1 It’s the use of 1s and 0s to represent all data and information on a computer.
Binary representation of data
2 It’s a base 8 number system.
Octal
3 It’s a base 16 number system that’s used by programmers.
Hexadecimal
4ASCII stands for...
American Standard Code for Information Exchange
5How many bits are used per character in ASCII?
8 bits
6 It’s used to translate input into digital outputs and has 2^8 or 256 unique arrangements but lacks the ability to represent symbols or letters from different languages.
ASCII
7Unlike ASCII, it uses 16 bits per character, meaning that it has 2^16 or 65536 unique arrangements that include what’s represented by ASCII along with symbols or letters for different languages.
UNICODE
8How many bits are used per character in UNICODE?
16 bits
9 It’s a type of file compression in which some data is lost.
Lossy
10It’s a type of file compression in which all data is kept.
Lossless
11 It’s details that’s organized and analyzed for a future task.
Data
12It’s information that’s collected from a set of data.
Metadata
13RGB stands for...
Red Green Blue
14is used to represent the different ranges and combinations of colors on a monitor.
RGB
15 It’s the process in which data is taken and reformatted in a way that isn’t easily decipherable.
Encryption
16Convert the decimal number 76 to binary.
1001100
17Convert the binary number 101101 to decimal (base10).
45
18Convert the decimal number 76 to hexadecimal.
4C
19Convert the hexadecimal number A3 to its decimal representation.
163
20How does the computer distinguish between a photo and a text file if everything is stored as bits?
They distinguish them through file extension types.
21 Which (lossy or lossless) would be most appropriate for each of the following and why? An image saved to be studied by brain surgeons while performing delicate surgery.
lossy
22Which (lossy or lossless) would be most appropriate for each of the following and why? An image uploaded to use on a personal webpage.
lossy
23Which (lossy or lossless) would be most appropriate for each of the following and why? A sound file used as background music for a home video where the song and video are to be uploaded to YouTube.
lossy
24Which (lossy or lossless) would be most appropriate for each of the following and why? A .zip file used to store a directory of documents.
lossless
25Which (lossy or lossless) would be most appropriate for each of the following and why? An image used as a thumbnail on your computer.
lossy
26Classify each of the following file types as lossy compression, lossless compression, or not compressed: JPG
lossy
27Classify each of the following file types as lossy compression, lossless compression, or not compressed: GIF
lossless
28Classify each of the following file types as lossy compression, lossless compression, or not compressed: BMP
lossless
29Classify each of the following file types as lossy compression, lossless compression, or not compressed: TIFF
lossless
30Classify each of the following file types as lossy compression, lossless compression, or not compressed: MP3
lossy
31Classify each of the following file types as lossy compression, lossless compression, or not compressed: WAV
lossless
32Classify each of the following file types as lossy compression, lossless compression, or not compressed: PNG
lossless
33Classify each of the following file types as lossy compression, lossless compression, or not compressed: PSD
neither
34An RGB color represented by the triplet (220, 65, 43) is closest in color to which of the components, RED, GREEN, or BLUE. Explain your answer.
Red because it’s the first and highest value in the list
35Briefly explain how Caesar’s Cipher works (BTB).
You would swap out the letters for the fourth corresponding letter in the alphabet.
36Caesar's Swap Example
D & A
37How does Frequency Analysis work trying to decrypt a document (BTB)?
It’s a method created by Al-Kindi which deciphers code based on how often a letter would appear in a piece of text.