK register is used for?

a.

knowing the status of the timer count

b.

used for masking the interrupts flags of the Timer0, Timer1 and Timer2

c.

it is used for enabling all the timer interrupts

d.

it is used for resetting the value of the interrupts

Discuss
Answer: (b).used for masking the interrupts flags of the Timer0, Timer1 and Timer2
Q78.
Why RETI instruction is used after an ISR?

a.

because it returns with carry

b.

because it returns to the main program with all the flags of the SREG raised

c.

because it returns to the main program after clearing the roll over flag of the interrupt, so that the interrupt can be caused again

d.

none of the mentioned

Discuss
Answer: (c).because it returns to the main program after clearing the roll over flag of the interrupt, so that the interrupt can be caused again
Q79.
In AVR what is the ISR address for an external hardware interrupt?

a.

0002h

b.

0004h

c.

0006h

d.

all of the mentioned

Discuss
Answer: (d).all of the mentioned
Q80.
What is the address in the interrupt service routine assigned for the timer0 overflow flag?

a.

0012h

b.

000Ah

c.

0016h

d.

all of the mentioned

Discuss
Answer: (c).0016h
Page 8 of 36

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