What is the purpose of event handling in ASP.NET Web Forms?
A) To respond to user actions and interactions with controls
B) To manage database connections
C) To handle server-side rendering
D) To perform client-side scripting
Answer: A) To respond to user actions and interactions with controls
Which method is commonly used to bind an event handler to a control’s event in ASP.NET Web Forms?
A) Adding an event handler in the markup using the OnClick attribute
B) Using the RegisterEvent method
C) Setting the EventHandler property
D) Calling the AddEventListener method
Answer: A) Adding an event handler in the markup using the OnClick attribute
What is the default event that is triggered when a user clicks a Button control?
A) Click
B) Load
C) Change
D) Submit
Answer: A) Click
How can you define a server-side event handler in code-behind for a TextBox control?
A) By creating a method with the signature void TextBox1_TextChanged(object sender, EventArgs e)
B) By creating a method with the signature void TextBox1_Click(object sender, EventArgs e)
C) By creating a method with the signature void TextBox1_Load(object sender, EventArgs e)
D) By creating a method with the signature void TextBox1_Submit(object sender, EventArgs e)
Answer: A) By creating a method with the signature void TextBox1_TextChanged(object sender, EventArgs e)
Which event is fired when a user selects a new item in a DropDownList control?
A) SelectedIndexChanged
B) TextChanged
C) Click
D) ItemCommand
Answer: A) SelectedIndexChanged
How do you ensure that a DropDownList control triggers its event when the user changes the selection?
A) By setting the AutoPostBack property to true
B) By setting the Enabled property to true
C) By setting the CausesValidation property to true
D) By setting the Text property
Answer: A) By setting the AutoPostBack property to true
What is the purpose of the CausesValidation property in ASP.NET Web Forms?
A) To specify whether the control triggers validation when it causes a postback
B) To enable or disable client-side validation
C) To manage the visibility of controls
D) To set default values for controls
Answer: A) To specify whether the control triggers validation when it causes a postback
What method should be used to handle the Click event of a Button control?
A) Button_Click
B) Button_Action
C) Button_Clicked
D) Button_Event
Answer: A) Button_Click
Which event is commonly used to initialize controls on the page?
A) Page_Init
B) Page_Load
C) Page_PreRender
D) Page_Unload
Answer: A) Page_Init
How do you attach an event handler to an event in ASP.NET Web Forms?
A) By assigning the event handler method to the control’s event property in the code-behind file
B) By using the AddEventHandler method in markup
C) By configuring event handlers in the web.config file
D) By using the RegisterEventHandler method
Answer: A) By assigning the event handler method to the control’s event property in the code-behind file
Which event is triggered when a user changes the text in a TextBox control?
A) TextChanged
B) Click
C) Load
D) Change
Answer: A) TextChanged
What is the correct way to define an event handler for the SelectedIndexChanged event of a DropDownList control?
A) void DropDownList1_SelectedIndexChanged(object sender, EventArgs e)
B) void DropDownList1_IndexChanged(object sender, EventArgs e)
C) void DropDownList1_Selected(object sender, EventArgs e)
D) void DropDownList1_Change(object sender, EventArgs e)
Answer: A) void DropDownList1_SelectedIndexChanged(object sender, EventArgs e)
Which event handler method is executed when a user submits a form using the Button control?
A) Button_Click
B) Button_Submit
C) Button_Action
D) Button_Press
Answer: A) Button_Click
How do you prevent a Button control from causing a postback when clicked?
A) By setting the CausesValidation property to false
B) By setting the AutoPostBack property to false
C) By setting the EnableViewState property to false
D) By setting the Enabled property to false
Answer: A) By setting the CausesValidation property to false
What is the purpose of the Page_Load event in the ASP.NET page lifecycle?
A) To handle the processing of the page after all controls have been initialized
B) To initialize controls and set up initial data
C) To render the page content to the client
D) To handle page redirection
Answer: B) To initialize controls and set up initial data
Which event is fired when a page is first requested and initialized?
A) Page_Init
B) Page_Load
C) Page_PreRender
D) Page_Unload
Answer: A) Page_Init
How can you handle multiple events for a single control in ASP.NET Web Forms?
A) By defining separate methods for each event and assigning them to the control’s event properties
B) By using a single method to handle all events
C) By configuring events in the web.config file
D) By using client-side JavaScript to handle events
Answer: A) By defining separate methods for each event and assigning them to the control’s event properties
What is the role of the Page_PreRender event?
