Microprocessors and Microcontrollers (3160914) MCQs

MCQs of Applications and design of microcontroller based systems

Showing 1 to 10 out of 40 Questions
1.

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

Answer:

Option (d)

2.

How many data lines are there in a 16*2 alphanumeric LCD?

(a)

16

(b)

8

(c)

1

(d)

0

Answer:

Option (b)

3.

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

Answer:

Option (c)

4.

For writing commands on an LCD, RS bit is

(a)

Set

(b)

Reset

(c)

Set and Reset

(d)

None of the above

Answer:

Option (b)

5.

Which command of an LCD is used to shift the entire display to the right?

(a)

0x1C

(b)

0x18

(c)

0x05

(d)

0x07

Answer:

Option (a)

6.

Which command is used to select the 2 lines and 5*7 matrix of an LCD?

(a)

0x01

(b)

0x06

(c)

0x0e

(d)

0x38

Answer:

Option (d)

7.

Which of the following step/s is/are correct for sending 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

Answer:

Option (d)

8.

Which of the following step/s is/are correct to perform reading operation from an LCD?

(a)

low to high pulse at E pin

(b)

R/W pin is set high

(c)

low to high pulse at E pin & R/W pin is set high

(d)

none of the mentioned

Answer:

Option (c)

9.

Which instruction is used to select the first row first column of an LCD?

(a)

0x08

(b)

0x0c

(c)

0x80

(d)

0xc0

Answer:

Option (c)

10.

The RS pin is _________ for an LCD.

(a)

input

(b)

output

(c)

input & output

(d)

none of the mentioned

Answer:

Option (a)

Showing 1 to 10 out of 40 Questions