ESP8266 Module 2 Quiz | OceanRemote Education

1 Which function sets a pin as output?

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

2 What does debouncing do?

A) Filters false button readings B) Increases button speed C) Saves power D) Turns LED on/off

3 How do you turn ON a standard relay module?

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

4 What is the range of analogWrite() on ESP8266?

A) 0-1023 B) 0-255 C) 0-4095 D) 0-100

5 Which hardware should you use for PWM motor control?

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

6 What is INPUT_PULLUP used for?

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

7 What pin is the built-in LED on NodeMCU?

A) D1 (GPIO5) B) D2 (GPIO4) C) D4 (GPIO2) D) D8 (GPIO15)