Flashcards
Computer Science Assessment
Cards in this deck (13)
- 1Hexadecimal Order0 1 2 3 4 5 6 7 8 9 A B C D E F
BASE 16 - 2Units of Data StorageNibble=4bits
Byte=8bits
Kilobyte=1000bytes
Megabyte=1000kilobytes
Gigabyte=1000megabytes
Terabyte=1000gigabytes
Petabyte=1000terabytes - 3Binary Multiply by 2, 4, 8x2= shift to left once
x4= shift to left twice
x8= shift to left three times - 4Binary Addition1+1=0 carry the 1
0+0=0
1+1+1= 1 carry the one - 5What is MSB and LSBMSB=Most Significant Bit
LSB=Least Significant Bit
LSB is always the number furthest to the left - 6How many bits does ASCII use?ASCII uses 8 bits to represent 256 characters
- 7How many bits does Unicode use?Unicode uses 16 Bits to represent 65536 characters
- 8How do you calculate sound file size?Sample rate x duration(s) x bit depth
- 9How do you calculate image file size?Height x length x colour depth
- 10How do you calculate text file size?Bits per character x Number of characters
- 11Lossy CompressionReduces file size of image by eliminating data. Examples of this is JPEG, MP4, MP3, MPEG
- 12Lossless CompressionA compression technique that does not eliminate any data, rather it packs it into a smaller file size. Examples of this are PNG, ZIP, GIF.
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