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OOPs Concepts in VB.Net Quiz

Description: OOPs Concepts in VB.Net Quiz
Number of Questions: 15
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Tags: .net vb oop
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Which control is an example of an object in VB.NET?

  1. Button

  2. Label

  3. Textbox

  4. Both a and b.

  5. All of the above.


Correct Option: E

Which of the following is part of an object?

  1. Methods

  2. Properties

  3. Instances

  4. Both a and b.

  5. All of the above.


Correct Option: D

Which is true about objects?

  1. Objects are used to create classes.

  2. Objects are analogous to blueprints.

  3. Objects combine actions and data.

  4. Both a and b.

  5. All of the above.


Correct Option: C

Properties are used to represent:

  1. actions.

  2. classes.

  3. data.

  4. events.

  5. instances.


Correct Option: C

Methods are used to represent:

  1. actions.

  2. classes.

  3. data.

  4. events.

  5. instances.


Correct Option: A

The term instantiation refers to the creation of:

  1. a class from a blueprint.

  2. an object from a class.

  3. a method from an object.

  4. a property from a method.

  5. a blueprint from a property.


Correct Option: B

AI Explanation

To answer this question, you need to understand the concept of instantiation in object-oriented programming.

Option A) a class from a blueprint - This option is incorrect. Instantiation does not refer to the creation of a class from a blueprint. A class is a blueprint or template for creating objects.

Option B) an object from a class - This option is correct. Instantiation refers to the creation of an object from a class. When you instantiate an object, you create a unique instance of that class with its own set of attributes and behaviors.

Option C) a method from an object - This option is incorrect. Instantiation does not refer to the creation of a method from an object. Methods are defined within a class and are used to perform actions or operations on objects.

Option D) a property from a method - This option is incorrect. Instantiation does not refer to the creation of a property from a method. Properties are attributes or data associated with an object, while methods are functions that define the behavior of an object.

Option E) a blueprint from a property - This option is incorrect. Instantiation does not refer to the creation of a blueprint from a property. A blueprint, or class, defines the structure and behavior of an object, while a property is a specific attribute of an object.

The correct answer is B) an object from a class. This option is correct because instantiation refers to the creation of an object from a class.

Anything in VB.NET that has a property or method is:

  1. a class.

  2. a control.

  3. an object.

  4. Both a and b.

  5. All of the above.


Correct Option: C

Which feature is needed to make a programming language object oriented?

  1. Encapsulation

  2. Inheritance

  3. Polymorphism

  4. Both a and b.

  5. All of the above.


Correct Option: E

We should think of the practice of object-oriented programming as:

  1. a simple answer to the complex problem of creating software.

  2. an incremental improvement to the problem of creating software.

  3. the way to get rid of a werewolf.

  4. Both a and b.

  5. All of the above.


Correct Option: B

AI Explanation

To answer this question, let's go through each option to understand why it is correct or incorrect:

Option A) A simple answer to the complex problem of creating software - This option is incorrect because object-oriented programming (OOP) is not a simple answer to the complex problem of creating software. While OOP provides a structured approach to software development, it does not solve all the complexities involved in creating software.

Option B) An incremental improvement to the problem of creating software - This option is correct because object-oriented programming is considered an incremental improvement to the problem of creating software. OOP allows for better organization, modularity, and reusability of code, making software development more manageable and efficient.

Option C) The way to get rid of a werewolf - This option is incorrect and unrelated to the practice of object-oriented programming. It is likely a joke or unrelated statement.

Option D) Both a and b - This option is incorrect because option A is incorrect. Object-oriented programming is not a simple answer to the complex problem of creating software.

Option E) All of the above - This option is incorrect because option A is incorrect. Object-oriented programming is not a simple answer to the complex problem of creating software.

The correct answer is B) An incremental improvement to the problem of creating software. This option is correct because object-oriented programming is a structured approach that improves software development by providing better organization, modularity, and reusability of code.

Encapsulation makes it easier to:

  1. reuse and modify existing modules of code.

  2. write and read code by sharing method names.

  3. hide and protect data from external code.

  4. Both a and b.

  5. All of the above.


Correct Option: C

The standard for designing a field is that it be defined as a:

  1. private method.

  2. public method.

  3. private variable.

  4. public variable.

  5. None of the above.


Correct Option: E

AI Explanation

To answer this question, we need to understand the concept of fields in programming.

In programming, a field is a variable that belongs to a class or object. It represents the state or data associated with that class or object. Fields can have different access modifiers, such as public or private, which determine their accessibility from other parts of the program.

Option A) private method - This option is incorrect because a field is not defined as a method. Methods are used to define behavior or actions that can be performed on an object, while fields represent the data or state of an object.

Option B) public method - This option is incorrect for the same reason as option A. Fields are not defined as methods.

Option C) private variable - This option is incorrect because a field can be a variable, but it is not necessarily a private variable. The accessibility of a field can vary depending on the design requirements.

Option D) public variable - This option is incorrect for the same reason as option C. A field can be a variable, but it is not necessarily a public variable.

Option E) None of the above - This option is correct because a field is not specifically defined as a public or private method, or as a public or private variable. The accessibility and definition of a field depend on the specific design requirements of the program.

The correct answer is E) None of the above.

What is the syntax for making a property read-only?

  1. Property Read propertyname As datatype

  2. Read Property propertyname As datatype

  3. ReadOnly Property propertyname As datatype

  4. Read-Only Property propertyname As datatype

  5. RO Property propertyname As datatype


Correct Option: C

The Get procedure of a property acts like:

  1. an event.

  2. a function.

  3. a variable.

  4. Both a and b.

  5. All of the above.


Correct Option: B

A method in a class is:

  1. a sub procedure.

  2. a function.

  3. an event.

  4. Both a and b.

  5. All of the above.


Correct Option: D

AI Explanation

To answer this question, we need to understand the different types of methods in a class.

Option A) a sub procedure - This option is incorrect. A sub procedure is a type of method that performs a specific task within a class, but it does not return a value.

Option B) a function - This option is incorrect. A function is also a type of method that performs a specific task within a class, but it does return a value.

Option C) an event - This option is incorrect. An event is not a type of method, but rather a mechanism that allows objects to communicate with each other.

Option D) Both a and b - This option is correct. A method in a class can be both a sub procedure and a function, depending on whether it returns a value or not.

Option E) All of the above - This option is incorrect. While option D is correct, option E includes option C, which is incorrect.

Therefore, the correct answer is option D. A method in a class can be both a sub procedure and a function.

How many constructors can a class have?

  1. 1

  2. 2

  3. 3

  4. All of the above.


Correct Option: D
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