What does LED stand for?

• Long Emitting Diode

• Light Emitting Device

• Light Emitting Diode

• Low Energy Device

What is the purpose of a digital system's output?

• To provide input

• To display signal

• To store data

• To connect devices

How many LEDs are used in the traffic light circuit?

• Five

• Four

• Three

• Two

What is the purpose of a digital system's input?

• To provide output

• To connect devices

• To store data

• To detect signal

What happens when you press a push button switch?

• It makes a loud noise

• It can play music

• It can turn on or off a device

• It stays in one position

What type of switch is a toggle switch?

• A switch that spins

• A switch that can be in two positions

• A switch that is pressed

• A switch that is always off

What is the purpose of the Arduino in the circuit?

• To play music

• To read signals from the input

• To make the buttons colorful

• To cook food

What does a seven segment display show?

• Letters only

• Digits from 0-9

• Shapes

• Colors

How many LEDs are used in a typical seven segment display?

• 9

• 8

• 7

• 6

What does LCD stand for?

• Light Color Display

• Liquid Color Display

• Light Crystal Display

• Liquid Crystal Display