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 »
Compare lossless and lossy compression in terms of their methodology.
Comparing Compression Methods (2 marks) Read More »
Calculate the file size in mebibytes of a text document that contains 450,000 characters, assuming each character is stored in one byte.
Calculate File Size in Mebibytes (2 marks) Read More »
A video file is 1.5 gibibytes in size. How many such files can be stored on a 16 gibibyte USB stick?
Gibibytes and Storage (3 marks) Read More »
A database uses 2 bytes to store a single character. Write an expression to calculate the file size in bytes, then carry out the calculation, for a database entry that contains 3,000 characters.
Calculating Storage Needs (2 marks) Read More »
A photograph is stored as a 24-bit bitmap image with a resolution of 1280 x 1024 pixels. Calculate the file size in kibibytes.
Bitmap Storage Requirements (4 marks) Read More »
Explain why data compression is needed in computer systems.
Understanding Data Compression (2 mark) Read More »
What is ‘bit depth’ in the context of sound and why is it significant when converting analogue sound to binary?
Bit Depth (2 marks) Read More »
Describe the entire process of how analogue sound is represented in binary, referring specifically to amplitude, sample rate, bit depth, and sample interval.
Sound Representation (6 marks) Read More »
