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Welcome to the 8051 Microcontroller MCQs Page

Dive deep into the fascinating world of 8051 Microcontroller with our comprehensive set of Multiple-Choice Questions (MCQs). This page is dedicated to exploring the fundamental concepts and intricacies of 8051 Microcontroller, a crucial aspect of Computer Architecture. In this section, you will encounter a diverse range of MCQs that cover various aspects of 8051 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 8051 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 8051 Microcontroller. You can click on an option to test your knowledge before viewing the solution for a MCQ. Happy learning!

8051 Microcontroller MCQs | Page 8 of 14

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Q71.
How many rows and columns are present in a 16*2 alphanumeric LCD?

a.

rows=2, columns=32

b.

rows=16, columns=2

c.

rows=16, columns=16

d.

rows=2, columns=16

Discuss
Answer: (d).rows=2, columns=16
Q72.
How many data lines are there in a 16*2 alphanumeric LCD?

a.

16

b.

8

c.

1

d.

0

Discuss
Answer: (b).8
Q73.
Which pin of the LCD is used for adjusting its contrast?

a.

pin no 1

b.

pin no 2

c.

pin no 3

d.

pin no 4

Discuss
Answer: (c).pin no 3
Q74.
For writing commands on an LCD, RS bit is

a.

set

b.

reset

c.

both of the mentioned

d.

none of the mentioned

Discuss
Answer: (b).reset
Q75.
Which command of an LCD is used to shift the entire display to the right?

a.

0x1C

b.

0x18

c.

0x05

d.

0x07

Discuss
Answer: (a).0x1C
Q76.
Which command is used to select the 2 lines and 5*7 matrix of an LCD?

a.

0x01

b.

0x06

c.

0x0e

d.

0x38

Discuss
Answer: (d).0x38
Q77.
What changes are to be made to send data to an LCD?

a.

set the R/W bit

b.

set the E bit

c.

set the RS bit

d.

all of the mentioned

Discuss
Answer: (c).set the RS bit
Q78.
For reading operation from an LCD what changes in the software are introduced?

a.

low to high pulse at E pin

b.

R/W pin is set high

c.

both of the mentioned

d.

none of the mentioned

Discuss
Answer: (c).both of the mentioned
Q79.
Which instruction is used to select the first row first column of an LCD?

a.

0x08

b.

0x0c

c.

0x80

d.

0xc0

Discuss
Answer: (c).0x80
Q80.
The RS pin is an input or output for a controller?

a.

input

b.

output

c.

both of the mentioned

d.

none of the mentioned

Discuss
Answer: (b).output
Page 8 of 14

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