Understanding Arduino Basics

What is the primary function of a digital input on an Arduino?

• To output analog signals to external devices.

• To store data from sensors permanently.

• To control the power supply to the Arduino.

• To read binary signals (HIGH or LOW) from external devices.

Which Arduino function is used to set a pin as an input or output?

• pinMode()

• analogRead()

• delay()

• digitalWrite()

What voltage levels correspond to HIGH and LOW in Arduino's digital logic?

• HIGH: 5V, LOW: 2V

• HIGH: 3.3V, LOW: 1.5V

• HIGH: 0V, LOW: 1V

• HIGH: >2.5V, LOW: <0.5V

Which function reads the state of a digital input pin?

• pinStatus(pin)

• readDigital(pin)

• getPinState(pin)

• digitalRead(pin)

What is the range of values returned by the analogRead() function?

• -1 to 1023

• 0 to 1023

• 0 to 512

• 1 to 1024

Which pins on the Arduino are typically used for analog input?

• B0 to B5

• A6 to A10

• A0 to A5

• D0 to D5

Which function is used to write an analog value to a PWM pin?

• setPWM

• writeAnalog

• digitalWrite

• analogWrite

Which Arduino function is used to send data to the serial monitor?

• Serial.write()

• Serial.print() or Serial.println()

• Serial.send()

• Serial.output()

What is the maximum number of digital pins on an Arduino Uno?

• 8

• 10

• 20

• 14

What is the purpose of the delay() function in Arduino?

• To reset the Arduino board.

• To increase the speed of the program execution.

• To read input from sensors.

• To pause the program for a specified duration in milliseconds.