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In: Computer Science

In Python What is a class? What is a property as it relates to a class?...

In Python

  • What is a class?
  • What is a property as it relates to a class?
  • What is a method as it relates to a class?
  • What is an object?
  • How do you create an object?
  • What is an instance variable versus a class level variable?
  • What is a constructor?
  • Is a constructor always required? Does it depend on the language?
  • What is and what is the benefit of inheritance?
  • What is and what is the benefit of encapsulation?
  • What is and what is the benefit of polymorphism?
  • What is a Getter and Setter.....what are their purpose as it relates to encapsulation?  

Solutions

Expert Solution

What is a class?

A class is a collection of method and variables. It is a blueprint that defines the data and behavior of a type.

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What is a property as it relates to a class?

Python @property is one of the built-in decorators. The main purpose of any decorator is to change your class methods or attributes in such a way so that the user of your class no need to make any change in their code.

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What is a method as it relates to a class?

A function that's part of a class is a method.

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What is an object?

It is a basic unit of class and it has the behaviour of the class.

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How do you create an object?

class ClassName():

# class definition

def main():

MyObject = ClassName()

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What is an instance variable versus a class level variable?

Instance variables are variables used for data that is unique to a particular instance.

Class Variables are variables that are shared by all instances of a class.

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What is a constructor?

A constructor is a special kind of method that Python calls when it instantiates an object using the definitions found in your class.

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Is a constructor always required? Does it depend on the language?

No, constructor is not always required.

A default (no-argument) constructor is automatically created only when you do not define any constructor yourself.

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What is and what is the benefit of inheritance?

Inheritance is a feature of object-oriented programming that allows code reusability when a class includes property of another class.

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What is and what is the benefit of encapsulation?

Encapsulation is defined as the wrapping up of data under a single unit. It is the mechanism that binds together code and the data it manipulates. Another way to think about encapsulation is, it is a protective shield that prevents the data from being accessed by the code outside this shield.

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What is and what is the benefit of polymorphism?

Polymorphism refers to the ability of OOPs programming languages to differentiate between entities with the same name efficiently.

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What is a Getter and Setter.....what are their purpose as it relates to encapsulation?  

Getter and setter are class methods that gives or sets the value of a class member. It is useful in data hiding. It shows encapsulation.

venereology answered 2 years ago
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