MCQs on Introduction to Forms and Controls | Visual Basic .NET (VB.NET)

Master Windows Forms applications with these 30 handpicked MCQs. Dive into controls like TextBox, Label, Button, and event handling. Perfect for students and developers aiming to sharpen their VB.NET skills.

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MCQs: Introduction to Forms and Controls

Creating Your First Windows Forms Application

1. Which namespace is primarily used for creating Windows Forms in VB.NET?
   a) System.Windows.Forms
   b) System.Windows.UI
   c) System.Forms.App
   d) System.Application.Forms
2. What is the default file extension for a Windows Forms project in VB.NET?
   a) .vbproj
   b) .csproj
   c) .wfproj
   d) .vbform
3. What is the entry point method for a Windows Forms application?
   a) Main()
   b) Start()
   c) Run()
   d) Init()
4. Which class is used to represent a Windows Form?
   a) Window
   b) Form
   c) Application
   d) Control
5. What is the primary method used to display a Windows Form?
   a) Show()
   b) Display()
   c) Render()
   d) Present()

Common Controls: TextBox, Label, Button

6. Which control is used to display text that cannot be edited by the user?
   a) TextBox
   b) Label
   c) Button
   d) ListBox
7. How do you set the initial text in a TextBox?
   a) TextBox.Text = “value”
   b) TextBox.SetText(“value”)
   c) TextBox.Value = “value”
   d) TextBox.TextField = “value”
8. Which event is triggered when a user clicks a Button?
   a) ButtonPressed
   b) Click
   c) ActionPerformed
   d) OnClick
9. What property of a Label control determines its displayed text?
   a) TextValue
   b) LabelText
   c) Text
   d) Content
10. What is the default behavior of the Tab key in a TextBox?
    a) Moves to the next TextBox
    b) Inserts a tab character
    c) Does nothing
    d) Triggers an event

Handling Events (Click, TextChanged)

11. Which method is used to handle the Click event of a Button?
    a) AddHandler
    b) AssignEvent
    c) SetHandler
    d) HandleEvent
12. What is the default signature of a Click event handler?
    a) Private Sub Button_Click()
    b) Public Sub ButtonClick(ByVal sender As Object)
    c) Private Sub Button_Click(ByVal sender As Object, ByVal e As EventArgs)
    d) Private Function ButtonClick(ByVal sender As Object, ByVal e As EventArgs)
13. The TextChanged event is fired when:
    a) A Button is clicked
    b) The text of a control changes
    c) A form is resized
    d) A control is focused
14. How do you attach an event handler to a control in code?
    a) Control.Event = AddressOf HandlerMethod
    b) AddHandler Control.Event, AddressOf HandlerMethod
    c) SetHandler(Control.Event, HandlerMethod)
    d) AttachEvent(Control.Event, HandlerMethod)
15. What is the main purpose of the TextChanged event in a TextBox?
    a) Monitor text input dynamically
    b) Detect form submission
    c) Validate form data
    d) Trigger on focus change

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Advanced Topics on Controls

16. Which property determines if a control is visible to the user?
    a) Enabled
    b) Visible
    c) Displayed
    d) Shown
17. How can you disable user interaction with a Button?
    a) Set Enabled to False
    b) Set Active to False
    c) Set Usable to False
    d) Set Available to False
18. What property of a TextBox sets a password character mask?
    a) TextMask
    b) MaskChar
    c) PasswordChar
    d) HiddenChar
19. What does the Anchor property of a control define?
    a) The control’s docking position
    b) The control’s resizing behavior
    c) The control’s alignment
    d) The control’s visibility
20. Which property of a Label enables multiline text display?
    a) Multiline
    b) WrapText
    c) AutoSize
    d) WordWrap

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General Questions on Forms and Controls

21. What is the function of the Dock property in a control?
    a) Adjust size based on parent container
    b) Align control to the form edges
    c) Fix position on the form
    d) Handle focus priority
22. What event is triggered when a form is closed?
    a) Closing
    b) FormClosed
    c) End
    d) Dispose
23. Which property sets the title of a form?
    a) Title
    b) Caption
    c) Text
    d) Header
24. How can you programmatically close a Windows Form?
    a) Form.Close()
    b) Form.End()
    c) Form.Terminate()
    d) Form.Dispose()
25. What property is used to control the transparency of a form?
    a) TransparentValue
    b) Opacity
    c) AlphaLevel
    d) Transparency
26. How do you make a TextBox read-only?
    a) Set ReadOnly to True
    b) Set Editable to False
    c) Set Lock to True
    d) Set Writable to False
27. Which event is triggered when a form is loaded?
    a) Initialize
    b) Load
    c) FormLoad
    d) Activated
28. How do you add a tooltip to a control?
    a) Use the Tooltip property
    b) Attach a ToolTip component
    c) AddHandler Tooltip.Text
    d) Set Hint property
29. What does the AutoSize property do for a Label?
    a) Automatically adjusts the size to fit the text
    b) Resizes based on parent container
    c) Locks the current size
    d) Dynamically changes font size
30. Which control would you use for accepting multiline text input?
    a) TextBox with Multiline enabled
    b) Label with WrapText enabled
    c) RichTextBox
    d) Both a and c

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Answers Table

Qno	Answer (Option with Text)
1	a) System.Windows.Forms
2	a) .vbproj
3	a) Main()
4	b) Form
5	a) Show()
6	b) Label
7	a) TextBox.Text = “value”
8	b) Click
9	c) Text
10	a) Moves to the next TextBox
11	b) AddHandler
12	c) Private Sub Button_Click(ByVal sender As Object, ByVal e As EventArgs)
13	b) The text of a control changes
14	b) AddHandler Control.Event, AddressOf HandlerMethod
15	a) Monitor text input dynamically
16	b) Visible
17	a) Set Enabled to False
18	c) PasswordChar
19	b) The control’s resizing behavior
20	d) WordWrap
21	b) Align control to the form edges
22	b) FormClosed
23	c) Text
24	a) Form.Close()
25	b) Opacity
26	a) Set ReadOnly to True
27	b) Load
28	b) Attach a ToolTip component
29	a) Automatically adjusts the size to fit the text
30	d) Both a and c