Quiz - C# Mastery Hub

1 What is the entry point of a Windows Forms application?

Form1.cs

Program.cs

App.config

Main.cs

2 Which file is auto-generated by the Windows Forms designer?

Form1.cs

Form1.Designer.cs

Program.cs

App.config

3 What method in Program.cs starts the Windows Forms application?

Application.Run(new Form1())

Application.Start(new Form1())

Application.Execute(new Form1())

Application.Launch(new Form1())

4 What is the purpose of the [STAThread] attribute in Program.cs?

To make the application run faster

To enable single-threaded apartment mode for COM components

To disable threading

To enable multi-threading

5 What happens when you press F5 in Visual Studio with a WinForms project?

The application builds and runs

The application is published

The application is deployed

The application is closed

6 Which control is used for single-line text input?

Label

TextBox

Button

ComboBox

7 What naming prefix is recommended for a TextBox control?

lbl

txt

btn

cmb

8 What does the Anchor property do in Windows Forms?

Keeps the control centered

Keeps the control's distance fixed from an edge as the form resizes

Makes the control fill the form

Makes the control invisible

9 Which property makes a control fill an entire form or panel?

Anchor

Dock

Margin

Padding

10 How do you read the text from a TextBox in code?

txtName.Value

txtName.Text

txtName.Content

txtName.String

11 What is the most common way to wire up a Button click event?

Double-click the button in the designer

Write code in the constructor

Use the Properties panel

Use the Load event

12 Which event fires when a form first loads?

Click

Load

TextChanged

FormClosing

13 What does the FormClosing event allow you to do?

Prevent the form from closing

Close the form immediately

Minimize the form

Maximize the form

14 Which event fires when text in a TextBox changes?

Click

Load

TextChanged

SelectedIndexChanged

15 What is the signature of a typical event handler in WinForms?

void HandlerName(object sender, EventArgs e)

void HandlerName(EventArgs e)

bool HandlerName(object sender, EventArgs e)

void HandlerName()

16 Which control is used to create a menu bar in Windows Forms?

ToolStrip

MenuStrip

ContextMenuStrip

StatusStrip

17 What method displays a MessageBox with an OK button?

MessageBox.Display()

MessageBox.Show()

MessageBox.Open()

MessageBox.Popup()

18 What does OpenFileDialog.ShowDialog() return?

DialogResult.OK or DialogResult.Cancel

The file path

The file contents

A boolean value

19 How do you access the selected file from OpenFileDialog?

openDialog.SelectedFile

openDialog.FileName

openDialog.FilePath

openDialog.Path

20 What does setting DialogResult = OK do in a custom form?

Closes the form and returns OK to the caller

Minimizes the form

Maximizes the form

Hides the form

21 What control is used to display tabular data in Windows Forms?

ListBox

DataGridView

ComboBox

ListView

22 How do you bind a DataGridView to a DataTable?

dgv.DataSource = table

dgv.DataBind(table)

dgv.SetDataSource(table)

dgv.Bind(table)

23 What property of a ComboBox controls what the user sees?

ValueMember

DisplayMember

TextMember

ShowMember

24 What property of a ComboBox controls the underlying value?

ValueMember

DisplayMember

TextMember

ShowMember

25 What is the purpose of BindingSource in Windows Forms?

To simplify data binding between controls and data sources

To create database connections

To format data for display

To validate user input

26 How do you open a second form without making it modal?

form.Show()

form.ShowDialog()

form.Open()

form.Display()

27 How do you open a second form modally?

form.Show()

form.ShowDialog()

form.Open()

form.Display()

28 How do you get data back from a child form?

Using public properties on the child form

Using static variables

Using global variables

Using the Windows registry

29 What does the using statement do when creating a modal form?

Ensures the form is disposed properly

Makes the form run faster

Prevents the form from closing

Makes the form stay on top

30 What property makes a form an MDI container?

IsMdiContainer

IsMdiParent

MdiContainer

MdiParent

31 Which method is used to execute INSERT, UPDATE, or DELETE commands?

ExecuteReader()

ExecuteNonQuery()

ExecuteScalar()

ExecuteTable()

32 What event is used to refresh the DataGridView after saving?

Click

Load

Custom refresh method

FormClosing

33 How do you check if a user confirmed a delete operation?

MessageBox.Show with Yes/No buttons

MessageBox.Show with OK/Cancel buttons

MessageBox.Show with Yes/No/Cancel buttons

MessageBox.Show with OK only

34 What property tracks the currently selected row in a DataGridView?

CurrentRow

SelectedRow

ActiveRow

FocusedRow

35 How do you clear a TextBox in Windows Forms?

txtBox.Text = ''

txtBox.Clear()

txtBox.Empty()

txtBox.Reset()

Windows Forms Quiz

1 What is the entry point of a Windows Forms application?

2 Which file is auto-generated by the Windows Forms designer?

3 What method in Program.cs starts the Windows Forms application?

4 What is the purpose of the [STAThread] attribute in Program.cs?

5 What happens when you press F5 in Visual Studio with a WinForms project?

6 Which control is used for single-line text input?

7 What naming prefix is recommended for a TextBox control?

8 What does the Anchor property do in Windows Forms?

9 Which property makes a control fill an entire form or panel?

10 How do you read the text from a TextBox in code?

11 What is the most common way to wire up a Button click event?

12 Which event fires when a form first loads?

13 What does the FormClosing event allow you to do?

14 Which event fires when text in a TextBox changes?

15 What is the signature of a typical event handler in WinForms?

16 Which control is used to create a menu bar in Windows Forms?

17 What method displays a MessageBox with an OK button?

18 What does OpenFileDialog.ShowDialog() return?

19 How do you access the selected file from OpenFileDialog?

20 What does setting DialogResult = OK do in a custom form?

21 What control is used to display tabular data in Windows Forms?

22 How do you bind a DataGridView to a DataTable?

23 What property of a ComboBox controls what the user sees?

24 What property of a ComboBox controls the underlying value?

25 What is the purpose of BindingSource in Windows Forms?

26 How do you open a second form without making it modal?

27 How do you open a second form modally?

28 How do you get data back from a child form?

29 What does the using statement do when creating a modal form?

30 What property makes a form an MDI container?

31 Which method is used to execute INSERT, UPDATE, or DELETE commands?

32 What event is used to refresh the DataGridView after saving?

33 How do you check if a user confirmed a delete operation?

34 What property tracks the currently selected row in a DataGridView?

35 How do you clear a TextBox in Windows Forms?