Object Oriented (Unit 2)

Which statement best describes the relationship between a class and an object?

• A class is an instance of an object

• An object is a blueprint of a class

• A class is a blueprint, and an object is an instance of it

• Both are the same

In C#, what keyword is used to create an object from a class?

• class

• new

• object

• this

What is the return type of a constructor in C#?

• void

• int

• object

• It has no return type

If a developer wants to initialize fields automatically when creating an object, which feature should they use?

• Methods

• Constructors

• Properties

• Delegates

You create multiple constructors with different parameter lists. This is an example of:

• Encapsulation

• Overloading

• Overriding

• Hiding

Which accessor in a property retrieves the value of a field?

• get

• set

• return

• this

Which of the following is a value type in C#?

• string

• int

• object

• class

Copying a reference type variable creates:

• Two references to the same object

• Two different objects

• A null reference

• A compile error

Which symbol is used in C# to denote inheritance?

• ;

• =

• -

• :

Abstract classes differ from interfaces because:

• They can provide partial implementation

• They cannot define methods

• They allow multiple inheritance

• They cannot be inherited