A bitmap image is made up of pixels. Describe how changing the number of pixels and colour depth can affect the file size and quality of a bitmap image.
Effect of Resolution and Colour Depth (4 marks) Read More »
A bitmap image has a width of 800 pixels and a height of 600 pixels. If the colour depth is 24 bits, calculate the file size in bytes.
Bitmap File Size Calculation (3 marks) Read More »
Explain what a pixel is and how it relates to the way an image is displayed on a screen.
Describe two advantages of using Unicode over ASCII for character encoding.
Advantages of Unicode over ASCII (4 marks) Read More »
Define the term ‘character set’ and explain the purpose of Unicode as a character encoding method.
Character Set Definition (2 marks) Read More »
Add the following 8-bit binary numbers (bytes): 11011100 and 10100101. Provide the final sum in binary form.
Adding Binary Bytes (3 marks) Read More »
Perform a left logical shift by three places on the binary number 00011001. State the resulting binary number and explain how the value of the number has changed.
Result of a Left Binary Shift (2 marks) Read More »
A binary number 11010110 is to be shifted to the right by two places. Write the new binary number after the shift and explain the impact of this shift on the number’s value.
Logical Binary Shift (2 marks) Read More »
Convert the following quantities of bytes into the largest whole unit possible and express the result as a whole number: 1,500,000 bytes and 12,000,000 bytes. State the unit and the corresponding value.
When a storage device is advertised as having a capacity of 2 gigabytes (GB), this might actually refer to gibibytes (GiB) since these terms are sometimes used interchangeably but incorrectly so. Explain whether the advertised capacity will appear larger, smaller, or the same when measured in gibibytes (GiB), and justify your answer based on the
Giga vs Gibi (4 marks) Read More »
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