GPIO Control Quiz | OceanRemote Education

1 What function sets a pin as output?

A) digitalWrite() B) pinMode() C) analogRead() D) ledcWrite()

2 What does PWM stand for?

A) Power Width Modulation B) Pulse Wave Modulation C) Pulse Width Modulation D) Power Wave Modulation

3 What is the purpose of button debouncing?

A) Filter false readings from mechanical bounce B) Make button louder C) Increase button speed D) Save power

4 How do you turn ON a standard relay module (active LOW)?

A) pinMode(RELAY, INPUT) B) digitalWrite(RELAY, HIGH) C) digitalWrite(RELAY, HIGH) D) digitalWrite(RELAY, LOW)

5 What is the default PWM resolution on ESP32?

A) 10-bit B) 8-bit C) 12-bit D) 16-bit

6 Which hardware should you use for PWM motor control?

A) Regular relay B) LED C) MOSFET or motor driver D) Button

7 What does INPUT_PULLUP do?

A) Enables internal resistor to keep pin HIGH B) Makes pin output C) Disables the pin D) Enables analog reading