A) To allow final adjustments to the page before it is rendered
B) To initialize page controls
C) To handle user interactions
D) To save page data
Answer: A) To allow final adjustments to the page before it is rendered
What is the purpose of the Page_Unload event?
A) To perform cleanup operations after the page has been fully rendered and sent to the client
B) To initialize controls on the page
C) To handle user input
D) To manage session state
Answer: A) To perform cleanup operations after the page has been fully rendered and sent to the client
How do you handle a server-side event that is raised by a GridView control?
A) By creating a method with the appropriate event signature and assigning it in the OnRowCommand event
B) By configuring the event in the GridView properties
C) By using client-side scripts
D) By handling the event in the Page_Load method
Answer: A) By creating a method with the appropriate event signature and assigning it in the OnRowCommand event
Which event occurs after the page’s content is rendered but before it is sent to the client?
A) Page_PreRender
B) Page_Load
C) Page_Init
D) Page_Unload
Answer: A) Page_PreRender
How can you ensure that a CheckBox control triggers its event when its checked state changes?
A) By setting the AutoPostBack property to true
B) By setting the Enabled property to true
C) By using client-side validation
D) By setting the Text property
Answer: A) By setting the AutoPostBack property to true
What is the significance of the Page_Load method in relation to event handling?
A) It is used to execute code that needs to run every time the page is requested
B) It handles events triggered by controls
C) It initializes page controls
D) It manages data binding
Answer: A) It is used to execute code that needs to run every time the page is requested
Which property would you set to ensure that a TextBox control triggers a postback event when the text is changed?
A) AutoPostBack
B) Enabled
C) Text
D) ViewState
Answer: A) AutoPostBack
How can you handle the event of a user clicking on a LinkButton control?
A) By defining a method with the signature void LinkButton_Click(object sender, EventArgs e)
B) By creating a method with the signature void LinkButton_Command(object sender, EventArgs e)
C) By using client-side JavaScript
D) By setting the OnClick attribute in the markup
Answer: A) By defining a method with the signature void LinkButton_Click(object sender, EventArgs e)
What is the main purpose of handling the DataBound event in a data-bound control like GridView?
A) To perform operations after data has been bound to the control
B) To initialize control properties
C) To handle control visibility
D) To manage page redirection
Answer: A) To perform operations after data has been bound to the control
How do you bind a control’s event to an event handler in ASP.NET Web Forms markup?
A) By setting the OnEventName attribute to the name of the event handler method
B) By using the EventHandler property
C) By calling the AddEventHandler method
D) By configuring events in the web.config file
Answer: A) By setting the OnEventName attribute to the name of the event handler method
Which method is used to handle events for CheckBoxList control changes?
A) CheckBoxList_SelectedIndexChanged
B) CheckBoxList_ItemChecked
C) CheckBoxList_CheckChanged
D) CheckBoxList_CheckedChanged
Answer: B) CheckBoxList_ItemChecked
How do you handle the event when a user clicks a LinkButton control in a data-bound control?
A) By defining a method with the appropriate signature and associating it with the OnCommand event
B) By using client-side scripts
C) By configuring event handlers in the web.config file
D) By setting properties in the markup
Answer: A) By defining a method with the appropriate signature and associating it with the OnCommand event
Which event is triggered when a user performs an action on a Repeater control item?
A) ItemCommand
B) ItemDataBound
C) ItemCreated
D) ItemChanged
Answer: A) ItemCommand
What is the role of the ItemDataBound event in a Repeater control?
A) To handle operations when data is bound to an item in the Repeater
B) To initialize the control
C) To manage postbacks
D) To set up data binding
Answer: A) To handle operations when data is bound to an item in the Repeater
How do you handle an event for a Button control in ASP.NET Web Forms?
A) By defining a method with the signature void Button_Click(object sender, EventArgs e)
B) By using client-side JavaScript
C) By setting the OnClick property in the markup
D) By using the AddEventHandler method
Answer: A) By defining a method with the signature void Button_Click(object sender, EventArgs e)
Which event occurs when the page is being rendered but before the final HTML is generated?
A) Page_PreRender
B) Page_Load
C) Page_Init
D) Page_Unload
Answer: A) Page_PreRender
How can you handle the CheckedChanged event of a CheckBox control?
