Vocab
A process for reducing the number of bits needed to represent something in which some information is lost or thrown away. This process is not reversible.
Lossy Compression:
A way of representing information using only two options.
Binary:
Tell me this in Deci
10001
17
Which of the following best describes how computing devices represent information?
A. A computer will either represent information as bits or bytes but not both
B. A computer represents data as a byte which is either a 0 or a 1
C. A computer represents data as bits which is either a 0 or a 1
D. A computer represents information as bits which contain 8 bytes.
C. A computer represents data as bits which is either a 0 or a 1
Convert the binary (base-2) number 1001 to decimal (base-10).
A. 9
B. 10
C. 16
D. 17
A. 9
A collection of public copyright licenses that enable the free distribution of an otherwise copyrighted work, used when an author wants to give people the right to share, use, and build upon a work that they have created
Creative Commons:
A contraction of "Binary Digit"; the single unit of information in a computer, typically represented as a 0 or 1
Bit:
00101011
43
When visiting a museum Lian takes a photo of a painting with a smartphone which stores the photo as an image file. Which of the following best describes the differences between the painting itself and the photo of the painting stored on the smartphone?
A. Both the painting and the photo are analog
B. The photo is a digital representation of the analog painting
C. Sampling can be used to determine whether the analog image is an accurate representation of the painting
D. The phone can represent the photo in either digital or analog formats depending on the sampling technique that is used
B. The photo is a digital representation of the analog painting
Which of the following binary (base-2) numbers is LARGEST?
A. 11000000
B. 01111111
C. 00000001
D. 10111111
A
A work or invention that is the result of creativity, such as a piece of writing or a design, to which one has rights and for which one may apply for a patent, copyright, trademark, etc.
Intellectual Property:
Error from attempting to represent a number that is too large.
Overflow Error:
11111111
255
Which of the following is true of how computers represent numbers?
A. Using a fixed but large number of bits can eliminate the possibility of round off error when representing numbers in binary
B. With a fixed number of bits some numbers are too large to represent in a computer which will lead to overflow errors.
C. Using a fixed but large number of bits, for example 128, eliminates the possibility of overflow errors.
D. With a large but fixed number of bits it is possible to eliminate either round-off errors or overflow errors, but not both.
B. With a fixed number of bits some numbers are too large to represent in a computer which will lead to overflow errors.
Which of the following is true of lossy and lossless compression algorithms?
A. Lossy compression algorithms are used when perfect reconstruction of the original data is important.
B. Lossy compression algorithms are typically better than lossless compression algorithms at reducing the number of bits needed to represent a piece of data.
C. Lossless compression algorithms are only used to compress text data.
D. Lossless compression algorithms only allow for an approximate reconstruction of the original data.
B. Lossy compression algorithms are typically better than lossless compression algorithms at reducing the number of bits needed to represent a piece of data.
A process for reducing the number of bits needed to represent something without losing any information. This process is reversible.
Lossless Compression:
Data with values that change continuously, or smoothly, over time. Some examples of data include music, colors of a painting, or position of a sprinter during a race.
Analog Data:
Tell me in Binary
513
1 0 0 0 0 0 0 0 0 1
Which of the following is NOT true of how computers represent complex information?
A. Computing devices use patterns of bits to represent complex information
B. Abstraction helps represent complex information by surfacing complexity that might otherwise be hidden
C. Depending on context the same sequence of bits may represent different types of information
D. Common abstractions that are represented by computing devices include numbers, characters, and color.
B. Abstraction helps represent complex information by surfacing complexity that might otherwise be hidden
How many total numbers can be represented with an 8-bit binary (base-2) system?
A. 127
B. 128
C. 255
D. 256
D
Data that changes discretely through a finite set of possible values
Digital Data:
A process for creating a digital representation of analog data by measuring the analog data at regular intervals called samples.
Sampling:
Tell me:
127
00111111
Your computer uses 4 bits to represent decimal numbers (0, 1, 2, 3 and so on) in binary. What is the SMALLEST number for which an overflow error occur?
A. 14
B. 15
C. 16
D. 17
A. cat bird dog
B. dog cat bird
C. cat dog bird
D. bird cat dog
C. 16
Convert the decimal (base-10) number 20 to binary (base-2).
A. 10010
B. 00101
C. 11000
D. 10100
D