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OOP Exam Questions With Correct
Answers.
What is OOP? - Answer✔Object-oriented programming (OOP) is a programming language
model organized around objects rather than "actions" and data rather than logic. Historically, a
program has been viewed as a logical procedure that takes input data, processes it, and produces
output data.
4 Basic Concepts of OOP - Answer✔Abstraction.
Encapsulation.
Inheritance.
Polymorphism.
What is a class? - Answer✔A set or category of things having some property or attribute in
common and differentiated from others by kind, type, or quality.
What is an object? - Answer✔Objects are created from Classes, in C#, is an instance of a class
that is created dynamically. Object is also a keyword that is an alias for the predefined type
System.
What is encapsulation? - Answer✔Encapsulation is the packing of data and functions into a
single component. The features of encapsulation are supported using classes in most object-
oriented programming languages, although other alternatives also exist.
It allows selective hiding of properties and methods in an object by building an impenetrable
wall to protect the code from accidental corruption.
What is polymorphism? - Answer✔In programming languages and type theory, polymorphism is
the provision of a single interface to entities of different types.
A polymorphic type is a type whose operations can also be applied to values of some other type,
or types.
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OOP Exam Questions With Correct
Answers.
What is OOP? - Answer✔Object-oriented programming (OOP) is a programming language
model organized around objects rather than "actions" and data rather than logic. Historically, a
program has been viewed as a logical procedure that takes input data, processes it, and produces
output data.
4 Basic Concepts of OOP - Answer✔Abstraction.
Encapsulation.
Inheritance.
Polymorphism.
What is a class? - Answer✔A set or category of things having some property or attribute in
common and differentiated from others by kind, type, or quality.
What is an object? - Answer✔Objects are created from Classes, in C#, is an instance of a class
that is created dynamically. Object is also a keyword that is an alias for the predefined type
System.
What is encapsulation? - Answer✔Encapsulation is the packing of data and functions into a
single component. The features of encapsulation are supported using classes in most object-
oriented programming languages, although other alternatives also exist.
It allows selective hiding of properties and methods in an object by building an impenetrable
wall to protect the code from accidental corruption.
What is polymorphism? - Answer✔In programming languages and type theory, polymorphism is
the provision of a single interface to entities of different types.
A polymorphic type is a type whose operations can also be applied to values of some other type,
or types.
1|Page
