Question 1

Mouse events can be handled for any Control through an object of the class ____.&#10;A) EventArgs&#10;B) MouseEventArgs&#10;C) MousePressEventArgs&#10;D) MousePressArgs

Accepted Answer

Mouse events can be handled using the MouseEventArgs class which provides information about mouse events, such as the mouse position and the button that was clicked.

Question 2

The ____ event occurs when the user clicks the mouse within the Control 's boundaries.&#10;A) MouseClick&#10;B) MouseEnter&#10;C) MouseHover&#10;D) MouseLeave

Accepted Answer

MouseClick is the event that is triggered when the user clicks the mouse within the Control's boundaries. MouseEnter is triggered when the mouse cursor enters the Control's boundaries, MouseHover is triggered when the mouse cursor hovers over the Control's boundaries, and MouseLeave is triggered when the mouse cursor leaves the Control's boundaries. None of these events specifically deal with mouse clicks within the Control's boundaries, making MouseClick the best choice.

Question 3

When you open the ____ file in an IDE, you can examine all the code generated by the Windows Form Designer for an application that creates a Form .&#10;A) Designer.cs&#10;B) EventHandlers.cs&#10;C) Project.cs&#10;D) Form.cs

Accepted Answer

The Designer.cs file contains all the code generated by the Windows Form Designer for an application that creates a Form. This includes the visual layout of the form, as well as any controls or components added to it. The EventHandlers.cs file contains code for handling specific events associated with the controls on the form. The Project.cs file contains information about the overall project, such as its name, properties, and references. The Form.cs file contains the main code for the form itself, including any customizations or functionality added by the developer.

Question 4

Any delegate can encapsulate any method that has the same return type and parameter list as the delegate.

Accepted Answer

This is true. A delegate is like a pointer to a method, and as long as the method signature matches (same return type and parameter list), the delegate can encapsulate the method.

Question 5

When you double-click the Button on the Form in the IDE, you generate the shell of a(n) ____ method.&#10;A) Click&#10;B) Double_Click&#10;C) Enter&#10;D) Focus

Accepted Answer

The double-click event is used to initiate an action when the user double-clicks on a control. In this case, the control is a button on a form, and the event that gets generated when you double-click the button in the IDE is the Click event.

Question 6

In C#, a(n) ____ occurs when something interesting happens to an object.&#10;A) error&#10;B) event&#10;C) note&#10;D) callback

Accepted Answer

Events in C# are used to handle actions or occurrences that take place in a program or application, such as a button being clicked or a file being saved. When an event occurs, it triggers an event handler method to execute a specific set of instructions.

Question 7

A C# delegate is similar to a(n) ____ in C++, a variable that holds a method's memory address.&#10;A) object pointer&#10;B) integer pointer&#10;C) function pointer&#10;D) reference pointer

Accepted Answer

A C# delegate is similar to a function pointer in C++. Both hold the memory address of a method or function.

Question 8

The ____ event occurs when the mouse cursor leaves the Control 's boundaries.&#10;A) MouseClick&#10;B) MouseEnter&#10;C) MouseHover&#10;D) MouseLeave

Accepted Answer

The MouseLeave event occurs when the mouse cursor leaves the control's boundaries, so it is the best choice for this situation. MouseClick, MouseEnter, and MouseHover all occur when the mouse interacts with the control in different ways, so they are not appropriate for this scenario.

Question 9

The C# language requires that every event must use a delegate type with three parameters.

Accepted Answer

C# allows events to use any delegate type that matches the signature required for the event. While most events use a delegate type with two parameters (sender and event arguments), it is not required for every event to have three parameters.

Question 10

An event-handler method is also known as a(n) ____.&#10;A) event source&#10;B) event sender&#10;C) sender object&#10;D) event receiver

Accepted Answer

An event-handler method is responsible for receiving and processing an event, so it is also known as the event receiver. The other options may also be involved in the event system, but they do not refer specifically to the method that handles the event.

Question 11

When an event occurs, any delegate that a client has given or passed to the event is invoked.

Accepted Answer

The answer of When an event occurs, any delegate that...

Question 12

For events that do not use additional information, the .NET Framework has already defined an appropriate delegate type named ____.&#10;A) EventArgs&#10;B) EventTrigger&#10;C) EventPush&#10;D) EventHandler

Accepted Answer

The answer of For events that do not use additional...

Question 13

The code generated in Design mode in the IDE is not meant to be altered by typing. You should modify Control properties through the Properties window in the IDE.

Accepted Answer

The answer of The code generated in Design mode in...

Question 14

The second parameter in a Button event-handler parameter list is a reference to an event argument object of type ____.&#10;A) MouseEventArgs&#10;B) KeyEventArgs&#10;C) EventArgs&#10;D) KeyPressEventArgs

Accepted Answer

The answer of The second parameter in a Button event-handler...

Question 15

You declare a delegate using the keyword ____.&#10;A) handler&#10;B) function&#10;C) pointer&#10;D) delegate

Accepted Answer

The answer of You declare a delegate using the keyword...

