WorksheetsQuizizz-EMS Lab-Matrix,LCD,Seven segment
Total questions: 10
Worksheet time: 3mins
Name
Class
Date
1.
A seven-segment display typically has how many LED segments?
a)
5
b)
7
c)
9
d)
10
2.
In AVR, which port is commonly used to send segment data to a seven-segment display?
a)
PORTB
b)
PORTA
c)
PORTC
d)
PORTD
3.
A common-anode seven-segment display requires segments to be activated by:
a)
Logic LOW
b)
Logic HIGH
c)
Tri-state
d)
PWM
4.
The number '1' on a seven-segment display lights up which segments?
a)
a, b, c
b)
a, b, c, d
c)
a, d
d)
b, c
5.
The 16x2 LCD commonly used with AVR is based on which controller?
a)
AT90S2313
b)
HD4780
c)
HD44780
d)
MAX232
6.
In 8-bit LCD mode, how many data lines are used to send data?
a)
2
b)
6
c)
4
d)
8
7.
Which LCD pin selects between command and data mode?
a)
EN
b)
VEE
c)
RS
d)
RW
8.
The EN (Enable) pin signal for LCD must be:
a)
Constant HIGH
b)
A HIGH-to-LOW pulse
c)
Constant LOW
d)
An analog input
9.
A 4×4 matrix keypad contains how many total key switches?
a)
16
b)
12
c)
8
d)
24
10.
In matrix keypad interfacing, the standard method of detecting key press is:
a)
UART scanning
b)
PWM polling
c)
Row-column scanning
d)
Timer overflow detection
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