Deck 15: Graphics and Multimedia

Question 1

The Graphics class does not include a method for drawing

A)lines
B)shapes
C)images
D)strings
E)None of the above

Answer 1

E

Question 2

The System.Drawing namespace provides rectangle and point structures that can be used when drawing on a 2D plane.

Answer 2

True

Question 3

Visual Basic includes tools

A)for drawing 2-D shapes
B)for controlling colors and fonts
C)to support graphics that enable programmers to enhance their Windows apps visually
D)All of the above

Answer 3

D

Question 4

You cannot create your own Paint event handler,rather you must rely on the default implementation provided.

Question 5

OnPaint is a method that cannot be overridden.

Question 6

You can call the Invalidate method to redraw the graphics in a window.

Question 7

Graphics method Invalidate __________.

A)checks to see if a form is valid
B)invalidates a form
C)clears a form
D)refreshes and updates a form

Question 8

Screen coordinates are measured in:

A)inches
B)centimeters
C)pixels
D)millimeters

Question 9

Visual Basic also includes namespaces for multimedia such as the Windows Media Player control.

Question 10

You never call method OnPaint directly because

A)OnPaint is an abstract method.
B)drawing graphics is an event-driven process.
C)OnPaint is a GUI method only so it cannot be called.
D)OnPaint is a class not a method.

Question 11

You'll explicitly call the OnPaint method often.

Question 12

In Visual Basic's coordinates system (0,0)is located on the bottom-left of the plane.

Question 13

Every app that derives from class System.Windows.Forms.Form inherits an Overridable method named ________ where most graphics operations are performed.

A)OnPaint
B)Paint
C)Draw
D)None of the above.

Question 14

The Graphics class has methods for:

A)creating pictures
B)drawing lines and shapes
C)drawing only lines
D)creating images

Question 15

Instead of overriding the OnPaint method,you can add an event handler for the Paint event.

Question 16

To draw on a control using one of the Graphics drawing methods,you must pass a pen or brush object as the first argument to the method.

Question 17

What is the GDI+?

A)A specific type of program
B)An app programming interface that provides classes for graphical purposes
C)An acronym for Graphical Depiction Implementation Plus
D)All of the above

Question 18

Visual Basic includes many drawing methods that are inside the System.Drawing and System.Drawing.Drawing2D namespaces.

Question 19

Graphics objects contain methods for drawing,font manipulation,color
manipulation,and other graphics-related actions.

Question 20

Namespaces like System.Drawing and System.Drawing.Drawing2D help make up:

A)GDI
B)GDI %
C)GDI+
D)GDI#

Question 21

There are Font properties that specify font characteristics such as cell ascent and cell descent.

Question 22

A font's properties are also known as its metrics.

Question 23

The properties of font objects cannot be changed once created.

Question 24

Class ColorDialog allows the programmer to display a text box of the chosen color.

Question 25

What does the A in ARGB stand for and what does it determine?

A)Atomic,the percentage of distribution of each color
B)Apeck,the ordering of colors
C)Alpha,the opacity of the color
D)None of the above

Question 26

Which of the following RGBcolor codes will result in White?

A)0,0,0
B)255,255,255
C)255,0,0
D)None of the above.

Question 27

In general a pen object is used to:

A)fill an entire shape with a color
B)fill an entire shape with a pattern
C)draw an outline of an shape in black or blue
D)draw an outline of a shape

Question 28

The graphics enumeration called GraphicsUnit has constant font sizes.

Question 29

The Size property of a Font object returns the size measured in ________ by default.

A)pixel
B)points
C)design units
D)None of the above.

Question 30

A property like Bold or Underline:

A)returns false if the font is bold or underlined,respectively.
B)returns true if the font is bold or underlined,respectively.
C)makes the text all bold or underlined,respectively.
D)gets rid of all bold or underlined text,respectively,and makes it plain.

Question 31

A syntax error will occur if a specified font is not available on a system.

Question 32

An existing Font object can be modified to have different properties.

Question 33

The most common unit of measurement for fonts,the point,is equivalent to1/72 inch.

Question 34

Computers view colors as having the following color components:

A)red,blue and yellow.
B)purple,orange and green.
C)red,yellow and green.
D)red,green and blue.

Question 35

Only the colors in the Color structure may be used in a program.

Question 36

Color is implemented as a class,rather than as a structure.

Question 37

A LinearGradientBrush draws a solid object whose color blends from one color to another.

Question 38

The alpha value determines the brightness of the color.

Question 39

The ascent of a character is:

A)the height of the character
B)how high above the base line a character goes
C)the vertical space between characters
D)extra spacing above the character for accents.

Question 40

The Size property of class Font returns the size of a font in its point size.

Question 41

Counter clockwise arcs are negative.

