Question 1

The MouseDown event handler header differs from the MouseUp event handler header in that _______.&#10;A) the e references are of different types &#10;B) the sender references are of different types&#10;C) the events handled are different&#10;D) Both a and b.&#10;E) Both a and c.

Accepted Answer

The MouseDown and MouseUp event handlers handle different events, but the sender and e references are of the same types for both events.

Question 2

Mouse-event information is passed to a mouse-event handler via a ____object.&#10;A) MouseEventArgs&#10;B) EventArgs&#10;C) MouseEvent&#10;D) PointerArgs&#10;E) None of the above.

Accepted Answer

Mouse-event information is passed to a mouse-event handler via a MouseEventArgs object, which provides additional information about the mouse event, such as the button pressed, the number of clicks, the wheel movement, and the position of the mouse.

Question 3

The______ property of the Form specifies the Form's background color.&#10;A) Color&#10;B) BackgroundColor&#10;C) BackColor&#10;D) Background&#10;E) DefaultColor

Accepted Answer

The BackColor property is used to specify the background color of a form in various programming environments, including .NET languages like C# and VB.NET.

Question 4

The CreateGraphics method can be called on_______ to initialize the Graphics object.&#10;A) a Graphics object&#10;B) a CreateGraphics object&#10;C) the Form&#10;D) the object on which you wish to draw&#10;E) None of the above.

Accepted Answer

The CreateGraphics method is called on a Form or a Control to initialize a Graphics object for drawing on that specific Form or Control.

Question 5

The rectangle that defines an ellipse is called its_____ .&#10;A) bounding box&#10;B) boundary&#10;C) elliptical rectangle&#10;D) elliptical box&#10;E) ellipse boundary

Accepted Answer

The rectangle that defines an ellipse is called its bounding box. This is because the rectangle bounds or contains the entire ellipse, touching it at its furthest points along the major and minor axes.

Question 6

The MouseButtons enumeration does not contain a ______constant.&#10;A) Right&#10;B) Left&#10;C) Middle&#10;D) Center&#10;E) Both a. and b.

Accepted Answer

The MouseButtons enumeration contains constants for Left, Right, and Middle, but not for Center.

Question 7

When a mouse event is raised on the Form, the ______and______ properties of reference e in a mouse event handler specify the position of the mouse pointer on the Form.&#10;A) XPosition, YPosition&#10;B) XPoint, YPoint&#10;C) X, Y&#10;D) MouseX, MouseY&#10;E) PointerX, PointerY

Accepted Answer

The properties are named X and Y, which specify the horizontal and vertical positions, respectively, of the mouse pointer on the Form when a mouse event occurs.

Question 8

The size of an ellipse drawn using the FillEllipse method is specified in________ .&#10;A) points&#10;B) pixels&#10;C) centimeters&#10;D) dialog units&#10;E) inches

Accepted Answer

The size of an ellipse drawn using the FillEllipse method is specified in pixels, as this is the standard unit of measurement for graphical elements in most programming environments where such a method might be used.

Question 9

If you are only interested in mouse clicks, you should not handle the _______event.&#10;A) MouseUp&#10;B) MouseMove&#10;C) MouseDown&#10;D) MouseEventArgs&#10;E) Both a. and c.

Accepted Answer

MouseMove events are designed to track the movement of the mouse, not clicks. Handling MouseMove when you're only interested in clicks would be unnecessary and could lead to inefficient code.

Deck 21: Cat and Mouse Painter Application