Flashcards
computing flash cards '1'
Cards in this deck (15)
- 1State two characteristics, other than cache memory, that can improve the performance of CPUsClock speed
Number of processors
Cache type - 2The ASCII character set uses seven bits to encode every character. What is the total number of characteristics that can be encoded in ASCII?127 or 128
- 3Explain the possible limitations of using ASCII character set for global comunicationASCII is in 7 bit
Doesn't have enough space for accented letters
it can only represent 127 characters and English already takes up all of that - 4Give one reason why we use binary to represent data in computersThey can only represent on or off
- 5Identify 4 events that take place during the fetch execute cycleFetch
Decode
Execute
Store - 6state 2 differences between ASCII and UNICODEUNICODE has emojis and more characters, it can also be 16 or 32 bit
ASCII is 7 bit, has limited values. limited to english - 7Describe what is meant by colour depth in regards to representing images as binaryNumber of bits used to represent each pixel
- 8Describe what is meant by sample resolution depth in regards to representing sound as binaryNumber of bits per sample
- 9Describe what is meant by sample rate in regards to representing sound as binarysampling rate is the number of samples taken in a second and is usually measured in hertz (1 hertz = 1 sample ps)
- 10A sound has a sample rate of 44,100 , a sample resolution of 16 bits per sample and lasts 1 minute Calculate the file size44,100 X 16 X 60 = 42,336,000
- 11Compress the following bitmap in run length encoding 0000001111100000111000(6,0)(5,1)(5,0)(3,1)(3,0)
- 12State 2 differences between ROM and RAMRAM cannot be written too
RAM holds open applications and data - 13Give 2 examples of secondary storageMagnetic
Solid State - 14How do you calculate the file size of an image?Width X Height X Colour Depth = ...bits
- 15How do you calculate the file size of a sound file?Sample rate X Sample resolution X time spent sampling (seconds) = ...bits
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- GCSE Computing Flashcards on computing flash cards '1', created by Matthew Dallow on 28/03/2017.
- Created by
- Matthew Dallow · Mar 2017
- Updated
- Mar 28, 2017
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