Introduction
Object-oriented programming (OOP) is a paradigm that helps build reliable designs that can guarantee scalability without blocking the main thread in a program. As we all know, OOP follows the best practices to build systems and is a primary component of programming languages. This makes it essential for every interview candidate to have a good knowledge of OOPs. In this article, we have compiled the top OOP questions and answers to help you ace your interview. Read on to know more!
Top OOPs Interview Questions and Answers
1. What is OOP?
OOP or object-oriented programming is a programming model in which software is organized around data and objects. An object is a collection of data and the methods operating on that data.
2. Why do we need OOP?
OOP manages code better as it reduces the gap between the language spoken by the developers and understood by users. Because of encapsulation, the methods remain the same, and it is easy to change the underlying representation. This facilitates easy maintenance and makes OOP a great choice for managing big software.
3. What are some OOP languages?
- Python
- JavaScript
- Java
- C++
- C#
- Ruby
- TypeScript
- Kotlin
- R
- PHP
4. What are the other programming paradigms apart from OOP?
A programming paradigm defines the style in which one can organize a given program or programming language. Programming paradigms can be divided into:
Imperative programming
It allows programmers to dictate the step-by-step logic of the program. It is further divided into:
- Procedural programming
- Object-Oriented Programming or OOP
- Parallel Programming
Declarative programming
It pays attention to the execution of a program rather than how it should be executed. The logic of a computation is decided without considering its control flow. It can be further divided into:
- Logical programming
- Functional programming
- Database programming
5. What is Structured Programming?
Programs that have a completely controlled flow come under Structured Programming. Structured programming has a block with a set of rules with a definitive control flow. Most programming paradigms, including OOP, Structured Programming.
6. What are the features of OOP?
Polymorphism: This feature allows the addition of different meanings to a single component.
Encapsulation: It refers to enclosing the data/variables and the methods into a class for data manipulation.
Inheritance: It allows a class to inherit the properties and methods of the parent class, the base class, or the super class.
Data Abstraction: This feature lets you remove unnecessary elements to make the program simpler.
7. What are the advantages of OOP?
- Offers enhanced code reusability
- Code easier to update and maintain
- Restricts data access and offers better security
- Can be implemented quickly and easily redesigned
8. What are the disadvantages of OOPs?
- OOPs need extensive planning.
- It takes time to solve a problem with OOP.
- OOP is not a great choice for small problems.
- It requires intensive testing.
9. What makes OOP so popular?
Top OOPs Interview Questions and Answers
Top OOP(Object-oriented programming) questions and answers to help you ace your interview. Read on to know more!
PublishedJanuary 25, 2024
CategoryOOPs interview qna
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