Data Representation Flashcards
1 bit =
• 1 byte =
• A nibble =
• 1 kB (kilobyte) =
• 1 MB (megabyte) =
• 1 GB (gigabyte) =
• 1 TB (terabyte) =
• 1 PB (petabyte) =
1 bit = a single 0 or 1
• 1 byte = 8 bits = 1 character of text
• (A nibble = 4 bits or half a byte)
• 1 kB (kilobyte) = 1000 bytes
• 1 MB (megabyte) = 1000 kB or 1000x1000 bytes
• 1 GB (gigabyte) = 1000 MB
• 1 TB (terabyte) = 1000 GB
• 1 PB (petabyte) = 1000 TB
Deneary to Binary
a) 18
b) 57
a) 10010
b) 111001
Show the possivle combinatioms or states per bit:
1 bit =
2 bits =
3 bits =
1 bit = 2
2 bits = 4
3 bits = 8
What is 1001 (binary) in denary?
9
How do you know if binary numbers are even or odd?
Even numbers have a 0 at the end and odd numbers have a 1
How do you translate 2A hex to denary?
2 x 16 = 32
Add the A equal to 10
= 42
How to convert denary to hex.
Divide the denary number by 16 and the remained will be the last digit
E.g 18/16 = 1 r 2 so the hex value for 18 is 12
Binary to hex conversion
Divide the binary into two nibbles of 4 bits and then convert each nibble to it’s hex value. Eg
11100101 ~> 1110 = E in hex and 0101 = 5 in hex therefore 11100101 = E5
Advantages of using Hex?
- Much easier to remember a hex value than a binary value
- Quicker to type or write hex
- Easy to convert between Hex and binary
- People make less errors with fewer digits
Binary addition rules:
0 + 0 =
0 + 1 =
1 + 0 =
1 + 1 =
1 + 1 + 1 =
0 + 0 = 0
0 + 1 = 1
1 + 0 = 1
1 + 1 = 0 Carry 1
1 + 1 + 1 = 1 Carry 1
What does a left and right binary shift do?
Left shifts multipy and right shifts divide by 2
What error does it cause when an addition is too large?
Overflow error
What are the two main character sets?
ASCII and Unicode
Types of bitmap image file formats
BMP, JPG, GIF, PNG
Type of vector format
SVG
