Deck 5: Using Classes and Objects in Media Computing

Question 1

An image with a file size of 120 kilobytes and an image size of 300 by 225 pixels is a large file.

Answer 1

False

Question 2

____ give programmers access to complex behavior.

A) Objects
B) Aspects
C) Samples
D) Mutators

Answer 2

A

Question 3

A pixel contains integer values that represent its color in terms of ____ components.

A) PPI
B) aspect
C) height and width
D) RGB

Answer 3

D

Question 4

When an image is loaded by a Web browser, the software maps the bits from the image file into a rectangular area of colored dots for display.

Question 5

In a pixel grid, the x-coordinates increase positively towards the bottom. ____________________

Question 6

Use the saveAs method to overwrite an image file with the changes made in the program. ____________________

Question 7

A mutator is a method that is used to modify the internal contents of an object. ____________________

Question 8

Loops that march across a row before moving onto the next row use a row-major traversal pattern.

Question 9

An image basically consists of all of the following EXCEPT ____.

A) width
B) height
C) depth
D) set of pixels

Question 10

In a pixel grid, the position (0, 0) is in the ____ corner of the grid.

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

Question 11

When the resolution of a monitor is increased, the images appear larger.

Question 12

To convert an image to grayscale, the average of a pixel's color values is calculated, and each value is reset to the average.

Question 13

To create a copy of an image, it is easiest to start by treating a new, blank image with the same height and width as the original.

Question 14

The aspect ratio of a pixel is used to detect an edge.

Question 15

In a pixel grid, the position (width-1, height-1) is in the ____ corner of the grid.

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

Question 16

For the color white, the RGB values are all 255. ____________________

Question 17

In a pixel grid, the y-coordinates increase positively towards the top.

Question 18

A sample size of 16 bits allows signed integers from 0 to 1.

Question 19

Each pixel is accessible by means of its (x, y) coordinates.

Question 20

Use the method setColor to replace an RGB value at a given position in an image. ____________________

Question 21

A(n) ____ loop structure visits each element in a sequence or counts through a sequence of numbers using a single loop control variable.

A) nested
B) linear
C) single
D) straight

Question 22

The ____ method builds and return a new image with the same attributes as the original one, but with an empty string as the filename.

A) copy
B) duplicate
C) clone
D) repeat

Question 23

A constructor without parameters is known as a(n) ____ constructor.

A) default
B) uninstantiated
C) mutated
D) object

Question 24

One way of rearranging sound clips, called ____, is to place one clip after another to form a new sound.

A) splicing
B) dubbing
C) composing
D) echoing

Question 25

The sounds package includes the ability to ____.

A) record new sound clips
B) open files containing existing clips
C) play the currently loaded clip
D) all of the above

Question 26

An enhanced for loop is also called a(n) ____ loop.

A) for-for
B) for-each
C) then-for
D) if-for

Question 27

FIGURE 5-1
The image to the right in Figure 5-1 above has ____.

A) been converted to black and white
B) had its brightness adjusted
C) had its edges detected
D) been converted to grayscale

Question 28

Nico wants to add a(n) ____, an effect wherein an earlier part of a sound clip is heard concurrently with the sound at the present moment.

A) splice
B) echo
C) compose
D) blur

Question 29

Object ____ makes a new object available to a program.

A) orientation
B) definition
C) instantiation
D) access

Question 30

A program instantiates a class by using one of its ____ with the new operator.

A) variables
B) constructors
C) accessors
D) mutators

Question 31

Image-manipulation packages allow you to transfer images from file to working storage in ____________________.

Question 32

A(n) ____ is a method that returns a value and is used to examine part of the contents of an object.

A) mutator
B) evaluator
C) instantiator
D) accessor

Question 33

The inputs to an echo algorithm are a sound clip and an integer ____.

A) coordinate
B) value
C) variable
D) delay

Question 34

If the factor Emma uses in her algorithm is ____, the product of the sample and the factor might exceed the limit of the legitimate sample range.

A) greater than 32767
B) less than -32768
C) greater than 1
D) less than 1

Question 35

To use an object effectively, the programmer must know the set of ____ that it recognizes.

A) classes
B) methods
C) parameters
D) packages

Question 36

FIGURE 5-2
____ detection was used in Figure 5-2 above to remove the full colors of the original image to uncover the outlines of the objects represented in the image.

A) Line
B) Edge
C) Luminance
D) Color

Question 37

The area of RAM reserved for Java objects is called the ____ space.

A) heap
B) free
C) storage
D) save

Question 38

A(n) ____________________ is a colored dot that is used as a part of an image file display.

Question 39

____________________-based programming is the discipline of using existing classes, objects, and methods to solve problems.

Question 40

A sound with higher ____ results in a higher fidelity to the original sound as well in a large file size.

A) frequency
B) volume
C) density
D) sampling rate

Question 41

Identify the letter of the choice that best matches the phrase or definition.
a.API
b.PPI
c.Xmx
d.Luminance
e.Amplitude
The average of a pixel's RGB values.

Question 42

The set of an object's methods available to users is called its ____________________.

Question 43

Identify the letter of the choice that best matches the phrase or definition.
a.API
b.PPI
c.Xmx
d.Luminance
e.Amplitude
Used to adjust the heap space used for data memory.

Question 44

Identify the letter of the choice that best matches the phrase or definition.
a.API
b.PPI
c.Xmx
d.Luminance
e.Amplitude
A sound's volume at a given moment.

Question 45

The RGB value (0, 0, 0) represents the color ____________________.

Question 46

Identify the letter of the choice that best matches the phrase or definition.
a.API
b.PPI
c.Xmx
d.Luminance
e.Amplitude
The set of interfaces in a package or an entire language.

Question 47

Identify the letter of the choice that best matches the phrase or definition.
a.API
b.PPI
c.Xmx
d.Luminance
e.Amplitude
Used to measure monitor resolution.