C++ programming

Question 1

What is the purpose of a compiler in C++?

Accepted Answer

To translate source code into machine-readable code

Question 2

What is the purpose of using namespace std; in a C++ program?

Accepted Answer

To avoid writing std:: before standard library elements

Question 3

What is the role of the main() function in a C++ program?

Accepted Answer

It is the starting point of program execution

Question 4

Why are header files included in a C++ program?

Accepted Answer

To provide pre-written function and object declarations

Question 5

What is the correct way to declare an integer variable in C++?

Accepted Answer

int x;

Question 6

Which of the following is the correct syntax to print "Hello, world!" in C++?

Accepted Answer

cout << "Hello, world!";

Question 7

Which operator is used to insert data into the output stream in C++?

Accepted Answer

<<

Question 8

What does the endl manipulator do in C++?

Accepted Answer

Inserts a newline and flushes the output buffer

Question 9

What is the output of 7 % 3 in C++?

Accepted Answer

1

Question 10

Which header file is required for input and output operations in C++?

Accepted Answer

Question 11

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

Accepted Answer

real

Question 12

Which of the following is a reason to learn C++?

Accepted Answer

It provides a strong foundation for understanding programming logic

Question 13

What happens if a semicolon ; is omitted after a statement in C++?

Accepted Answer

A syntax error occurs

Question 14

Which statement correctly reads an integer input from the user in C++?

Accepted Answer

cin >> x;

Question 15

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

Accepted Answer

// This is a comment

Questions 15