4. Engineering C++ Software Solutions

Question 1

What is a template type? Example?

Answer 1

A template type is a special type that can take on different types when the type is initialized.

std::vector uses a template type and can be of type int, char, etc.

Question 2

What is a “friend” declaration?

Answer 2

A friend declaration grants a function or another class access to private and protected member variables.

Question 3

What is inheritance?

Answer 3

Inheritance allows a class to inherit all member functions and data from a class into a derived class.

Question 4

True or false?

When a derived class is initialized, the derived class must construct the base class.

Answer 4

True.

Question 5

When a base class is inherited, what does/doesn’t the derived class have access to?

Answer 5

The derived class can access public members of the base class, but not private members.

Question 6

What is an initializer list and what is it used for?

Answer 6

An initializer list is the syntax to initialize the base class. It is used to:

• initialize a base class
• initialize the current class using another constructor
• initialize the default values of member variables