Programming Concepts in Arduino

What function is used to configure a pin as an input or output in Arduino?

• digitalRead()

• pinMode()

• digitalWrite()

• analogRead()

In the code digitalRead(2), what does the number 2 represent?

• The button state

• The LED pin

• The pin number connected to the button

• The value to write to the pin

What is the purpose of a pull-down resistor in a button circuit?

• To increase the brightness of the LED

• To keep the button pin in a known state when not pressed

• To prevent the button from bouncing

• To reduce the current flowing through the LED

Which function is used to turn an LED on or off in Arduino?

• pinMode()

• digitalWrite()

• delay()

• digitalRead()

If a button is pressed, what value is read using digitalRead()?

• 0

• 1

• LOW

• HIGH

In the code snippet below, what is the purpose of the if statement?

if (buttonState == HIGH) {

digitalWrite(ledPin, HIGH);

}

• To configure the LED pin as an output

• To read the button state

• To turn on the LED when the button is pressed

• To toggle the state of the button

What will happen if a delay is added inside the loop function?

• It will increase the brightness of the LED.

• It will prevent the button from working.

• It will slow down the execution of the loop.

• It will turn off the LED automatically.

Which of the following best describes the purpose of digitalWrite(ledPin, LOW)?

• It configures the pin as an input.

• It turns the LED off.

• It reads the button state.

• It increases the brightness of the LED.

What is the purpose of the loop() function in Arduino programs?

• To execute code only once.

• To continuously execute the code inside it.

• To configure the pins as input or output.

• To stop the program after a button press.

What happens when delay(1000) is included in the code?

• The program will pause for 100 milliseconds.

• The program will execute the next line of code immediately.

• The program will pause for 1 second.

• The program will turn off all LEDs.