C++ OOP

Question 1

What is the area of a circle?

Answer 1

Pi (radius)squared

Question 2

What is the input symbol for a double?

Answer 2

“%f”

Question 3

What is Pi?

Answer 3

3.14

Question 4

How do you do inheritance in cpp?

Answer 4

class className: public classname(to inherit), public classname(to inherit){
}

Question 5

If a child class inherits from a parent class, how does it call a function specific to the parent class, even if it is inheriting from multiple parents?

Answer 5

parentClassName::method() ;

Question 6

what is the :: operator and what is it used for?

Answer 6

It is called the scope operator and it is used in multiple inheritance to specify the class and which function from said specified class to called.

Question 7

What is an abstract class?

Answer 7

An abstract class is a special type of class from which objects cannot be directly created but rather it meant for other classes to inherit from.

Question 8

What are 2, characteristics of abstract classes?

Answer 8

-> You cannot create an object directly from it
-> It can contain pure virtual functions

Question 9

How is a virtual function written in cpp?

Answer 9

virtual returntype functionName() = 0 ;

Question 10

What are the core concepts of OOP?

Answer 10

A-PIE
Abstraction
Polymorphism
Inheritance
Encapsulation

Question 11

What are the 3 main access modifies in cpp and what are their scopes?

Answer 11

Protected -> accessible within a class, and any class that inherits from it

Private -> accesible only within the class

Public -> accessible anywhere in the code