Why Operating Systems and Utility Programs are Necessary. (6 marks)
Explain why operating systems and utility programs are necessary for a computer system.
Why Operating Systems and Utility Programs are Necessary. (6 marks) Read More »
AQA (8525)
Differences between High-Level Languages and Low-Level Languages. (2 marks)
Explain the main differences between high-level languages and low-level languages.
Differences between High-Level Languages and Low-Level Languages. (2 marks) Read More »
Hardware and Software Interaction (2 marks)
Explain one way in which hardware and software interact in a computer system.
Hardware and Software Interaction (2 marks) Read More »
Sound File Calculations (3 marks)
A sound file has a sampling rate of 44.1 kHz and a sample resolution of 16 bits. If the sound is recorded for 5 seconds, calculate the size of the resulting digital sound file in bits.
Sound File Calculations (3 marks) Read More »
Why Compress? (2 marks)
Define data compression and explain why it is often necessary to compress data.
Why Compress? (2 marks) Read More »
Run Length Encoding (5 marks)
Describe how run length encoding (RLE) compresses data and give the RLE representation for the following binary sequence: “0001110011”.
Run Length Encoding (5 marks) Read More »
RLE Frequency/Data Pairs (3 marks)
Convert the bitmap representation “1100011111” into RLE frequency/data pairs.
RLE Frequency/Data Pairs (3 marks) Read More »
Sample Resolution (2 marks)
Define ‘sample resolution’ in the context of sound digitisation.
Sample Resolution (2 marks) Read More »
Advantage and Disadvantage of Increasing the Sample Rate and Resolution (4 marks)
Describe one advantage and one disadvantage of increasing the sample rate and resolution of a digital sound file.
Advantage and Disadvantage of Increasing the Sample Rate and Resolution (4 marks) Read More »
Effect of Resolution and Colour Depth (4 marks)
A bitmap image is made up of pixels. Describe how changing the number of pixels and colour depth can affect the file size and quality of a bitmap image.
Effect of Resolution and Colour Depth (4 marks) Read More »