Flashcards
2. Data Representation
Flashcards do conjunto (29)
- 1Form of storing data'o's and '1'. The reason of storing this way is because computers use for storage can very easily represent data in one of two states. ("Yes" and "no")
- 2BitSingle binary digit
'1' or '0' - 3Nybble4 bits
whole number between 0 and 15 - 4Byteeight bits
An individual keyboard character - 5Kilobyte1024 bytes
paragraph of texts (about 200 words) - 6Megabyte1024 kilobytes
one minute average-quality MP3 music - 7Gigabyte1024 megabytes
90 min. of standard definition video - 8Terabytes1024 gigabytes
longer video - 9Petabyte1024 terabytes
- 10Exabyte1024 petabytes
- 11Zettabyte1024 exabytes
- 12Yottabyte1024 zettabytes
- 13Reason of replacing binary numbers to hexadecimal numbersdecrease mistakes from human being
- 14character setStores the binary values of all the characters that computer is capable of using.
- 15ASCIIStands for American Standard Code for information Interchange, Kind of character set.
Store 128 different characters
"101001" - 16UnicodeKind of character set
store 65,536 different characters
"0110 0101 0000 0010" - 17AND0 + 0 = 0
0 + 1 = 0
1 + 0 = 0
1 + 1 = 1 - 18OR0 + 0 = 0
0 + 1 = 1
1 + 0 = 1
1 + 1 = 1 - 19NOT1 and 0
0 and 1 - 20Logic gatesAllow calculation and other operations to take place by reading one or more inputs and providing outputs. ( AND, OR and NOT)
- 21data typecontrols what kind of data can be stored in a particular part of the memory, e.g. Boolean, Character, String, Integer and Real.
- 22Booleancan be either true or false, requires one bit of storage
- 23StringTo store any number of characters
- 24realdecimal numbers
- 25Type of instruction in binary1. operator - tells the computer what task to carry out, e.g. addition, subtraction
2. operand - tells the computer what data the operator applies to - 26Sampling rate / sampling intervalrefers how often the computer takes a measure of the sound, including volume and frequency. Higher sampling rate, better quality of sound.
- 27bit ratenumber of bits are sued in each sample (bits per second). Higher bit rates, higher quality of sound but higher storage requirement.
- 28ImagesDivided into pixels - a pixel can only be one color in a time. More bits store in pixels, more colors available.
- 29MetadataExtra information that is stored with the pixels, such as height width, color depth (number of bits in each pixel) and the "birth" of the image
Informações
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- GCSE Computing FlashCards sobre 2. Data Representation, criado por Jeffrey Yip em 04-04-2017.
- Criado por
- Jeffrey Yip
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