Introduction to C++

What is the correct file extension for a C++ source file?

• .cpp

• .exe

• .java

• .txt

What is the purpose of the #include directive?

• To allow input and output operations

• To define a new programming language

• To import all available functions in C++

• To format text output

What does the int main() function do?

• Starts the execution of a C++ program

• Declares global variables

• Runs system-level commands

• Automatically prints output

Which of the following is NOT a valid C++ variable name?

• myVariable

• 2cool4school

• _underscore_variable

• camelCaseExample

What will cout << "Hello" << " World!" << endl; output?

• A) Hello World!

• B) HelloWorld!

• C) "Hello" "World!"

• D) Compilation error

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

• const double PI = 3.14159;

• let PI = 3.14159;

• define PI 3.14159;

• permanent double PI = 3.14159;

Which of the following is NOT a valid C++ data type?

• int

• double

• string

• decimal

What happens if you divide an integer by zero in C++?

• A) A runtime error occurs

• B) The program returns infinity

• C) The result is 0

• D) The compiler automatically handles the exception

What does the modulus operator (%) do?

• Returns the remainder of a division

• Divides two numbers

• Converts values to percentages

• Returns the absolute value

Which statement correctly initializes a char variable in C++?

• char letter = 'A';

• char letter = "A";

• char letter = A;

• character letter = 'A';