Lesson 8 Quiz: Sensor-Controlled Outputs with Arduino

What is the correct pattern for using a sensor to control an output?

A) Act → read → decide B) Read → decide → act C) Decide → read → act D) Read → act → decide

In the code if (sensorValue > 500), what does 500 represent?

A) The sensor pin number B) The threshold that decides when to change the output C) The LED brightness value D) The delay time in milliseconds

If sensorValue = 700 and the code is if (sensorValue > 500) { digitalWrite(ledPin, HIGH); } else { digitalWrite(ledPin, LOW); }, what happens?

A) The LED turns off B) The LED turns on C) The LED blinks D) Nothing happens

What must you include in setup() to control an LED on pin 13?

A) pinMode(13, INPUT) B) pinMode(13, OUTPUT) C) pinMode(A0, OUTPUT) D) Nothing is needed

How can you create three response levels (Low, Medium, High) from a sensor reading?

A) Use three separate sensors B) Use multiple if/else statements with different thresholds C) Use three different analog pins D) It's not possible

What is a benefit of using functions like turnOnLED() and turnOffLED()?

A) It makes the code run faster B) It organizes code and makes it easier to read C) It uses less memory D) It is required for sensors to work

What does this code do?
for (int i = 0; i < 5; i++) { sum += analogRead(sensorPin); delay(50); }

A) It takes one sensor reading B) It takes 5 sensor readings and adds them together C) It turns the LED on 5 times D) It reads from 5 different pins

What does this line do?
int sensorValue = analogRead(sensorPin);

A) It stores the sensor reading in a variable B) It sends a value to the sensor C) It turns on the LED D) It prints the sensor value

Explain how you would choose a good threshold value for a light sensor that turns on an LED when it gets dark.

Describe a sensor-controlled project you could build. What sensor would you use, what would it detect, and what output would it control?

Quiz Instructions