C++ quiz with certificate: Test your skills and earn recognition for jobs

1. Which of the following is the correct way to declare a function named calculateSum that takes two integers as arguments and returns an integer?

2. What is a reference variable in C++?

3. Which of the following is an advantage of using std::unique_ptr over raw pointers in C++?

4. What is the purpose of the volatile keyword in C++?

5. Which of the following is used to handle exceptions in C++?

6. What does the const keyword signify when applied to a variable in C++?

7. Which of the following is NOT a fundamental data type in C++?

8. What is the output of the following C++ code snippet that uses variadic templates?
template
void print(Ts... args) {
((std::cout << args << ' '), ...); std::cout << std::endl; } int main() { print(1, 3.14, "Hello"); return 0; }

9. Which of the following is the correct way to declare a variable named "age" of type integer in C++?

10. What is the purpose of the mutable keyword in C++?

11. What is the difference between pass by value and pass by reference in C++ function arguments?

12. What is the output of the following C++ code?
C++
int x = 10;
int y = 5;
cout < y ? x : y);

13. Which of the following statements is true about lvalue and rvalue references in C++?

14. What is the purpose of the explicit keyword in a C++ constructor?

15. What is the correct syntax for creating an array named "numbers" that can hold 5 integers in C++?

16. What is the purpose of a constructor in a C++ class?

17. What is the output of the following C++ code?

string message = "Hello";
cout << message.length();

18. Which of the following is a design pattern commonly used in C++ for creating objects?

19. What is the output of the following C++ code snippet that demonstrates perfect forwarding?

template
void func(T&& arg) {
std::cout << std::is_lvalue_reference::value << std::endl; } int main() { int x = 5; func(x); func(5); return 0; }

20. Which of the following operators is used for logical AND in C++?