Computer Science 8520/2 June 2021

AQA GCSE Computer Science (8525 & 8520) Jun 2021

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The exam assesses computing concepts for GCSE Computer Science, focusing on data representation, systems architecture, and networking. Topics include binary and hexadecimal conversion, logic gates, truth tables, CPU performance factors (clock speed, cores, cache), and the role of embedded systems. Networking content covers firewalls, authentication, TCP/IP protocols, and social engineering examples like phishing and blagging. Questions explore file size calculations for sound recordings, Run Length Encoding, Huffman coding, and the ethical implications of human microchip implants. Emphasis is placed on data security, compression techniques, and the practical applications of computer systems. Keywords: GCSE Computer Science, binary, logic gates, CPU, networking, compression, security.