C++ and Arduino Basics Quiz

What is a variable in C++?

• A container for storing data values

• A type of function

• A loop structure

• A conditional statement

What is the purpose of the 'setup()' function in Arduino programming?

• Runs once at the start

• Runs repeatedly

• Sets pin modes

• Controls the loop

What is the correct syntax to declare a variable in C++?

• data_type variable_name;

• variable_name: data_type;

• variable_name = data_type;

• data_type: variable_name;

What is the purpose of the 'digitalWrite()' function in Arduino?

• To set a pin HIGH or LOW

• To read input from a pin

• To delay the program

• To initialize variables

What is the output of the following code snippet: 'int x = 5; int y = 10; float sum = x + y; cout << sum;'?

• 15

• 5

• 10

• Error

What is the purpose of a resistor in a circuit?

• Limits current flow

• Stores energy

• Generates light

• Acts as a switch

What is the correct way to connect an LED to an Arduino?

• Connect the longer leg to a digital pin

• Connect the shorter leg to a digital pin

• Connect both legs to GND

• Connect the LED directly to power

What does the 'delay()' function do in Arduino?

• Pauses the program for a specified time

• Sets a pin mode

• Reads input from a pin

• Outputs a value to a pin

What is the purpose of the 'loop()' function in Arduino programming?

• Runs repeatedly

• Runs once at the start

• Sets pin modes

• Controls the setup

What is the correct way to declare a float variable in C++?

• float variable_name;

• float: variable_name;

• variable_name: float;

• variable_name = float;