1) For a computer to process data, images and sound, they must be converted to: a) analogue form b) digital form c) computer form 2) The smallest unit of computer storage is a: a) bit b) nibble c) byte 3) Which number system do computers use: a) decimal b) base 10 c) binary d) digital 4) Data is a) meaningless until processed b) meaningful c) processed d) in context 5) Information is a) raw facts and figures b) meaningless c) data that has been processed to give meaning d) meaningful and unprocessed data 6) what is a pixel? a) a tiny square of colour in a digital image b) a tiny dot in a digital image c) a tiny woodland fairy 7) A bitmap is a digital image composed of: a) lines b) curves c) dots d) pixels 8) A vector is a digital image made up of a) lines and curves b) dots c) pixels 9) another name for a bitmap image is a) vector b) raster c) bob marley 10) What is a boolean data type? a) can have a true or false value only b) can have any value c) must contain numbers 11) how many bits in a byte? a) 2 b) 4 c) 6 d) 8 12) How many bytes in a kilobyte (kB)? a) 100 b) 124 c) 1000 d) 1024 13) How many characters are in the word 'digital'? a) 8 b) 56 c) 7 14) What does ASCII stand for? a) Access System Computer Information Interchange b) American System for Computer Information Interchange c) ASCII System for Computer Information Interchange 15) A vector image is fully scalable a) true b) false 16) a bitmap image depends on resolution a) true b) false 17) a bitmap image takes up less storage space than the vector equivalent a) true b) false 18) What helps the streaming of live video by storing data until it is ready to be viewed? a) memory b) buffer c) duffer d) bandwidth 19) What is used to convert analogue sound to digital? a) a microphone b) a digital to analogue converter c) an analogue to digital converter d) a sampling machine 20) What is the process of converting analogue sound to digital called? a) sound processing b) sampling c) sampling rate d) sound conversion 21) What is the sample rate measured in? a) bps b) Hz c) ddi d) ppi 22) How many colours will an image with a colour depth of 2 bits have? a) 2 b) 4 c) 8 d) 1 23) Bit depth for sound is: a) the number of samples taken b) the number of bits in each second of sound c) the number of bits in each sample of sound 24) Data portability is a) data entering portals b) transfer of data from one application to another 25) What does jpeg stand for? a) Joint Picture Expert Group b) Joint Photographic Expert Group c) Joint Pixel Experts Group 26) What does GIF stand for? a) Graphics Image Format b) Graphics Image File c) Graphics Interchange Format d) Graphics Interchange File 27) PDF is an acronym for which file type? a) image b) sound c) vidoe d) text 28) what are the two compression techniques you learned about? a) lossy and lossful b) loss and lossless c) loss and losing d) lossy and lossless 29) I remove data from the file that cannot be restored to reduce the file size a) lossless compression b) data compression c) lossy compression 30) Compressing a file to a size small enough to facilitate data transfer without impacting too much on quality is called: a) file compression b) data compression c) file optimisation

GCSE Digital Data Review

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