Blog

A topic-by-topic AQA A-Level Computer Science (7517) revision guide to networking and communication — the TCP/IP stack, IP addressing, protocols, encryption and digital signatures, and network security.

A topic-by-topic AQA A-Level Computer Science (7517) revision guide to programming and object-oriented programming — OOP principles, inheritance and polymorphism, recursion, exception handling, and the four programming paradigms.

A topic-by-topic AQA A-Level Computer Science (7517) revision guide to Theory of Computation — finite-state machines, regular expressions, BNF, Turing machines, the halting problem and algorithm complexity.

A topic-by-topic OCR A-Level Computer Science (H446) revision guide to algorithms — searching, sorting, graph traversal, Dijkstra's algorithm, A*, recursion, Big O notation, and computational tractability.

A topic-by-topic revision guide for OCR A-Level Computer Science (H446) Boolean algebra and logic — logic gates, truth tables, Boolean laws, De Morgan's laws, expression simplification, Karnaugh maps, logic circuits, adders and flip-flops.

An OCR A-Level Computer Science (H446) revision guide to computational thinking and theory of computation — abstraction, decomposition, concurrency, finite state machines, regular expressions, BNF, Turing machines and the Chomsky hierarchy.

A topic-by-topic revision guide for OCR A-Level Computer Science (H446) data representation — number systems, binary arithmetic, two's complement and fixed point, floating point, character encoding, image and sound representation, compression, encryption and error detection.

A topic-by-topic OCR A-Level Computer Science (H446) revision guide to data structures — arrays, records, linked lists, stacks, queues, binary trees, graphs, hash tables, vectors, and abstract data types.

A topic-by-topic OCR A-Level Computer Science (H446) revision guide to databases and the law — relational concepts, normalisation, SQL, transactions, big data, the Data Protection Act, Computer Misuse Act, intellectual property and ethics.

A complete OCR A-Level Computer Science (H446) exam-preparation revision guide covering Paper 1 (Computer Systems), Paper 2 (Algorithms and Programming), the NEA programming project (03/04) and proven revision strategies for the final run-in.

A topic-by-topic OCR A-Level Computer Science (H446) revision guide to networks and communication — network types, topologies, hardware, protocols, TCP/IP, packet switching, web technologies, security, and wireless networking.

A topic-by-topic revision guide for OCR A-Level Computer Science (H446) processors and hardware — CPU architecture, the fetch-decode-execute cycle, CISC vs RISC, pipelining, input and output devices, primary and secondary storage, and embedded systems.