IOT Quiz

Which function is used to turn on the LED in Arduino?

• digitalOff()

• digitalOn()

• digitalWrite()

• analogWrite()

What is the purpose of the delay() function in an LED blinking code?

• To stop the LED from blinking

• To control the speed of the LED blinking

• To turn the LED on

• To reset the Arduino

Which Arduino pin is typically connected to the positive side of an LED?

• A0

• D0

• GND

• Any digital pin

When using a push button, what state is detected when the button is pressed?

• HIGH

• LOW

• NO CHANGE

• FLOATING

What function reads the input state of a button in Arduino?

• analogRead()

• digitalRead()

• inputRead()

• buttonRead()

What is the purpose of an ultrasonic sensor in Arduino projects?

• To detect sound

• To measure temperature

• To measure distance

• To sense motion

Which Arduino pins are typically used to connect to the trigger and echo pins of the ultrasonic sensor?

• Digital pins

• Analog pins

• PWM pins

• RX and TX pins

What does a soil moisture sensor measure?

• Soil pH

• Soil temperature

• Soil humidity level

• Soil nutrient level

Which Arduino pin is typically used to read analog data from the soil moisture sensor?

• Digital pin

• PWM pin

• A0

• D13

When the soil moisture sensor gives a high analog value, what does it indicate?

• Soil is very dry

• Soil has moderate moisture

• Soil is wet

• Soil temperature is high