14. The Final Quiz

Check your knowledge from this mini-book!

1. Which C++ Standard did add in-class default member initializers?

1. C++98
2. C++11
3. C++14
4. C++17

2. Can you use auto type deduction for non-static data members?

1. Yes, since C++11
2. No
3. Yes, since C++20

3. Do you need to define a static inline data member in a separate cpp file?

1. No, the definition happens at the same place where a static inline member is declared.
2. Yes, the compiler needs the definition in a cpp file.
3. Yes, the compiler needs a definition in all translation units that use this variable.

4. Can a static inline variable be non-constant?

1. Yes, it’s just a regular variable.
2. No, inline variables must be constant.

5. Consider the following code:

struct S {
    int a { 10 };
    int b { 42 };
};

What’s the output of the following line?

S s { 1 };
std::cout << s.a << ", " << s.b;

1. 1, 0
2. 10, 42
3. 1, 42

6. Consider the following code:

class C {
    C(int x) : a(x) { }

    int a { 10 };
    int b { 42 };
};

C c(0);

More questions available in the full version of the book.