Quiz for Structure of a C++ program

Q1: What is the starting point of execution in a C++ program?

A. main() function B. start() function C. init() function D. run() function

Q2: Which header file is necessary to perform input/output operations?

A. <iostream> B. <stdio.h> C. <conio.h> D. <fstream>

Q3: How do you include a header file in C++?

A. #include <header> B. import <header> C. using namespace <header> D. include <header>

Q4: What is the correct syntax to print "Hello World" using C++?

A. cout << "Hello World"; B. print("Hello World"); C. printf("Hello World"); D. echo "Hello World";

Q5: Which namespace is commonly used to avoid prefixing std::?

A. using namespace std; B. namespace std; C. include namespace std; D. std using namespace;

Q6: Which symbol is used to end a statement in C++?

A. ; B. . C. : D. !

Q7: Which function type does the main() function have?

A. int B. void C. float D. char

Q8: How do you write a single-line comment in C++?

A. // comment B. /* comment */ C. # comment D. -- comment

Q9: What is the purpose of the return statement in main()?

A. To return a status code to the operating system B. To end the program immediately C. To declare variables D. To print output

Q10: Which of the following is the correct signature for main()?

A. int main() B. void main() C. main() D. int main(void)

Q11: What is the correct way to declare an integer variable named num?

A. int num; B. num int; C. int num = 0 D. variable int num;

Q12: What is the function of curly braces {} in a C++ program?

A. Define the start and end of a block B. Comment code C. Declare variables D. End a statement

Q13: Which is the correct way to read input from the user?

A. cin >> variable; B. input(variable); C. receive(variable); D. get(variable);

Q14: What is the purpose of the preprocessor directive?

A. To process instructions before compilation B. To execute code C. To declare variables D. To define functions

Q15: Which of the following is a valid C++ identifier?

A. variable1 B. 1variable C. var-iable D. var iable

Q16: Which of the following is NOT a valid variable type in C++?

A. number B. int C. float D. char

Q17: How is the end of file indicated in standard input?

A. EOF or Ctrl+Z (Windows) / Ctrl+D (Unix) B. \0 C. null D. -1

Q18: What is the output of this code snippet: cout << 5 + 3;

A. 8 B. 53 C. Error D. None

Q19: What does the directive "#include <iostream>" do?

A. Includes the standard input-output stream library B. Includes mathematical functions C. Includes string handling functions D. Includes file handling functions

Q20: Which of these statements declares a constant integer?

A. const int num = 10; B. int const num; C. constant int num = 10; D. int num const;