A) By defining a method with the signature void CheckBox_CheckedChanged(object sender, EventArgs e)
B) By using client-side scripts
C) By setting the OnCheckedChanged attribute in the markup
D) By configuring events in the web.config file
Answer: A) By defining a method with the signature void CheckBox_CheckedChanged(object sender, EventArgs e)
Which event is raised when a user interacts with a control that does not have a direct event handler defined?
A) Control’s default event
B) Page_Load event
C) Page_Init event
D) Page_PreRender event
Answer: A) Control’s default event
How do you manage state between postbacks for controls that do not support ViewState?
A) By using hidden fields or session state
B) By using cookies only
C) By avoiding server-side processing
D) By setting EnableViewState to false
Answer: A) By using hidden fields or session state
What is the primary function of the Click event for a Button control?
A) To perform actions when the button is clicked by the user
B) To initialize the button control
C) To handle data binding
D) To manage control visibility
Answer: A) To perform actions when the button is clicked by the user
Which event is used to handle changes made to a TextBox control?
A) TextChanged
B) Click
C) Load
D) Change
Answer: A) TextChanged
How do you handle the event when a user selects a different item in a ListBox control?
A) By defining a method with the signature void ListBox1_SelectedIndexChanged(object sender, EventArgs e)
B) By using client-side JavaScript
C) By setting the OnItemSelected attribute in the markup
D) By configuring events in the web.config file
Answer: A) By defining a method with the signature void ListBox1_SelectedIndexChanged(object sender, EventArgs e)
Which event occurs when the DropDownList control is initialized?
A) Page_Init
B) DropDownList_Init
C) DropDownList_Load
D) DropDownList_PreRender
Answer: B) DropDownList_Init
How does the AutoPostBack property affect the event handling of controls?
A) It causes the control to post back to the server when its value changes
B) It disables the control’s event handling
C) It enables client-side scripting
D) It changes the control’s visual appearance
Answer: A) It causes the control to post back to the server when its value changes
What is the effect of setting the EnableViewState property to false on a control?
A) It prevents the control from maintaining its state between postbacks
B) It disables the control’s events
C) It hides the control from view
D) It speeds up the page rendering process
Answer: A) It prevents the control from maintaining its state between postbacks
Which event handler is used to manage data binding in a DataList control?
A) DataList_ItemDataBound
B) DataList_ItemCreated
C) DataList_DataBound
D) DataList_ItemCommand
Answer: C) DataList_DataBound
How do you handle the RowCommand event in a GridView control?
A) By defining a method with the signature void GridView1_RowCommand(object sender, GridViewCommandEventArgs e)
B) By using client-side scripts
C) By configuring event handlers in the web.config file
D) By setting properties in the markup
Answer: A) By defining a method with the signature void GridView1_RowCommand(object sender, GridViewCommandEventArgs e)
Which event occurs after the page’s content has been sent to the client but before the page object is destroyed?
A) Page_Unload
B) Page_PreRender
C) Page_Load
D) Page_Init
Answer: A) Page_Unload
What is the role of the ItemCommand event in a Repeater control?
A) To handle commands raised by controls within Repeater items
B) To manage item data binding
C) To initialize the Repeater control
D) To handle page-level events
Answer: A) To handle commands raised by controls within Repeater items
How do you handle the CheckedChanged event of a RadioButton control?
A) By defining a method with the signature void RadioButton_CheckedChanged(object sender, EventArgs e)
B) By using client-side scripts
C) By setting the OnCheckedChanged attribute in the markup
D) By configuring events in the web.config file
Answer: A) By defining a method with the signature void RadioButton_CheckedChanged(object sender, EventArgs e)
What is the purpose of the ItemCreated event in a Repeater control?
A) To handle the creation of items within the Repeater control
B) To manage data binding
C) To handle item commands
D) To initialize the control
Answer: A) To handle the creation of items within the Repeater control
Which method is used to handle the event when a user clicks a Button control inside a ListView control?
A) ListView_ItemCommand
B) ListView_ButtonClick
C) ListView_ItemClicked
D) ListView_Command
Answer: A) ListView_ItemCommand
How do you ensure that a TextBox control triggers its TextChanged event on every user input?
A) By setting the AutoPostBack property to true
B) By using client-side scripts
C) By configuring event handlers in the web.config file
D) By setting the Text property
Answer: A) By setting the AutoPostBack property to true
What is the role of the RowDataBound event in a GridView control?
A) To handle the binding of data to individual rows
B) To manage page-level events
C) To initialize the control
D) To handle user input
Answer: A) To handle the binding of data to individual rows
How can you handle the RowEditing event in a GridView control?
A) By defining a method with the signature void GridView1_RowEditing(object sender, GridViewEditEventArgs e)
B) By using client-side scripts
C) By setting the OnRowEditing attribute in the markup
D) By configuring events in the web.config file
Answer: A) By defining a method with the signature void GridView1_RowEditing(object sender, GridViewEditEventArgs e)
Which event is triggered when a user selects a new item in a ListBox control?
A) SelectedIndexChanged
B) Click
C) Change
D) TextChanged
Answer: A) SelectedIndexChanged
How do you handle the RowDeleting event in a GridView control?
A) By defining a method with the signature void GridView1_RowDeleting(object sender, GridViewDeleteEventArgs e)
B) By using client-side scripts
C) By setting the OnRowDeleting attribute in the markup
D) By configuring events in the web.config file
Answer: A) By defining a method with the signature void GridView1_RowDeleting(object sender, GridViewDeleteEventArgs e)
What is the purpose of the ItemDataBound event in a DataList control?
A) To handle data binding for individual items
B) To initialize control properties
C) To handle user input
D) To manage postbacks
Answer: A) To handle data binding for individual items
How can you handle the RowCommand event in a DataGrid control?
A) By defining a method with the signature void DataGrid1_RowCommand(object sender, DataGridCommandEventArgs e)
B) By using client-side scripts
C) By setting the OnRowCommand attribute in the markup
D) By configuring events in the web.config file
Answer: A) By defining a method with the signature void DataGrid1_RowCommand(object sender, DataGridCommandEventArgs e)
Which event occurs when the user clicks a control inside a ListView control?
A) ListView_ItemCommand
B) ListView_ItemClicked
C) ListView_Click
D) ListView_Command
Answer: A) ListView_ItemCommand
How do you handle the RowUpdating event in a GridView control?
A) By defining a method with the signature void GridView1_RowUpdating(object sender, GridViewUpdateEventArgs e)
B) By using client-side scripts
C) By setting the OnRowUpdating attribute in the markup
D) By configuring events in the web.config file
Answer: A) By defining a method with the signature void GridView1_RowUpdating(object sender, GridViewUpdateEventArgs e)
What is the purpose of the ItemCommand event in a Repeater control?
A) To handle commands from controls within Repeater items
B) To manage data binding
C) To initialize the control
D) To handle page-level events
Answer: A) To handle commands from controls within Repeater items
How do you handle the DataBound event in a DataList control?
A) By defining a method with the signature void DataList1_DataBound(object sender, EventArgs e)
B) By using client-side scripts
C) By setting the OnDataBound attribute in the markup
D) By configuring events in the web.config file
Answer: A) By defining a method with the signature void DataList1_DataBound(object sender, EventArgs e)
Which event is used to handle a user’s selection in a CheckBoxList control?
A) CheckBoxList_SelectedIndexChanged
B) CheckBoxList_ItemChecked
C) CheckBoxList_CheckedChanged
D) CheckBoxList_CheckChanged
Answer: B) CheckBoxList_ItemChecked
What is the role of the ItemCreated event in a DataList control?
A) To handle the creation of items within the DataList control
B) To manage data binding
C) To handle item commands
D) To initialize the control
Answer: A) To handle the creation of items within the DataList control
How can you handle the RowDataBound event in a GridView control?
A) By defining a method with the signature void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
B) By using client-side scripts
C) By setting the OnRowDataBound attribute in the markup
D) By configuring events in the web.config file
Answer: A) By defining a method with the signature void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
Which event is used to handle the data binding of a DataGrid control?
A) DataGrid_DataBound
B) DataGrid_ItemDataBound
C) DataGrid_ItemCreated
D) DataGrid_RowDataBound
Answer: A) DataGrid_DataBound
How do you handle the RowCommand event in a ListView control?
A) By defining a method with the signature void ListView1_RowCommand(object sender, ListViewCommandEventArgs e)
B) By using client-side scripts
C) By setting the OnRowCommand attribute in the markup
D) By configuring events in the web.config file
Answer: A) By defining a method with the signature void ListView1_RowCommand(object sender, ListViewCommandEventArgs e)
What is the purpose of the ItemCommand event in a ListView control?
A) To handle commands from controls within ListView items
B) To manage data binding
C) To initialize the control
D) To handle page-level events
Answer: A) To handle commands from controls within ListView items