Question 16

The ____ class static field named Empty represents an event that contains no event data.&#10;A) delegate&#10;B) EventArgs&#10;C) EventHandler&#10;D) MouseArgs

Accepted Answer

The answer of The ____ class static field named Empty...

Question 17

To declare your own event, you use a ____.&#10;A) handler&#10;B) trigger object&#10;C) delegate&#10;D) raiser

Accepted Answer

The answer of To declare your own event, you use...

Question 18

Programmers say that a button click ____ an event.&#10;A) raises&#10;B) closes&#10;C) deletes&#10;D) revokes

Accepted Answer

The answer of Programmers say that a button click ____...

Question 19

Events must be declared as private .

Accepted Answer

The answer of Events must be declared as private ....

Question 20

A(n) ____ provides a way for the clients of a class to dictate methods that should execute when an event occurs.&#10;A) handler&#10;B) event&#10;C) delegate&#10;D) trigger

Accepted Answer

The answer of A(n) ____ provides a way for the...

Question 21

Keyboard events are also known as ____.&#10;A) key events&#10;B) external events&#10;C) input events&#10;D) console events

Accepted Answer

The answer of Keyboard events are also known as ____.&#10;A)...

Question 22

Given a GUI Control , what objects and delegates are provided to handle mouse events such as clicking, pointing, and dragging?

Accepted Answer

The answer of Given a GUI Control , what objects...

Question 23

A method that performs a task in response to an event is a(n) ____________________.

Accepted Answer

The answer of A method that performs a task in...

Question 24

Events are ____________________ occurrences; that is, they occur during the execution of a program rather than during development or at compile time.

Accepted Answer

The answer of Events are ____________________ occurrences; that is, they...

Question 25

Depending on the event, the delegate used to create the keyboard event handler is either KeyEventHandler or ____.&#10;A) PressEventHandler&#10;B) EventHandler&#10;C) KeyPressHandler&#10;D) KeyPressEventHandler

Accepted Answer

The answer of Depending on the event, the delegate used...

Question 26

The first parameter of an event-handler method is an object named ____________________; it is a reference to the object that generated the event.

Accepted Answer

The answer of The first parameter of an event-handler method...

Question 27

What are the two actions that can be taken on an event field?

Accepted Answer

The answer of What are the two actions that can...

Question 28

What are the default conventions for naming event handlers?

Accepted Answer

The answer of What are the default conventions for naming...

Question 29

When users encounter multiple GUI Control s on a Form , usually one Control has ____; that is, if the user presses the Enter key, the Control will raise an event.&#10;A) contact&#10;B) focus&#10;C) range&#10;D) interaction

Accepted Answer

The answer of When users encounter multiple GUI Control s...

Question 30

Assume you declare three delegates named delegate1 , delegate2 , and delegate3 . You then assign a reference to method M1() to delegate1 , and a reference to method M2() to delegate2 . How do you make delegate3 into a composed delegate that executes both M1() and M2() ? What are the rules concerning return type and parameter list for composed delegates?

Accepted Answer

The answer of Assume you declare three delegates named delegate1...

Question 31

____ occur when a user presses and releases keyboard keys.&#10;A) Mouse events&#10;B) Button events&#10;C) Key events&#10;D) Form events

Accepted Answer

The answer of ____ occur when a user presses and...

Question 32

You can use the + and += operators to combine delegates into a(n) ____________________ that calls the delegates from which it is built.

Accepted Answer

The answer of You can use the + and +=...

Question 33

What are common keyboard events? What is the delegate used to create a keyboard event handler, and what is the type of the second parameter to the event handler?

Accepted Answer

The answer of What are common keyboard events? What is...

Question 34

What is an important difference between KeyEventArgs properties and KeyPressEventArgs properties?

Accepted Answer

The answer of What is an important difference between KeyEventArgs...

Question 35

Given the delegate declaration: &#160; delegate void GreetingDelegate(string s); &#10;What do you know about any method that is represented by this delegate? In general, what can you tell about a method if you know it is encapsulated by a particular delegate?

Accepted Answer

The answer of Given the delegate declaration: &#160; delegate void...

Question 36

Connecting an event to its resulting actions is called event ____________________.

Accepted Answer

The answer of Connecting an event to its resulting actions...

Question 37

____ is a Boolean property of a Control that identifies whether the Control will serve as a stopping place in a sequence of Tab key presses.&#10;A) TabIndex&#10;B) TabCount&#10;C) TabStop&#10;D) TabFlag

Accepted Answer

The answer of ____ is a Boolean property of a...

Question 38

When you define your own event-handler delegate, what arguments are required? Provide an example of a delegate declaration.

Accepted Answer

The answer of When you define your own event-handler delegate,...

Question 39

When a Form contains multiple Control s, you can create a separate event handler for each Control . However, you can also associate the same event handler with multiple Control s. Describe how to associate an existing event handler with a second Control using the IDE.

