LCD Interfacing MCQ’s

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This set of Microcontroller Multiple Choice Questions & Answers (MCQs) focuses on “LCD Interfacing”.

1. How many data lines are there in a 16*2 alphanumeric LCD?
a) 16
b) 8
c) 1
d) 0

2. 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

3. 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

4. For writing commands on an LCD, RS bit is
a) set
b) reset
c) set & reset
d) none of the mentioned

5. Which command is used to select the 2 lines and 5*7 matrix of an LCD?
a) 0x01
b) 0x06
c) 0x0e
d) 0x38

6. 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

7. Which command of an LCD is used to shift the entire display to the right?
a) 0x1C
b) 0x18
c) 0x05
d) 0x07

8. 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

9. Which instruction is used to select the first row first column of an LCD?
a) 0x08
b) 0x0c
c) 0x80
d) 0xc0

10. The RS pin is _________ for an LCD.
a) input
b) output
c) input & output
d) none of the mentioned

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