Arduino Training - MCQ Quiz

What is the main function of a push button in an Arduino circuit?

• To generate an analog signal

• To control the brightness of an LED

• To provide a digital input (HIGH or LOW) to the Arduino

• To store data

Which Arduino function is used to read the state of a digital pin?

• analogRead()

• pinMode()

• digitalWrite()

• digitalRead()

What is the typical voltage range of an Arduino Uno’s digital pins?

• 0V - 3.3V

• 0V - 12V

• 0V - 5V

• -5V - 5V

How does a buzzer produce sound in an Arduino project?

• By varying the voltage

• By using the analogRead() function

• By receiving a frequency signal from the Arduino

• By changing the resistance

What is the function of an ultrasonic sensor in an Arduino project?

• To detect water level

• To measure the distance of objects using sound waves

• To control LED brightness

• To detect temperature

Which Arduino pins are used to read analog sensor values?

• Digital pins (D0 - D13)

• PWM pins

• Analog pins (A0 - A5)

• Ground (GND)

If a water level sensor gives a high value, what does it indicate?

• Low water level

• No water detected

• High water level

• Water is not conductive

How does an ultrasonic sensor measure distance?

• By detecting light reflection

• By sending and receiving ultrasonic waves

• By detecting infrared radiation

• By measuring electrical resistance

Which function is used to generate a PWM signal for an LED or buzzer?

• analogWrite()

• digitalWrite()

• pinMode()

• analogRead()

What is the function of an LDR (Light Dependent Resistor) in an Arduino project?

• To measure water level

• To detect temperature changes

• To sense light intensity

• To generate sound