GCSE Computer Science 9-1 J276 OCR syllabus

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OCR 9-1 GCSE COMPUTING

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OCR 9-1 (J276) GCSE Computer Science

The material on this site is not endorsed by the OCR examination board. We do not guarantee that it covers all of the relevant theory that is required for the examination. Please refer to the J276 syllabus to ensure that you are covering the material to the standard required.

GCSE 9-1 (J276) Computer Science
1.1	Architecture	What is a computer system?	Computer system Input, process, output, storage Data bus Embedded computer
		The purpose and components of the CPU	Control unit ALU Registers Cache Clock
		Von Neumann architecture	Von Neumann architecture MAR & MDR Program Counter Accumulator Harvard architecture
		Fetch-Decode-Execute cycle	Registers involved Fetch, decode, execute cycle
		CPU performance factors	Clock speed Multi-core processors Cache RAM Graphics GPU
1.2	Memory	Memory types	Main memory Volatile memory - what is it? RAM DRAM SRAM ROM Virtual memory
1.3	Storage	Secondary storage	Storage media & devices Magnetic storage Optical storage Solid state media Data capacity Calculating storage
1.4	WiFi and Wired networks	Types of networks	What is a network? Home networks Business networks LANs WANs
		Performance of networks	Bandwidth Wired performance Bands and channels Wi-Fi performance Error rate Latency
		Client/Server and Peer-to-Peer	Client server networks Peer-to-peer networks
		Hardware needed	NIC Hub Switch Router Cables WAP and Wi-Fi
		DNS, IP addressing, web hosting and the cloud	ISP URL IP address DNS Web sites Local hosting External hosting The Cloud
		Virtual Networks	Standard networks Virtual networks
1.5	Networks	Network topologies	Star network Mesh network

		Protocols	Protocols TCP/IP HTTP / HTTPs FTP POP, IMAP, SMTP Ethernet The four layer model
		Packet Switching	Circuit switching Packet switching
1.6	Network security	Introduction to network security	Network security Why is it important?
		Network threats	Malware Social engineering Phishing Brute force Denial of service Data interception SQL injection Poor network policy
		Malware	Malware Viruses Worms Browser malware
		Preventing vulnerabilities	User access rights Passwords Network policy Acceptable use policy Backups Disaster recovery Network forensics Anti-malware Firewall Penetration testing Encryption
1.7	Systems Software	Operating System	Kernel User interface Memory management Multi-tasking OS Device drivers User management
1.7	Systems Software	Utility software	Encryption utilities Defragmentation utilities Compression Backup Information & diagnostics
1.8	Ethical and legal	Legislation	Data Protection Act General Data Protection Regulation (GPDR) Computer Misuse Act Copyright, Designs & Patents Act Freedom of Information Act
		Environment	Ewaste Sustainability Recycling Energy Monitoring Stakeholders
		Privacy & technology	DNA profiling National Identity cards CCTV Electronic tracking Personal data Stakeholders
		Ethics & technology	Digital divide Genetic screening Whistleblowers Self driving cars Drone warfare
		Culture & technology	Anonymity Social media Health Citizen journalism Viral videos
		Open source and closed source	Open source Closed source Creative Commons
2.1	Algorithms	Computational thinking	Decomposition Top-down diagrams Pattern recognition Abstraction Algorithms
		Pseudocode	Algorithms Pseudocode Precision Keywords Operators & variables Conditionals Loops
		Flowchart	Algorithms Flowcharts Flowchart shapes
		Sorting algorithms	Bubble sort Insertion sort Merge sort
		Searching algorithms	Searching Data sets and criteria Linear search Binary search
2.2	Programming Techniques	Variables etc	Variables Constants Arithmetic operators Boolean operators Assignment operators Compound operators
		Arrays	One dimensional arrays Static arrays Dynamic arrays Iterations Two dimensional arrays Array functions
		Sequence, Selection, Iteration	Sequence Selection Conditionals -IF Conditionals - CASE Iteration WHILE DO FOR
		String Manipulation	Assignment & storage Copy & concatenate Traversal Search Casting
		File Handling	Open Close Write Write loop Read Read loop
		Databases & SQL	Database parts SQL SELECT WHERE WHERE ... AND WHERE ... FOR LIKE
		Data Types	Character & string Integer Real Boolean
		Subprocedure and Functions	Repeating code Subprocedures Functions Code Library
2.3	Producing robust programs	Defensive Design	User interfaces Screen widgets Repeat entry Input boxes Validation Whitelist & blacklist Sanitising Authentication
		Maintainability	Comments Headers Whitespace Indentation
		Errors and correcting algorithms	Logic errors Arithmetic order Syntax errors Debugging tools Run-Time errors
		Testing	Test plan Test data Black box strategy White box strategy Iterative testing Final testing
2.4	Computational Logic	Logic and Truth Tables	What is logic Binary logic Truth tables Logic gates Applying maths is in section 2.2
2.5	Translators and facilities of languages	Levels of language, Translators and IDE	Machine code Assembly code High level language Translators Assemblers Compilers Interpreters IDE
2.6	Data Represenation	Units	Bit, nibble, byte Kilobyte, megabyte, gigabyte Terabye, petabyte
		Binary Numbers	Number systems Digit position Denary to binary Binary to denary Adding binary Binary shift Binary overflow
		Hexadecimal Numbers	Hexadecimal symbols Denary to Hexadecimal Hexadecimal to denary Binary to hexadecimal Hexadecimal to binary Check digits
		Characters	ASCII Extended ASCII Character sets Unicode
		Images	Input devices Pixels Greyscale Colour Colour depth Resolution Metadata
		Sound	Sampling Storing Sampling frequency Sampling bit depth Channels Bit rate Metadata
		Compression	Lossy compression Lossless compression
	NEA	Links to useful resources

OCR 9-1 (J276) GCSE Computer Science

GCSE 9-1 (J276) Computer Science