OOP (Object Oriented Programming) concepts are the essential & the most important concepts in any Object Oriented Programming Language. Any exam or interview of an OOP language is considered incomplete without these questions. Therefore, it becomes crucial to practice them thoroughly time to time. Certainly, we will be talking about the practice test of OOP concepts in this article. It helps in thorough revision of the subject and make the concept crystal clear. Here in this article, we will focus on Interview Questions for Object Oriented Programming in the form of MCQs Practice Test with a variety of questions such as concept-based, code-based, and scenario-based. At the end of each question, we will explore the detailed explanation of each question. In