Computer Science 7517/2 June 2023

AQA A Level Computer science (7517) Jun 2023

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The exam evaluates computer science concepts, including networking, encryption, databases, and functional programming. Topics include packet structure, checksum usage, Caesar and Vernam ciphers, and TCP/IP stack functionality. Relational database tasks involve normalizing designs, correcting SQL errors, and discussing CRUD operations in RESTful applications. Data representation covers floating-point precision, error types, and masking with assembly language. Boolean algebra is assessed through logic circuit design and expression simplification. Networking examines asynchronous transmission, synchronous communication, and Big Data characteristics. Functional programming includes recursion and functional decomposition, while security topics address asymmetric encryption and digital signatures. Emphasis is on theoretical understanding and practical applications.