Accepted Answer

The answer of When a Form contains multiple Control s,...

Question 40

The ____ event occurs when a mouse button is released while the mouse is within the Control 's boundaries.&#10;A) MouseClick&#10;B) MouseHover&#10;C) MouseUp&#10;D) MouseMove

Accepted Answer

The answer of The ____ event occurs when a mouse...

Question 41

Match between columns&#10;                        Premises: Used to notify an object's client of a change that has occurred in the object&#10;Used to notify an object's client of a change that has occurred in the object&#10;Used to notify an object's client of a change that has occurred in the object&#10;Used to notify an object's client of a change that has occurred in the object&#10;Used to notify an object's client of a change that has occurred in the object&#10;Used to notify an object's client of a change that has occurred in the object&#10;Used to notify an object's client of a change that has occurred in the object&#10;Used to notify an object's client of a change that has occurred in the object&#10;Used to notify an object's client of a change that has occurred in the object&#10;A type of delegate that lets you invoke multiple method calls using a single statement&#10;A type of delegate that lets you invoke multiple method calls using a single statement&#10;A type of delegate that lets you invoke multiple method calls using a single statement&#10;A type of delegate that lets you invoke multiple method calls using a single statement&#10;A type of delegate that lets you invoke multiple method calls using a single statement&#10;A type of delegate that lets you invoke multiple method calls using a single statement&#10;A type of delegate that lets you invoke multiple method calls using a single statement&#10;A type of delegate that lets you invoke multiple method calls using a single statement&#10;A type of delegate that lets you invoke multiple method calls using a single statement&#10;A delegate used to create mouse event handlers&#10;A delegate used to create mouse event handlers&#10;A delegate used to create mouse event handlers&#10;A delegate used to create mouse event handlers&#10;A delegate used to create mouse event handlers&#10;A delegate used to create mouse event handlers&#10;A delegate used to create mouse event handlers&#10;A delegate used to create mouse event handlers&#10;A delegate used to create mouse event handlers&#10;The control that generates an event&#10;The control that generates an event&#10;The control that generates an event&#10;The control that generates an event&#10;The control that generates an event&#10;The control that generates an event&#10;The control that generates an event&#10;The control that generates an event&#10;The control that generates an event&#10;The technique of packaging an object's attributes and methods into a cohesive unit that can then be used as an undivided entity&#10;The technique of packaging an object's attributes and methods into a cohesive unit that can then be used as an undivided entity&#10;The technique of packaging an object's attributes and methods into a cohesive unit that can then be used as an undivided entity&#10;The technique of packaging an object's attributes and methods into a cohesive unit that can then be used as an undivided entity&#10;The technique of packaging an object's attributes and methods into a cohesive unit that can then be used as an undivided entity&#10;The technique of packaging an object's attributes and methods into a cohesive unit that can then be used as an undivided entity&#10;The technique of packaging an object's attributes and methods into a cohesive unit that can then be used as an undivided entity&#10;The technique of packaging an object's attributes and methods into a cohesive unit that can then be used as an undivided entity&#10;The technique of packaging an object's attributes and methods into a cohesive unit that can then be used as an undivided entity&#10;Shown in the Properties window of the IDE, and looks like a lightning bolt&#10;Shown in the Properties window of the IDE, and looks like a lightning bolt&#10;Shown in the Properties window of the IDE, and looks like a lightning bolt&#10;Shown in the Properties window of the IDE, and looks like a lightning bolt&#10;Shown in the Properties window of the IDE, and looks like a lightning bolt&#10;Shown in the Properties window of the IDE, and looks like a lightning bolt&#10;Shown in the Properties window of the IDE, and looks like a lightning bolt&#10;Shown in the Properties window of the IDE, and looks like a lightning bolt&#10;Shown in the Properties window of the IDE, and looks like a lightning bolt&#10;Generated when a Button object is clicked&#10;Generated when a Button object is clicked&#10;Generated when a Button object is clicked&#10;Generated when a Button object is clicked&#10;Generated when a Button object is clicked&#10;Generated when a Button object is clicked&#10;Generated when a Button object is clicked&#10;Generated when a Button object is clicked&#10;Generated when a Button object is clicked&#10;Also known as an event-handler method&#10;Also known as an event-handler method&#10;Also known as an event-handler method&#10;Also known as an event-handler method&#10;Also known as an event-handler method&#10;Also known as an event-handler method&#10;Also known as an event-handler method&#10;Also known as an event-handler method&#10;Also known as an event-handler method&#10;Represents an event that contains no event data&#10;Represents an event that contains no event data&#10;Represents an event that contains no event data&#10;Represents an event that contains no event data&#10;Represents an event that contains no event data&#10;Represents an event that contains no event data&#10;Represents an event that contains no event data&#10;Represents an event that contains no event data&#10;Represents an event that contains no event data

Accepted Answer

The Answer of MouseEventHandler and event receiver and Click event is...

Deck 13: Handling Events