What does the digitalWrite() function do in Arduino?

• Reads the value from a pin

• Writes a digital value to a pin

• Delays the program

• Initializes the program

Which function is called only once at the start of an Arduino program?

• void loop()

• void setup()

• digitalWrite()

• delay()

In the context of Arduino, what does the delay() function do?

• It stops the program

• It pauses the program for a specified time

• It initializes variables

• It reads sensor data

Which of the following is the correct way to declare a pin as an output in void setup()?

• pinMode(pin, INPUT);

• pinMode(pin, OUTPUT);

• digitalWrite(pin, HIGH);

• delay(pin);

If you want to turn on an LED connected to pin 7, which command should you use?

• digitalWrite(7, HIGH);

• digitalWrite(7, LOW);

• pinMode(7, HIGH);

• delay(7);

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

• To execute code only once

• To repeat the code continuously

• To read input from sensors

• To set up the initial conditions

Which unit is used to measure electric current?

• Volt

• Ampere

• Ohm

• Watt

How do you turn off an LED connected to pin 8?

• digitalWrite(8, HIGH);

• digitalWrite(8, LOW);

• pinMode(8, LOW);

• delay(8);

What happens if you forget to call pinMode() for a pin?

• The pin will automatically be set to OUTPUT

• The pin will not function as expected

• The program will crash

• Nothing; it will work fine

If you wanted to create a simple program that turns on three LEDs in sequence, what would you use?

• Only delay()

• Only digitalWrite()

• Both delay() and digitalWrite()

• Only void setup()