1) What is digital data? a) lots of 1s and 0s b) lots of numbers c) lots of letters d) Lots of numbers and letters 2) what counting system does digital data use? a) Denary b) Binary c) hexadecimal 3) Why does a computer use binary? a) Because computers use electrical signals - on and off b) because computers can't read c) because computers can't speak 4) how are the electrical signals on and off represented in binary? a) On = 2 and Off = 3 b) On = 10 and Off = 5 c) On = 1 and Off = 0 5) which of these binary numbers is equal to 1 byte? a) 00100 b) 000100 c) 000110001 d) 00001111 6) How many colours can be represented in a 1 bit image a) 8 b) 3 c) 6 d) 1 e) 4 f) 2 7) if you want more colours in your image you need more..... a) parts per pixel b) bits per pixel c) pieces per pixel d) dots per pixel

3. All about data!

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