Computer Science 7517/2 June 2019

AQA A Level Computer science (7517) Jun 2019

معلم موافق رایگان بودن است.

The exam evaluates computer science concepts, including network protocols, relational databases, Boolean algebra, and encryption techniques. Topics include TCP/IP stack functions, database normalization with entity-relationship diagrams, and SQL query corrections. Programming concepts explore floating-point representation, assembly language implementation, and asynchronous communication systems. Boolean algebra tasks involve truth tables, logic circuits, and simplifying expressions. Data compression techniques, differences between lossy and lossless methods, and their effectiveness are analyzed. Cryptographic sections cover Vernam cipher decryption, symmetric key challenges, and digital signature verification in asymmetric encryption. The paper emphasizes problem-solving, theoretical analysis, and practical applications of computer science principles.