C++ Intermediate Quiz

1. What is the correct way to declare a function in C++?

a) void myFunc() {}

b) def myFunc():

c) function myFunc() {}

d) myFunc() {}

2. What does `std::vector v;` declare?

a) An array of integers

b) A dynamic array of integers

c) A pointer to integers

d) A single integer

3. True or False: Pointers can store memory addresses.

a) True

b) False

4. What is the output of `int x = 5; int* p = &x; cout << *p;`?

a) Address of x

b) 5

c) &x

d) Error

5. How do you access the first element of `std::vector v = {1, 2, 3};`?

a) v[0]

b) v.first()

c) v.at(1)

d) v.get(0)

6. What is the purpose of `const` in `void func(const int x)`?

a) Makes x global

b) Prevents x from being modified

c) Makes x a pointer

d) Initializes x to 0

7. What does `v.push_back(4);` do for a vector?

a) Removes 4

b) Adds 4 to the end

c) Replaces the last element

d) Clears the vector

8. True or False: Arrays in C++ are always passed by reference.

a) True

b) False

9. What is the output of `int arr[3] = {1, 2, 3}; cout << arr[3];`?

a) 3

b) Undefined

c) 0

d) Error

10. What does `&` mean in `int& ref = x;`?

a) Pointer

b) Reference

c) Address

d) Constant