What is the purpose of the line // my first program in C++?

• It executes before the program starts

• It is a comment and has no effect on the program

• It declares the main function

• It includes a library

What does the directive #include <iostream> do?

• Starts the program execution

• Ends the program execution

• Includes the standard input-output stream library

• Creates a new function

What is the significance of the line int main()?

• It includes the input-output stream

• It defines the starting point of a C++ program

• It is a comment line

• It is used to declare a variable

Which of the following symbols are used to define the beginning and end of a function body?

• ( )

• < >

• [ ]

• { }

Which of the following is NOT true about blank lines in C++?

• They affect how the program runs

• They improve readability

• They are ignored by the compiler

• They can be placed anywhere in the code

What is a variable in C++?

• A reserved keyword in the language

• A portion of memory to store a value

• A comment used to document the code

• A line of code that prints output

Which of the following is a valid identifier in C++?

• 2value

• total-sum

• _count

• break

Which of the following declarations is equivalent to int a, b, c;?

• int a; int b; int c;

• int a = b = c;

• int (a, b, c);

• int [a, b, c];

Which header must be included to use the string type in C++?

• #include <iostream>

• #include <stdlib.h>

• #include <cstring>

• #include <string>

What does the endl manipulator do when used with cout?

• Prints a newline and flushes the output stream

• Declares an integer literal

• Ends the program

• Clears the screen