evaluación 702

What is the purpose of declaring a variable in Arduino?

• a) To store values that can be used and modified in the program
  

• b) To turn on and off the Arduino board

• To define the speed of the serial communication

Which of the following correctly declares an integer variable in Arduino?

• int number = 10;

• integer number = 10;

• number = int 10;

What does the following conditional statement do?

if (digitalRead(2) == HIGH) {

digitalWrite(13, HIGH);

}

• Turns off the LED on pin 13 when pin 2 is HIGH

• Turns on the LED on pin 13 when pin 2 is HIGH

• Makes the LED blink continuously

Which of the following statements about for loops is true?

• A for loop repeats a block of code a fixed number of times

• A for loop runs indefinitely unless manually stopped

• A for loop is only used for turning LEDs on and off

What is the function of a photoresistor (LDR) in an Arduino circuit?

• To detect light levels and provide an analog signal

• To generate sound signals in a circuit

• To detect LED light and receive arduino signal

Which function is used to read the value from an LDR sensor connected to an analog pin?

• digitalRead(pin);

• analogRead(pin);

• readLDR(pin);

Which component is best suited for producing sounds in an Arduino project?

• LED

• Buzzer

• LDR

What is the correct syntax to turn on an LED connected to pin 9?

• digitalWrite(9, ON);

• digitalWrite(9, HIGH);

• turnOn(9);

• digitalwrite(9,HIGH)

What will this code do?

for (int i = 0; i < 5; i++) {

digitalWrite(13, HIGH);

delay(500);

digitalWrite(13, LOW);

delay(500);

}

• The LED on pin 13 will blink 5 times and stop

• The LED on pin 13 will stay on permanently

• The code has a syntax error

• The LED on pin 13 will blink 5 times and repeat

int sensorValue;

void setup() {

pinMode(A0, INPUT);

}

void loop() {

sensorValue = analogRead(A0);

if sensorValue > 500 {

digitalWrite(9, HIGH);

}

}

• The condition in the if statement is missing parentheses

• pinMode(9, OUTPUT); is missing in setup()

• Both answers are correct

• There is no mistake