Computer Science 7516 Paper 2 June 2020, AQA AS-Level Past Papers with Mark Schemes

AQA AS Level Computer Science(7516) Jun 2020

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The exam focuses on computer science fundamentals, addressing data representation, computational processes, and network principles. Topics include hexadecimal-to-decimal conversion, binary arithmetic, error detection through majority voting, and check digit generation. Data compression techniques such as dictionary-based and lossless methods are analyzed alongside image file storage calculations. Networking concepts cover logical bus topology, parity error detection, and serial versus parallel transmission benefits. Assembly programming tasks include Caesar cipher encryption and immediate addressing. The Fetch-Execute cycle, stored-program concept, and bidirectional data bus operations are explored. Ethical considerations involve wearable technology for healthcare, emphasizing moral, legal, and cultural issues.