Arduino Basics

What is the function of a resistor in an electronic circuit?

• To increase the voltage in an electronic circuit.

• To store data in an electronic circuit.

• To limit the flow of current in an electronic circuit.

• To amplify the signal in an electronic circuit.

How do you write a simple 'Hello World' program in Arduino?

• void setup() { Serial.begin(9600); } void loop() { Serial.println('Greetings Earth!'); delay(1000); }

• void setup() { Serial.begin(9600); } void loop() { Serial.println('Goodbye World!'); delay(1000); }

• void setup() { Serial.begin(9600); } void loop() { Serial.println("Hello World!"); delay(1000); }

• void setup() { Serial.begin(9600); } void loop() { Serial.println('Hello Universe!'); delay(1000); }

Name one input device that can be used with Arduino.

• Touch sensor

• Push button

• Rotary encoder

• Accelerometer

What is the purpose of a breadboard in prototyping circuits?

• To allow for easy and temporary connections between components without soldering.

• To provide a stable foundation for the circuit components

• To add unnecessary complexity to the circuit design

• To cook bread while prototyping circuits

Explain the difference between analog and digital signals in the context of Arduino.

• Analog signals are only used in computers, digital signals are used in all electronics.

• Analog signals are faster than digital signals.

• Analog signals are binary, digital signals are ternary.

• Analog signals are continuous, digital signals are discrete.

What is the role of a LED (Light Emitting Diode) in an Arduino project?

• To control the speed of a motor

• To provide visual feedback by emitting light

• To measure temperature

• To play music

How do you declare a variable in Arduino programming?

• int myVariable;

• declare myVariable;

• variable myVariable;

• myVar = 0;

Name one commonly used output device with Arduino.

• Speaker

• Motor

• LCD screen

• LED

What is the function of a potentiometer in a circuit?

• To regulate the current flow by changing resistance

• To amplify the signal by changing resistance

• To control the frequency by adjusting resistance

• To adjust the voltage by changing resistance

Explain the concept of 'void setup()' and 'void loop()' in Arduino sketch.

• void setup() is for initialization tasks, and void loop() is for the main code execution in an Arduino sketch.

• void setup() is for main code execution, and void loop() is for initialization tasks.

• void loop() is for initialization tasks, and void setup() is for the main code execution.

• void setup() is for both initialization tasks and main code execution.