Computer Science study guides

A deep-dive Edexcel GCSE Computer Science guide to Topic 1 Computational thinking. Covers decomposition and abstraction, writing and following algorithms with sequence, selection and repetition, variables and data structures, the operators, trace tables, error types, the standard searching and sorting algorithms, evaluating efficiency, and truth tables with up to three inputs.

A deep-dive Edexcel GCSE Computer Science guide to Topic 2 Data. Covers why computers use binary and the number of states a pattern holds, unsigned and two's complement signed integers, denary-binary conversion, binary addition and shifts, overflow, hexadecimal, 7-bit ASCII, bitmap images, sampled sound, the binary storage multiples and file-size calculations, and lossy and lossless compression.

A deep-dive Edexcel GCSE Computer Science guide to Topic 3 Computers. Covers the von Neumann stored program concept and the fetch-decode-execute cycle, secondary storage (magnetic, optical, solid state), embedded systems, the operating system's four functions, utility software, developing robust software, and low-level versus high-level languages with compilers and interpreters.

A deep-dive Edexcel GCSE Computer Science guide to Topic 4 Networks. Covers why computers are networked, LANs and WANs, how the internet is structured with IP addressing and routers, wired and wireless performance and transmission-time calculations, the network and email protocols, the four-layer TCP/IP model, bus, star and mesh topologies, and network security.

A deep-dive Edexcel GCSE Computer Science guide to Topic 5 Issues and impact. Covers the environmental impact of digital devices, the ethical and legal issues of personal data, the ethics of artificial intelligence, machine learning and robotics, intellectual property protection, and cybersecurity threats and protection methods.

A deep-dive Edexcel GCSE Computer Science guide to Topic 6 Problem solving with programming, the onscreen Python paper. Covers developing and debugging code, the program constructs, primitive and structured data types, string handling, input, output and CSV files, validation, authentication and subprograms.