Question 42

To draw a polygon,you pass to the method:

A)a brush or pen
B)an array of points
C)a brush or pen,and an array of points
D)a grid with a list of points drawn on it

Question 43

Arguments to the method for drawing an arc are the same as for the method to draw an ellipse.

Question 44

An arc is a portion of an ellipse.

Question 45

To close the polygon,the user needs to enter the first point twice,once at the beginning and once at the end.

Question 46

For a polygon to be drawn correctly,the first pair of coordinates in the series of
Points passed to the DrawPolygon method must be the same as the last pair of coordinates.

Question 47

The DrawRectangle method uses a Brush object.

Question 48

The number of degrees that an arc traverses from its starting angle is known as the _____________.

A)traversed angle
B)size
C)arc angle
D)None of the above.

Question 49

The four integers that are passed to a Graphics method DrawRectangle represent the top-left and bottom-right corners of the rectangle.

Question 50

The DrawPie method of class Graphics will create:

A)a picture of a pie
B)an arc with lines connecting to the center of the arc's ellipse
C)an arc that is filled in with color or patterns
D)there is no DrawPie method

Question 51

To make a filled rectangle use the syntax:

A)FillRectangle(Pen p,Integer x,Integer y,Integer width, Integer height)
B)DrawRectangle(Pen p,Integer x,Integer y,Integer width, Integer height)
C)FillRectangle(Brush b,Integer x,Integer y,Integer width,Integer height)
D)DrawRectangle(Brush b,Integer x,Integer y,Integer width,Integer height)

Question 52

Arcs are described most specifically as _______________.

A)angles
B)portions of ellipses
C)half circles
D)None of the above

Question 53

The difference between an open and closed polygon is:

A)the use OpenPolygon method.
B)the use of the ClosedPolygon method.
C)whether the last point is the same as the first.
D)the use of the AutoPolygon method.

Question 54

An arc is drawn as part of an ellipse whose location is specified by the bounding rectangle of the ellipse.

Question 55

Polygons are described most specifically as:

A)odd-sided shapes
B)multi-sided shapes
C)six-sided shapes
D)None of the above.

Question 56

To form a circle,the syntax of an arc must be:

A)DrawArc( p,1,1,1,1,0,Math.PI )
B)DrawArc( p,1,1,1,1,360,0 )
C)DrawArc( p,1,1,1,1,0,360 )
D)DrawArc( p,1,1,1,1,360,Math.PI )
E)None of the above

Question 57

A Brush object can be used only to fill a shape with a color.

Question 58

If you fill an open polygon an error occurs.

Question 59

The order of a polygon's points does not matter.

Question 60

The drawing objects provided to methods that draw shapes,such as Pen or Brush,determine characteristics such as the color and style of the specific shape.

Question 61

To load an image that is on disk,use

A)instance method FromImage of class Image
B)instance method GetImage of class Image
C)static method Image.FromImage
D)static method Image.GetImage

Question 62

A ___________displays a dialog in which the user can view the document that will print before it's sent to the printer.

A)PrintPreviewDialog
B)PreviewDialog
C)PrintViewDialog
D)DisplayDialog

Question 63

LinearGradientMode.ForwardDiagonal creates a gradient from the upper-right to the lower-left corner.

Question 64

Method FillPolygon fills a polygon that has already been drawn.

Question 65

Image's method CreateGraphics is available only to picture-related controls.

Question 66

The default event for a PrintDocument is the PrintPage event,which occurs when the data required to print the current page is needed-that is,when the document is printed or a print preview is generated.

Question 67

GraphicsPath method AppendLine appends a line to the shape.

Question 68

When using the DrawImage method of the class Image,the x and y coordinates are the __________ arguments,and represent the _________ corner of the image.

A)first and second,top-right
B)second and third,top-left
C)third and fourth,bottom-right
D)fourth and sixth,bottom-left

Question 69

To insert a program into a new program,you must:

A)import that program with the Imports keyword
B)use the desired program as a control and use it in the form
C)implement the desired program
D)extend the desired program

Question 70

Graphics method RotateTransform enables you to rotate drawing positions around the __________.

A)upper-left corner
B)center
C)origin
D)lower-right corner

Question 71

In order to create a new picture on a Form,one makes a new Image object.

Question 72

A Graphics object must be created on the Form in order to display an Image on that Form.

Question 73

The __________ represent(s)the printable area of a page.

A)PrintBounds
B)Boundary
C)MarginBounds
D)Perimeter

Question 74

A TextureBrush is a brush that fills the interior of a shape with an image rather than a solid color.

Question 75

Objects of type _________ hold the URL property of the file chosen by the user for the Windows Media Player.

A)URL
B)Link
C)AxMediaPlayer
D)Location

Question 76

You can provide width and height values to resize an Image.