Question

Why is it more feasible to use Objects and object oriented programming as compared to using method based programs? What are the disadvantages of using only methods in your programs.

Answer 1

Advantages of using Objects and Object Oriented programming as compared to method based programs are:-

1. OOP(Object Oriented Programming) is very close to the real world that uses classes and objects to group similar data for a better understanding and modification of the code. It is easier to conceptualize as compared to method based programs.  
2. In OOP(Object Oriented Programming) we can use Inheritance which increases code reusability and decreases the code length. A child class can inherit the properties and behaviours(objects and functions) from its parent class, therefore we don't need to write the same functions each and every time from the scratch. This is not possible in method based programming.
3. We can use the concept of Encapsulation in OOP, which helps in data hiding and keeping it private by restricting its access. This is also not possible if there is no implementation of objects.
4. OOP also provides us with Polymorphism by overloading or overriding the functions. It helps the programmers to reuse the code and saves a lot of time. Once the code is written and tested, we can use it several times by just changing its parameters. Therefore, it's not needed to write and test the functions each and every time from the scratch.
5. OOP introduces shallow, deep and object copy which is missing in method based programs. Therefore functionalities can be copied according to the situations.
6. Introduces the concept of observer pattern so that if a particular object within a class got modified then extended data member which is dependent on that object gets updated without any further modification of the code.

Disadvantages of using only methods in our programs are:-

1. We won't be able to inherit functionalities and therefore code length will increase.
2. We won't be able to protect our private data as access can't be restricted if we use only methods in our programs.
3. Code complexity can increase and it may become difficult to debug and manage if there are no links between the similar functions and is not defined into manageable chunks.