Image Resolution (3 marks)
Define image resolution and explain how increasing the resolution affects both the quality of an image and its file size.
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1.2 – Memory and Storage
Metadata in Images (2 marks)
What is metadata in the context of digital images, and give two examples of information it might contain.
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Binary Representation of Characters (2 Marks)
Explain the process of representing characters in binary and discuss why different character sets may use varying numbers of bits.
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Character Sets (3 Marks)
Define ‘character set’ and compare ASCII and Unicode in terms of character capacity and global applicability.
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Understanding Character Sets and Bits (4 Marks)
How does the number of bits per character in a character set influence the number of unique characters that can be represented? Provide examples from ASCII and Unicode.
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Understanding Binary Representation of Images (2 marks)
Explain how an image is represented using pixels and binary code.
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Explaining Overflow Errors (2 marks)
Explain what is meant by an overflow error when adding two binary integers. Provide an example with an 8-bit binary addition that results in an overflow.
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Adding Binary Integers (3 marks)
Add the binary numbers 1101 and 1011. Show your working, including handling any overflow.
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Conversion of Denary to Hexadecimal (3 marks)
Convert the denary number 225 into a 2-digit hexadecimal number. Show your working.
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Binary to Hexadecimal Conversion (3 marks)
Convert the binary number 11010110 to its hexadecimal equivalent. Show your working.
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