Leaving Cert Computer Science Notes
Free Leaving Cert Computer Science revision notes for Higher Level. Browse 21 topics and read online without an account.
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Revise algorithms, computational thinking, databases and data representation alongside Python, JavaScript, embedded systems and machine learning.
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AlgorithmsIllustrated explanations.Computational ThinkingComputational thinking is not about thinking like a machine; it is a human problem-solving methodology that allows us to understand problems and design…Pseudocode and FlowchartsBefore writing code in Python, algorithms are planned using pseudocode or flowcharts.Communication ProtocolsA communication protocol is an agreed set of rules that says how devices on a network must format, address, send, receive, and check data.Communication Protocols, World Wide Web & the InternetEvery time you open a web page, make a voice call or stream video, your device follows agreed rules to exchange data with systems worldwide.Computer SystemsA computer system relies on both physical equipment and intangible instructions to operate.Logic GatesIf a circuit had to differentiate between ten discrete voltage levels (one for each decimal digit), the margins between levels would be very narrow.Computers and SocietyComputing touches nearly every part of daily life.History of ComputingThe history of computing traces the shift from mechanical calculation to programmable electronic systems, global networks, and autonomous algorithms.Data AnalysisData analysis means taking messy raw data, tidying it up, summarising it with a program, and using what you find to make a decision.DatabasesIn a file-based system, data is kept in separate flat files, such as CSV or plain text files, where each individual program manages and reads its own files.Data RepresentationPhysical phenomena in the natural world are continuous. Sound waves, ambient temperature and light levels change smoothly across an infinite range of values.Digital and Analogue InputComputers process data exclusively using discrete binary values, yet the physical world presents continuous phenomena such as temperature, light, and sound.Embedded SystemsBecause microprocessors operate only on binary numbers, an Analogue-to-Digital Converter (ADC) must sample the continuous analogue voltage and convert it…Machine Learning and Artificial IntelligenceArtificial intelligence and machine learning represent a fundamental shift from traditional hand-coded programs to systems that detect patterns in data.Modelling and SimulationSome problems are too complicated, too dangerous or too slow to study for real: you cannot crash a hundred cars to test a bumper, and there is no single…HTML/CSSEvery website on the World Wide Web relies on HTML and CSS functioning together under a client-server architecture.JavaScriptJavaScript is a high-level, interpreted, event-driven programming language. Code is executed by the engine inside the browser as the page runs.PythonA variable is a named reference to a value stored in computer memory. You assign values using the single equals sign (=), which is the assignment operator.Software Design and DevelopmentBuilding reliable software requires a structured process.User Experience and User InterfaceUser-Centred Design (UCD) puts the needs, preferences, and limitations of end users at the centre of every design decision.
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