Computer Science 7516/2 June 2018

AQA AS Level Computer Science(7516) Jun 2018

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The exam focuses on computational theory, binary systems, encryption, networking, and data representation. Key topics include two’s complement arithmetic, hexadecimal-binary conversions, and memory unit ordering. Digital data representation explores analog vs. digital differences, MIDI advantages, and bitmap image file size calculations. Networking concepts cover encryption methods like Vernam and Caesar ciphers, client-server architectures, and physical vs. logical network topology. Boolean algebra tasks include logic circuit design and Boolean simplifications. Assembly language exercises test opcode calculations, addressing modes, and program implementation. Operating system roles, ethical issues in driverless cars, and the stored-program concept enhance theoretical and applied understanding.