A teacher creates a base class Person in C# with properties like Name and Age. They then create a Teacher class and a Student class that both inherit from the Person class. What advantage does inheritance provide in this situation?

Inheritance provides code reusability and reduces duplication by allowing Teacher and Student classes to share common properties from the Person class.

Inheritance requires all classes to implement the same methods.

Inheritance allows for multiple inheritance from different classes.

Inheritance increases the complexity of the code without benefits.

A company uses a Shape class as a base class with a method called Draw(). They then create derived classes like Circle, Rectangle, and Triangle, each overriding the Draw() method to display their specific shapes. What is the benefit of using polymorphism in this case?

It enables code reusability and flexibility by allowing different shapes to be treated uniformly.

It increases the complexity of the code by requiring multiple method calls.

It restricts the use of different shapes to a single method.

It simplifies the code by removing the need for shape-specific methods.

In a BankAccount class, the balance is stored in a private field. The class provides methods like Deposit() and Withdraw() to modify the balance. Why is the balance stored as a private field?

The balance is private t o ensure that it can only be updated using the provided methods.

The balance is private to make it easier to read and understand.

The balance is stored in a separate database for security reasons.

The balance is public to allow easy access for all users.

A Vehicle class has properties like Speed and Color. A Car class inherits from Vehicle and adds a new property called NumberOfDoors. What does inheritance allow the Car class to do?

The Car class can use the Vehicle class properties directly.

The Car class must redefine all properties of Vehicle.

The Car class cannot access any methods from Vehicle.

The Car class can only have its own properties.

A programmer creates a class Book with private fields Title and Author and provides public methods SetTitle() and SetAuthor() to update the fields. What is the advantage of using this approach?

It ensures the fields are not accidentally modified.

Increased complexity in code management.

Direct access to private fields for all users.

No need for setter methods in the class.

A Car class inherits from a Vehicle class. The Vehicle class has a property called Speed. What does the Car class gain from inheritance?

The Car class gains access to the Speed property from the Vehicle class.

The Car class cannot access any properties from the Vehicle class.

The Car class gains a new Speed property that overrides the Vehicle class.

The Car class loses the Speed property from the Vehicle class.

A Student class has private data like Name and Age. To access this data, the class provides methods like GetName() and GetAge(). Why does the class use methods to access the data??

To keep the data safe from being changed directly.

To eliminate the need for data validation.

To make the code more complex and difficult to read.

To allow direct access to private data.

You want to show the text "Hello, World!" in a TextBox when the form is loaded in C# Windows Application form . Which code should you use?

textBox1.Text = "Hello, World!";

textBox1.Text = 'Goodbye, World!';

textBox1.Text = 'Hello, Universe!';

textBox1.Text = 'Welcome, World!';

You want to display "Welcome to C#" in a Label when the user clicks a button in C# Windows Application form . What is the correct way to do this in the button click event?

label1.Content = 'Welcome to C#';

label1.DisplayText = 'Welcome to C#';

You want to change the text of a Label when a button is clicked in C# Windows Application form . Which control should be used to handle this event?

Button control to handle the Click event.

ComboBox control to handle the SelectionChanged event.

TextBox control to handle the Input event.

ListBox control to handle the ItemSelected event.

You want the TextBox to display the text "Enter your name" when the form opens in C# Windows Application form . Which code would you use in the Form_Load event?

textBox1.Text = "Enter your name";

textBox1.SetText("Enter your name");

textBox1.Text = "Please enter your name";

textBox1.Content = "Enter your name";

You are using IntelliSense in Visual Studio 2022 while coding. What is the main purpose of IntelliSense?

The main purpose of IntelliSense is to assist developers by providing code suggestions and autocompletion.

To compile code into executable files.

To manage project files and dependencies.

To provide debugging tools for runtime errors.

COMP10 - OOP and Windows Form

Authored by Michael Atienza

Computers

10th Grade

Used 6+ times

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30 questions

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MULTIPLE CHOICE QUESTION

1 min • 2 pts

What is the control in C# Windows application form that displays text with the label but unlike the label, this will allow input from the users?

Button

Label

TextBox

CheckBox

MULTIPLE CHOICE QUESTION

1 min • 1 pt

What control in C# Windows Application form shows a list of choices that is presented vertically in a single column?

CheckBox

RadioButton

ListBox

ComboBox

MULTIPLE CHOICE QUESTION

1 min • 1 pt

What control in C# Windows Application form shows choices through a drop-down menu?

CheckBox

ComboBox

RadioButton

ListBox

MULTIPLE CHOICE QUESTION

1 min • 1 pt

What control in C# Windows Application form displays text or message for the use of other controls?

Label

TextBox

Button

ComboBox

MULTIPLE CHOICE QUESTION

1 min • 1 pt

What control in C# Windows Application form executes a specific action and performs commands written in the code editor?

Button

ComboBox

TextBox

Label

MULTIPLE CHOICE QUESTION

1 min • 1 pt

What naming convention is used for a button control in C# Windows Application form?

btn[DescriptiveName]

ctrl[ButtonName]

button[DescriptiveName]

btnControl[Name]

MULTIPLE CHOICE QUESTION

1 min • 1 pt

What are actions which include the clicking of the mouse button, dragging with the mouse, drag-drop and even clicking of pictures?

Form

Events

Behaviors

Objects

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COMP10 - OOP and Windows Form

What is the control in C# Windows application form that displays text with the label but unlike the label, this will allow input from the users?

What control in C# Windows Application form shows a list of choices that is presented vertically in a single column?

What control in C# Windows Application form shows choices through a drop-down menu?

What control in C# Windows Application form displays text or message for the use of other controls?

What control in C# Windows Application form executes a specific action and performs commands written in the code editor?

What naming convention is used for a button control in C# Windows Application form?

What are actions which include the clicking of the mouse button, dragging with the mouse, drag-drop and even clicking of pictures?

What is the process of hiding all the details on how a piece of program is written and only includes what is necessary to understand how the program is used?

What is a way of organizing classes so that classes with properties in common can be grouped and defined once for all classes?

What is this object oriented programming principle when one method name is used as an instruction that can perform different actions?

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