9 . Arduino Piano

What is the primary component used to produce sound in an Arduino piano project?

• piezo buzzer
• motor
• LED
• speaker

Which function in Arduino is used to produce a tone on a buzzer?

• beep()
• sound()
• buzz()
• tone()

What does the noTone() function do in an Arduino sketch?

• Increases the volume of the buzzer

• Changes the frequency of the buzzer

• Turns on the buzzer

• Stops the tone on the buzzer

In an Arduino piano project, which component is used to detect key presses?

• Switch
• LED
• Resistor
• PushButton

How do you specify the frequency of the tone produced by the buzzer in Arduino?

• tone(pin, frequency, duration);

• tone(pin, duration);

• tone(pin, volume);

• tone(pin, frequency);

How can you turn off the tone on pin 8 in an Arduino sketch?

• offTone(8);

• noTone(8);

• stopTone(8);

• endTone(8);

What is the purpose of using delay() in an Arduino sketch for a piano?

• To speed up the execution of the sketch
• To add random noise to the notes
• To change the pitch of the notes
• To add a pause between tones

How do you connect a buzzer to an Arduino board for sound output?

• Connect the positive leg of the buzzer to a digital pin and the negative leg to GND

• Connect both legs of the buzzer to digital pins

• Connect the positive leg of the buzzer to GND and the negative leg to a digital pin

• Connect both legs of the buzzer to GND

Which function is continuously executed in the Arduino loop to check button states?

• run()

• main()

• loop()

• delay()

Choose the correct option which produces the sound .

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