Understanding Data Compression (2 mark)
Explain why data compression is needed in computer systems.
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Compression
RLE Frequency/Data Pairs (3 marks)
Convert the bitmap representation “1100011111” into RLE frequency/data pairs.
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Run Length Encoding (5 marks)
Describe how run length encoding (RLE) compresses data and give the RLE representation for the following binary sequence: “0001110011”.
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Why Compress? (2 marks)
Define data compression and explain why it is often necessary to compress data.
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Compression Effects on File Size (3 marks)
A photographer decides to save space by compressing photo archives. The photographer considers both lossy and lossless methods. Compare the effects of each type of compression on file size and image quality, providing examples of suitable file formats for each type.
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Compression Advantages and Disadvantages (4 marks)
Discuss the advantages and disadvantages of using lossy compression for online video streaming services.
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Compression in Practice (2 marks)
A company decides to archive its documents. Would it be more appropriate to use lossy or lossless compression? Justify your answer considering the nature of the data involved.
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Types of Compression (4 marks)
Define the terms lossy and lossless compression and give one example of where each type might be used.
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Understanding Compression (2 mark)
Explain why data compression is necessary in modern computing. Provide one common scenario where compression is applied.
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Compression 3
A programmer wishes to compress their source code file, before sending it to a colleague for review. Which method of compression should they use and why?
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