MCQs on Object-Oriented Programming in VB.NET | Visual Basic .NET (VB.NET)
Dive into the core concepts of VB.NET’s Object-Oriented Programming (OOP). Test your understanding of classes, objects, properties, methods, events, encapsulation, inheritance, and polymorphism with these targeted questions.
Object-Oriented Programming in VB.NET MCQs
Classes and Objects
- Which keyword is used to create a new instance of a class in VB.NET?
- a) New
- b) Class
- c) Object
- d) Create
- What is the main purpose of a class in VB.NET?
- a) To define the structure of objects
- b) To execute methods directly
- c) To handle exceptions
- d) To display output
- In VB.NET, what is the correct syntax to define a class?
- a)
Create Class ClassName - b)
Define ClassName - c)
Class ClassName - d)
New ClassName
- a)
- Which of the following is true about objects?
- a) Objects can only store methods.
- b) Objects are instances of classes.
- c) Objects are defined without classes.
- d) Objects cannot have properties.
- How do you access a method of an object in VB.NET?
- a) Object.Method()
- b) Object->Method()
- c) Method.Object()
- d) Call Method.Object
Properties, Methods, and Events
- What is a property in VB.NET?
- a) A method with no parameters
- b) A variable that stores data
- c) A member used to get or set values
- d) An event trigger
- How can you define a property in VB.NET?
- a) Using the
Dimkeyword - b) Using the
Propertykeyword - c) Using the
Functionkeyword - d) Using the
Subkeyword
- a) Using the
- What does the “Set” block of a property do?
- a) Reads the property value
- b) Updates the property value
- c) Deletes the property
- d) Initializes the property
- Which statement is true about methods in VB.NET?
- a) They are used to declare variables.
- b) They are functions or subroutines within a class.
- c) They are events triggered during runtime.
- d) They cannot accept parameters.
- How can you handle an event in VB.NET?
- a) Using the
Eventkeyword - b) Using the
Handleskeyword - c) Using the
Triggerskeyword - d) Using the
Raisekeyword
- a) Using the
Encapsulation, Inheritance, and Polymorphism
- What does encapsulation mean in VB.NET?
- a) Grouping data and methods into a class
- b) Dividing a program into modules
- c) Using multiple methods with the same name
- d) Overriding methods in subclasses
- How is inheritance implemented in VB.NET?
- a) Using the
Implementskeyword - b) Using the
Inheritskeyword - c) Using the
Overridekeyword - d) Using the
Extendskeyword
- a) Using the
- Which is a benefit of inheritance in VB.NET?
- a) Improved data encapsulation
- b) Code reusability and hierarchy
- c) Reduced class size
- d) Prevents method overriding
- What is polymorphism in VB.NET?
- a) A way to create multiple classes
- b) Allowing methods to take many forms
- c) Storing multiple values in a single variable
- d) Encapsulation of objects
- Which type of polymorphism involves method overriding?
- a) Static polymorphism
- b) Dynamic polymorphism
- c) Hybrid polymorphism
- d) Functional polymorphism
- What keyword is used to override a base class method in VB.NET?
- a) Override
- b) Overloads
- c) Extends
- d) New
- In VB.NET, which access modifier restricts access to a class and its derived classes?
- a) Private
- b) Protected
- c) Public
- d) Friend
- Which concept ensures that internal details of a class are hidden?
- a) Inheritance
- b) Encapsulation
- c) Polymorphism
- d) Overloading
- What is the term for a method that has the same name but different parameters?
- a) Method overriding
- b) Method hiding
- c) Method overloading
- d) Method extension
- What is the default access level for members of a class in VB.NET?
- a) Private
- b) Public
- c) Protected
- d) Friend
Answers
| Qno | Answer (Option with the Text) |
|---|---|
| 1 | a) New |
| 2 | a) To define the structure of objects |
| 3 | c) Class ClassName |
| 4 | b) Objects are instances of classes |
| 5 | a) Object.Method() |
| 6 | c) A member used to get or set values |
| 7 | b) Using the Property keyword |
| 8 | b) Updates the property value |
| 9 | b) They are functions or subroutines |
| 10 | b) Using the Handles keyword |
| 11 | a) Grouping data and methods into a class |
| 12 | b) Using the Inherits keyword |
| 13 | b) Code reusability and hierarchy |
| 14 | b) Allowing methods to take many forms |
| 15 | b) Dynamic polymorphism |
| 16 | a) Override |
| 17 | b) Protected |
| 18 | b) Encapsulation |
| 19 | c) Method overloading |
| 20 | a) Private |