- Give two reasons why computers use binary numbers to represent and store data.(2)
- Represent 0111 0100 in decimal.(1)
- Describe how graphics are stored using a bit-mapped package.(2)
- An image is 4 x 6 inches, has a resolution of 800 dpi and each pixel can display 65,536 different colours. Calculate the storage requirements of this image. Express your answer using suitable units. Show all working. (3)
- State two advantages of storing the above image as a vector graphic rather than a bit-map.(2)
- Represent 13.25 in floating point notation. Express the mantissa in 16-bits and the exponent in 8-bits.(2)
- What is meant by the term lossless compression?(1)
- Explain how the Unicode system overcomes the limitations of ASCII.(1)
- How many different colours could be represented with a bit depth of one byte(1)

Out of 15.

sir how do you do 4? i know what the answer is but only cause my book tells me how many bits per pixel 65,536 colours can be used, whats the calculation that you do?

The trick in this question is to workout the number of pixels in the length and breadth, from there on in, it’s just like last weeks homework.