Deck 3: Data Representation

Question 1

In which text compression technique is it invalid for a bit string that represents a character to be the prefix of any other string used to represent a character?

A) Run-length encoding
B) Character set encoding
C) Keyword encoding
D) Huffman encoding
E) ASCII encoding

Answer 1

D

Question 2

Which technique for representing numeric data uses the mantissa to hold the significant digits of a value?

A) Signed-magnitude
B) Fixed-sized numbers
C) Floating point
D) Ten's complement
E) Scientific notation

Answer 2

C

Question 3

Information is data that has been organized and/or processed in a useful way.

Answer 3

True

Question 4

Electronic signals are easier to manage if they transfer only binary data.

Question 5

Every additional bit used doubles the number of things that can be represented by a binary string.

Question 6

A character set is a list of characters and their numeric codes.

Question 7

The ASCII character set is an international set that represents most of the world's languages.

Question 8

Run-length encoding replaces common words with shorter symbols.

Question 9

Networks have _______________ restrictions that limit the number of bytes that can be transmitted from one place to another in a fixed amount of time.

Question 10

The decimal point in a number, when working in other bases, is called the _______________ point.

Question 11

The _______________ character set is an attempt to represent characters and symbols for all languages in the world.

Question 12

The most popular audio format used today is the _______________ format.

Question 13

A(n) _______________ stores image information on a pixel-by-pixel basis.

Question 14

_______________ compression of video uses delta frames to represent changes from one frame to the next.

Question 15

How is an analog audio signal digitized?

Question 16

What is color?

Question 17

Describe the photoreceptor cone cells in the eyes of a human being.

Question 18

What is data compression?

Question 19

Describe an analog audio signal.

Question 20

What color does an RGB value of (0, 0, 0) represent?

Question 21

How many things can be represented using three bits?

A) 3
B) 4
C) 6
D) 8
E) 12

Question 22

How many things can be represented using two bits?

A) 2
B) 4
C) 6
D) 8
E) 10

Question 23

Which of the following is a list of characters and the codes used to represent each one?

A) Binary string
B) Character set
C) Scientific notation
D) Video codec
E) Binary value

Question 24

Which of the following characters are not represented in the ASCII character set?

A) Uppercase letters (A-Z)
B) Lowercase letters (a-z)
C) Punctuation such as a period or comma
D) Cyrillic characters
E) Nonprintable characters such as ESC (escape) and DEL (delete)

Question 25

Recording the voltage level of an audio signal at regular intervals is called what?

A) Sampling
B) Peak analysis
C) Pulse-code modulation
D) MP3 analysis
E) CD simulation

Question 26

Which of the following is not a raster-graphics format?

A) BMP
B) GIF
C) JPEG
D) PNG
E) Flash

Question 27

Which of the following is data about data, such as the resolution of an image being stored with the image?

A) Scientific notation
B) Keyword encoding
C) Metadata
D) Digital data
E) Analog data

Question 28

Bandwidth is the term that describes the size of the wires connecting two computers in a network.

Question 29

It is possible to represent four things with two bits.

Question 30

Information is data that have been organized and/or processed in a useful way.

Question 31

In lossy data compression, the data can be retrieved without any loss of information.

Question 32

In a signed-magnitude representation of numbers, there are two representations of zero.

Question 33

Negative numbers cannot be represented using the fixed-sized number representation technique.

Question 34

Huffman encoding uses variable length binary strings to represent particular characters.

Question 35

Audio data is often represented on a computer by sampling the continuous signal that represents a sound wave.

Question 36

Thicker monitors produce more vibrant colors because they have a higher color depth.

Question 37

What does pulse-code modulation (PCM) describe?

A) The behavior of a continuous analog signal
B) The behavior of a digital signal, which jumps between two extremes
C) The behavior of a compressed signal
D) The loss of data as a signal degrades
E) The loss of data due to compression

Question 38

What is the minimum number of bits needed to represent 6 things?

A) 2
B) 3
C) 4
D) 6
E) 8

Question 39

Which problem is caused most directly by the existence of two representations of zero within a computer?

A) Incorrect results
B) Increased cost
C) Slower calculations
D) Unnecessary complexity
E) Wasted memory

Question 40

Which of the following best describes the number of characters that can be represented in the Unicode character set?

A) 256
B) 1024
C) Over 10,000
D) Over 65,000
E) Over 100,000

Question 41

Which audio format is the most popular today?

A) WAV
B) AU
C) AIFF
D) VQF
E) MP3

Question 42

Bandwidth is the number of bits or bytes that can be transmitted from one place to another in a fixed amount of time.

Question 43

The term radix point is used instead of decimal point in bases other than 10.

Question 44

Keyword encoding is a type of text compression.

Question 45

A RGB value is made up of three values that represent the relative contributions of the primary colors red, green, and blue.

Question 46

The JPEG image format is best used for line art, while the GIF format is superior for photographic images.

Question 47

Data _______________ is the process of reducing the amount of space needed to store a piece of data.

Question 48

When representing numbers using _______________, there are two representations for zero.

Question 49

The acronym ASCII stands for _______________.

Question 50

_______________ uses a variable-length binary string to represent a character so that frequently used characters have short codes.

Question 51

_______________ is the process of periodically measuring the voltage of a signal.