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. 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; }

4. What is the difference between a while loop and a do-while loop in C++?

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

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

7. Which of the following is NOT a valid C++ access specifier for class members?

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

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

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

11. What does the virtual keyword signify in a C++ class member function?

12. In C++, what is the purpose of the modulus operator (%)?

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

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

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

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

17. What is the output of the following C++ code snippet that uses smart pointers?

#include
#include
int main() {
std::shared_ptr p1 = std::make_shared(5);
std::weak_ptr p2 = p1;
p1.reset();
if (p2.expired()) {
std::cout << "Expired"; } else { std::cout << "Not expired"; } return 0; }

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

19. Which of the following is the correct way to include the input/output library in C++?

20. What is the purpose of the "using namespace std;" statement in C++?