1) What number system do computers use to represent data? a) Decimal b) Denary c) Binary d) Hexadecimal 2) What is the binary value of the decimal number 10? a) 00001111 b) 00001010 c) 00001001 d) 00001100 3) How many bits are in a byte? a) 4 b) 2 c) 16 d) 8 4) What is colour depth? a) The number of colours in an image b) The size of the image file c) The number of bits used per pixel d) The resolution 5) What is the file size (in bits) of an image with 100 pixels and 8-bit colour depth? a) 100 bits b) 800 bits c) 80 bits d) 8 bits 6) What is meant by resolution in an image? a) The size of each pixel b) The number of pixels in width * height c) The file size in bytes d) The number of colours used 7) Which of these would increase the file size of a sound file? a) Lower sample rate b) Lower sample size c) Higher sample rate d) Fewer channels 8) What is the formula for calculating sound file size? a) Sample rate * sample size * channels b) Sample rate * sample size * duration c) Resolution * colour depth d) Bitrate / time 9) What is 255 (denary) in binary? a) 11111111 b) 100000000 c) 11110011 d) 01111110 10) What is 64 (denary) in binary? a) 00000011 b) 01000001 c) 01000000 d) 01010101

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