# Homework 7 data representation

## Quiz by sharon Hockley

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8 questions

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- Q1What is bit rate?the number or bits stored in each audio samplethe number of bits used to store the colour of the pixelThe number of bits used per second of audionumber of pixels in an image30s
- Q2Calculate how many different colours a 5 bit image can use321651030s
- Q3All bitmap images have some form of metadataTrueFalse30s
- Q4What is colour Depth?The number of different colours availablethe size of the imageThe number of bits used for each pixelthe number of samples taken a second30s
- Q5What is meant by the term sampling frequency?The number of samples taken per secondthe length of the audio trackthe number of samples taken per minutethe number of bits used to record each sample30s
- Q6What is the formula that relates bit rate, sample frequency and sample size?Sampling frequency = Bit rate x Sample sizeBit rate = sample size / sampling frequencyBit rate = sampling frequency x Sample sizeSample Size = Sampling frequency x Bit rate30s
- Q7What does compressing a file mean?Improving the quality of the fileIncreasing the size of the fileReducing the size of the fileAlways keeping the original quality of the file30s
- Q8Lossless compression temporarily removes dataTrueFalse30s