Pixels and Resolution (1 mark)
Explain what is meant by the term ‘resolution’ in the context of bitmap images.
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Pearson Edexcel (2020)
Binary Representation of Images (2 marks)
Describe how a single pixel is represented in binary within a bitmap image.
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What does ASCII stand for? (1 mark)
Explain what ASCII stands for.
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The ASCII Character Set (2 marks)
Describe how the ASCII encoding scheme works.
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Why Hex? (2 marks)
Explain why hexadecimal notation is often used in computing instead of binary or decimal notation.
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Hexadecimal to Binary (1 mark)
The hexadecimal number 2E is to be converted into a binary number. Provide the binary equivalent of 2E.
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Binary to Hexadecimal (2 marks)
Given the binary number 11100101, convert it to its hexadecimal equivalent.
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Arithmetic Shift (5 marks)
Perform an arithmetic shift to the left by 3 positions on the binary number 01010101 for a signed 8-bit binary representation. Explain the difference between an arithmetic shift and a logical shift in this context.
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Logical Shift (4 marks)
Apply a logical shift to the right by 2 positions on the binary number 10110011. State the result and explain the effect of this operation.
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Adding Binary Patterns (3 marks)
Add the following two binary numbers: 11001010 and 01110101.
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