Data Representation Practice Questions
1.
Data is stored in memory using bits.
What is the largest positive number that can be stored using 4 bits?
2
2.
A program calculates the wage of a worker as £314.36
Describe how a number like 314.36 is stored in the computer.
2
3.
Data is stored in memory using bits.
What is the larges positive number that can be stored using 7 bits?
2
4.
A screen has a resolution of 320 x 320.
(a)
Explain what is meant by the term resolution.
(b)
A black and white image filling the screen is displayed on the screen.
Calculate the storage requirements of the image in kilobytes. Show all
working.
2
2
5.
Convert the number 131 to a binary number.
1
6.
Explain how real numbers are stored using floating point representation.
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7.
Each pixel in a photograph uses 1 bit of memory. A photograph measures 256
pixels across and 80 pixels down. How much memory in kilobytes will it take to store
each photograph? Show all working.
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8.
A picture is stored as a bitmap. Describe how information is stored in a bitmap.
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