Question 1

Why is the conversion of an image to grayscale by simply computing the average of a pixel less than ideal?

Accepted Answer

A)   The conversion will still contain non-grayscale colors.
B)   The conversion does not take luminance into account.
C)   The conversion will cause some areas of the image to be invisible
D)   The conversion will make details that are red or green in color hard to see.E) B) and C)
F) A) and D)

Question 2

The screen coordinate system for the display of an image is somewhat different from the standard Cartesian coordinate system used with Turtle graphics.

Accepted Answer

A) True 
 B)False

Question 3

What RGB value should you use to produce a blue color?

Accepted Answer

A)   0, 0, 0
B)   0, 255, 0
C)   255, 255, 0
D)   0, 0, 255E) B) and D)
F) A) and C)

Question 4

Given a Turtle object of t, what method can you use to erase all of the turtle's drawings, without changing the state?

Accepted Answer

A)   t.delete() 
B)   t.clear() 
C)   t.erase() 
D)   t.scratch() E) B) and C)
F) C) and D)

Question 5

What is instantiation in Python?

Accepted Answer

A)   It is the process of creating an IDLE session that utilizes a graphics window.
B)   It is the process of calling a module mutator method.
C)   It is the process of calling a function that returns no object.
D)   It is the process of creating a class-based object.E) All of the above
F) A) and B)

Question 6

In turtle graphics, the turtle is initially facing east.

Accepted Answer

A) True 
 B)False

Question 7

Which of the following image formats is considered to be the most popular? (Choose two.)

Accepted Answer

A)   XCF
B)   GIF
C)   JPEG
D)   SVGE) C) and D)
F) A) and B)

Question 8

A fractal object can be described using Euclidean geometry.

Accepted Answer

A) True 
 B)False

Question 9

Constructors are used to create new instances of a class.

Accepted Answer

A) True 
 B)False

Question 10

A raw image file saves all of the sampled information.

Accepted Answer

A) True 
 B)False

Question 11

What does the term "sampling" imply in relation to images?

Accepted Answer

A)   The mapping of analog information in a visual format to discrete values.
B)   The conversion of digital into analog information for display on a screen.
C)   The process of creating analog information from digital information, for use in computer programs.
D)   The utilization of a sample of data to represent a larger digital data set.E) C) and D)
F) A) and C)

Question 12

In the RGB system, each color component can range from 0 through 127.

Accepted Answer

A) True 
 B)False

Question 13

What type of method returns the values of an object's attributes without altering its state?

Accepted Answer

A)   mutator methods
B)   controller methods
C)   accessor methods
D)   positional methodsE) C) and D)
F) A) and D)

Question 14

Assuming you have an images module object named i, what method can you use to change the pixel at coordinate 238, 590 to red?

Accepted Answer

A)   i.setPixel(238, 590, (255, 0, 0) ) 
B)   i.chgPixel(590, 238, (0, 255, 0) ) 
C)   i.modPixel(238, 590, (255, 0, 0) ) 
D)   i.Pixel(238, 590, (0, 0, 255) ) E) C) and D)
F) All of the above

Question 15

Which of the following classes are associated with a Turtle object? (Choose two.)

Accepted Answer

A)   Screen
B)   Canvas
C)   Plot
D)   PageE) A) and B)
F) C) and D)

Question 16

RGB stands for red, green, and black.

Accepted Answer

A) True 
 B)False

Question 17

The size of a pixel is determined by the size and resolution of the display.

Accepted Answer

A) True 
 B)False

Question 18

A fractal curve is one-dimensional.

Accepted Answer

A) True 
 B)False

Question 19

What type of image compression analyzes larger regions of pixels and saves a color value that the pixels' colors approximate?

Accepted Answer

A)   lossless compression
B)   lossy compression
C)   summary compression
D)   recursive compressionE) B) and D)
F) C) and D)

Question 20

Generally, an object's state is the set of values of its attributes at any given point in time.

Accepted Answer

A) True 
 B)False

Exam 7: Simple Graphics and Image Processing

In the RGB system, each color component can range from 0 through 127.

Correct AnswerverifiedShow Answer

Why is the conversion of an image to grayscale by simply computing the average of a pixel less than ideal?

Correct AnswerverifiedShow Answer

What type of image compression analyzes larger regions of pixels and saves a color value that the pixels' colors approximate?

Correct AnswerverifiedShow Answer

What is instantiation in Python?

Correct AnswerverifiedShow Answer

Which of the following classes are associated with a Turtle object? (Choose two.)

Correct AnswerverifiedShow Answer

The size of a pixel is determined by the size and resolution of the display.

Correct AnswerverifiedShow Answer

The screen coordinate system for the display of an image is somewhat different from the standard Cartesian coordinate system used with Turtle graphics.

Correct AnswerverifiedShow Answer

What type of method returns the values of an object's attributes without altering its state?

Correct AnswerverifiedShow Answer

What does the term "sampling" imply in relation to images?

Correct AnswerverifiedShow Answer

In turtle graphics, the turtle is initially facing east.

Correct AnswerverifiedShow Answer

Constructors are used to create new instances of a class.

Correct AnswerverifiedShow Answer

Which of the following image formats is considered to be the most popular? (Choose two.)

Correct AnswerverifiedShow Answer

RGB stands for red, green, and black.

Correct AnswerverifiedShow Answer

A raw image file saves all of the sampled information.

Correct AnswerverifiedShow Answer

A fractal object can be described using Euclidean geometry.

Correct AnswerverifiedShow Answer

A fractal curve is one-dimensional.

Correct AnswerverifiedShow Answer

What RGB value should you use to produce a blue color?

Correct AnswerverifiedShow Answer

Assuming you have an images module object named i, what method can you use to change the pixel at coordinate 238, 590 to red?

Correct AnswerverifiedShow Answer

Given a Turtle object of t, what method can you use to erase all of the turtle's drawings, without changing the state?

Correct AnswerverifiedShow Answer

Generally, an object's state is the set of values of its attributes at any given point in time.

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified