An uncompressed audio file has a size of 50MB. After applying a lossless compression technique, the file size is reduced to 30MB. Calculate the compression ratio and express it as a percentage of the original size.
Calculation of Compression Ratios (4 marks) Read More »
Explain why compression is important when transmitting data over the Internet.
Impact of Compression (2 marks) Read More »
A text file uses 8 bits to represent each character. A compressed version of the file uses a variable-length code which uses an average of 5 bits per character. Calculate the compression ratio.
Application of Compression (4 marks) Read More »
Discuss one advantage and one disadvantage of using lossy compression for images.
Lossy Advantages and Disadvantages (2 marks) Read More »
Describe the difference between lossy and lossless compression.
Types of Data Compression (2 marks) Read More »
Explain what is meant by ‘data compression’.
Principles of Data Compression (1 mark) Read More »
Evaluate the impact of using lossy compression on a text file and a music file. Discuss the consequences for each file type.
Evaluating Compression Methods (4 marks) Read More »
Describe a situation where lossy compression would be more appropriate than lossless compression.
Applying Knowledge of Compression (1 marks) Read More »
Compare lossless and lossy compression in terms of their methodology.
Comparing Compression Methods (2 marks) Read More »
Identify whether the following statement is true or false: “Lossless compression methods can significantly reduce the file size without any loss of data quality.” (Indicate True or False for one mark)
Identifying Data Compression Types (1 mark) Read More »
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