3. Arduino GPIO Programming

Gary has built the following circuit. Which of the following cases will turn ON the LED?

const int button1Pin = 4;
const int button2Pin = 5;
const int ledPin = 2;

void setup() {
  pinMode(button1Pin, INPUT_PULLUP);
  pinMode(button2Pin, INPUT);
  pinMode(ledPin, OUTPUT);
}

void loop() {
  bool button1State = digitalRead(button1Pin);
  bool button2State = digitalRead(button2Pin);

  if (button1State || button2State) {
    digitalWrite(ledPin, HIGH);
  } else {
    digitalWrite(ledPin, LOW);
  }
}