OOPs_Quiz.md - brainchildservices/curriculum GitHub Wiki

  1. What is meant by the term OOPs ?

    OOPs refers to Object-Oriented Programming. It is the programming paradigm that is defined using objects. Objects can be considered as real-world instances of entities like class, that have some characteristics and behaviors.

  2. What is the need for OOPs?

    • OOPs helps users to understand the software easily, although they don’t know the actual implementation.
    • With OOPs, the readability, understandability, and maintainability of the code increase multifold.
    • Even very big software can be easily written and managed easily using OOPs.

  1. What are some major Object Oriented Programming languages?

    • C#
    • C++
    • Python
    • Java

  2. What are the main features of OOPs?

    • Inheritance
    • Encapsulation
    • Polymorphism
    • Abstraction

  3. Describe Inheritance?

    Inheritance is an important pillar of OOP(Object Oriented Programming). It is the mechanism in C# by which one class is allowed to inherit the features(fields and methods) of another class.

  4. Describe 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. In a different way, encapsulation is a protective shield that prevents the data from being accessed by the code outside this shield.

  5. Describe Polymorphism?

    Polymorphism means "many forms", and it occurs when we have many classes that are related to each other by inheritance.

  6. Describe Abstraction?

    Abstraction is the process of hiding certain details and showing only essential information to the user. Abstraction can be achieved with either abstract classes or interfaces

  7. Why is OOPs so popular?

    OOPs programming paradigm is considered as a better style of programming. Not only it helps in writing a complex piece of code easily, but it also allows users to handle and maintain them easily as well. Not only that, the main pillar of OOPs - Data Abstraction, Encapsulation, Inheritance, and Polymorphism, makes it easy for programmers to solve complex scenarios. As a result of these, OOPs is so popular.

  8. _______ was the first language to be developed as a purely object-oriented programming language?

    • Smalltalk
    • C++
    • C#
    • Java

  9. Who developed the first object-oriented programming language?

    • Adele Goldberg
    • Dennis Ritchie
    • Alan Kay
    • Andrea Ferro

  10. Which of the following is not a main feature of OOPs?

    • Encapsulation
    • Polymorphism
    • Exception
    • Abstraction

  11. _______ is the feature of the Object-oriented programming model which allows one class to derive features from another class?

    • Encapsulation
    • Polymorphism
    • Data hiding
    • Inheritance
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