Binary to Decimal (2 marks)
Express the binary number 110101 in decimal.
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Data Representation
Why Hexadecimal? (2 marks)
Explain why hexadecimal is often used in computer science to represent binary numbers.
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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 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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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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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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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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Impact on File Size and Quality (3 Marks)
Describe how the following factors affect the size of a sound file and the quality of its playback. Provide one point for each factor: a) Sample rate (Hz) b) Duration (seconds) c) Bit depth (e.g., 16-bit)
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Sound File Calculation and Justification (3 Marks)
A recording studio needs to digitise a 2-minute audio clip for a client who wants a balance between good quality and manageable file size. They are considering a sample rate of 44.1kHz and a bit depth of 16 bits. Calculate the approximate size of the resulting digital audio file and discuss whether this setup is
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