
EmTech Pop Quiz 2
Authored by Jess Nodado
Computers
11th Grade
Used 2+ times

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20 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the correct function to turn on an LED connected to an Arduino digital pin?
digitalWrite(pin, HIGH);
analogWrite(pin, LOW);
pinMode(pin, OUTPUT);
delay(1000);
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of the following libraries is required to interface a 16x2 character LCD with an Arduino using an I2C module?
Wire.h
LiquidCrystal.h
LiquidCrystal_I2C.h
Servo.h
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In a 16x2 LCD, what does "16x2" indicate?
The LCD has 16 data pins and 2 control pins
The LCD can display 16 pixels per row in 2 rows
The LCD has 16 characters per row and 2 rows
The LCD supports 16-bit data transmission with 2 data buses
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
If you want to display the message "Hello, World!" on an LCD connected to an Arduino, which function should you use?
lcd.show("Hello, World!");
lcd.print("Hello, World!");
lcd.display("Hello, World!");
lcd.write("Hello, World!");
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How many keys are present in a 4x4 membrane keypad?
8
12
16
20
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which type of signal does a water level sensor typically output?
Only digital
Only analog
Both analog and digital
None of the above
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What principle does a rain detector sensor use to detect rain?
Change in temperature due to water conductivity
Change in resistance due to water conductivity
Change of Infrared radiation due to water conductivity
Change of radio frequency due to water conductivity
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