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IB
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A Level
Computer Science
OCR
Revision Notes
OCR A Level Computer Science Revision Notes
Concise resources for the OCR A Level Computer Science course.
1. The Characteristics of Contemporary Processors, Input, Output & Storage Devices
1.1 Structure & Function of the Processor
Components of the CPU
Fetch-Decode-Execute Cycle
CPU Performance
Pipelining
Von Neumann & Harvard Architecture
1.2 Types of Processor
CISC vs RISC
Graphics Processing Unit (GPU)
Multicore & Parallel Processors
1.3 Input, Output & Storage
Input, Output & Storage
RAM & ROM
2. Software & Software Development
2.1 Systems Software
Operating Systems
Memory Management
System Interrupts
Scheduling
Types of Operating System
BIOS
Device Drivers
Virtual Machines
2.2 Applications Generation
Application Software
Utility Software
Open Source & Closed Source Software
Translators
Stages of Compilation
Libraries, Linkers & Loaders
2.3 Software Development
Waterfall Lifecycle
Agile Programming
Spiral Model
Rapid Application Development (RAD)
Comparing Software Development Models
2.4 Types of Programming Language
Programming Paradigms
Procedural Programming
Assembly Language & Little Man Computer
Modes of Addressing
2.5 Object Oriented Languages
Classes (OOP)
Objects (OOP)
Methods (OOP)
Attributes (OOP)
Inheritance (OOP)
Encapsulation (OOP)
Polymorphism (OOP)
3. Exchanging Data
3.1 Compression, Encryption & Hashing
Lossy & Lossless Compression
Run Length Encoding & Dictionary Coding
Symmetric vs Asymmetric Encryption
Hashing
3.2 Databases
Relational Databases
Data Normalisation
Entity Relationship Diagrams
Capturing, Selecting, Managing & Exchanging Data
SQL
Referential Integrity
Transaction Processing
3.3 Networks
Networks
TCP/IP
Domain Name System (DNS)
LAN & WAN
Packet & Circuit Switching
Network Security & Threats
Network Hardware
Client Server & Peer to Peer
3.4 Web Technologies
Search Engine Indexing
PageRank Algorithm
Server Side & Client Side Processing
HTML
CSS
CSS: Styling
JavaScript
Variables & Constants in JavaScript
Outputs in JavaScript
Selection in JavaScript
For Loops in JavaScript
While Loops in JavaScript
Strings in JavaScript
Operators in JavaScript
Nested Statements in JavaScript
Functions & Procedures in JavaScript
4. Data Types, Data Structures & Algorithms
4.1 Data Types
Primitive Data Types
Positive Binary Numbers
Negative Binary Numbers
Binary Addition & Subtraction
Hexadecimal Numbers
Floating Point Binary Numbers
Floating Point Addition & Subtraction
Bitwise Manipulation & Masks
Character Sets
4.2 Data Structures
Arrays
Records, Lists & Tuples
Linked Lists
Stacks
Queues
Graphs
Graphs: Traversing, Adding & Removing Data
Trees
Binary Search Trees
Hash Tables
4.3 Boolean Algebra
Boolean Logic
Karnaugh Maps
Simplifying Boolean Algebra
Flip Flop Circuits
Adder Circuits
5. Legal, Moral, Cultural & Ethical Issues
5.1 Computing Related Legislation
The Data Protection Act 1998
The Computer Misuse Act 1990
The Copyright Design & Patents Act 1988
The Regulation of Investigatory Powers Act 2000
5.2 Moral & Ethical Issues
Artificial Intelligence
Censorship & The Internet
Monitoring Behaviour
Analysing Personal Information
Piracy & Offensive Communications
Layout, Colour Paradigms & Character Sets
Computers in the Workforce
Automated Decision Making
6. Elements of Computational Thinking
6.1 Thinking Abstractly
The Nature of Abstraction
Abstraction & Reality in Computational Thinking
Abstract Models in Computational Thinking
6.2 Thinking Ahead
Computational Thinking: Thinking Ahead
6.3 Thinking Procedurally
Components of a Problem in Computational Thinking
Order of Steps in Problem Solving
Sub-Procedures
6.4 Thinking Logically
Decisions in Computational Thinking
Logical Conditions in Computational Thinking
6.5 Thinking Concurrently
Concurrency in Problem Solving
Concurrent Processing
7. Problem Solving & Programming
7.1 Programming Techniques
Data Types
Arithmetic, Logical & Boolean Operators
Programming Constructs
Selection
Iteration
Modularity, Functions & Procedures
Parameter Passing
Recursion
Global & Local Variables
Integrated Development Environment (IDE)
Programming Classes, Objects, Methods & Attributes
Programming Inheritance
Programming Encapsulation
Programming Polymorphism
7.2 Computational Methods
Computational Methods
Problem Recognition
Problem Decomposition
Divide & Conquer Algorithms
Use of Abstraction
Backtracking Algorithms
Heuristics for Problem Solving
Performance Modelling
Pipelining as a Computational Method
Visualisation for Problem Solving
8. Algorithms
8.1 Algorithms
Suitability of Algorithms
Big O Notation
Binary Search
Linear Search
Bubble Sort
Insertion Sort
Merge Sort
Quick Sort
Dijkstra's Shortest Path Algorithm
A* Algorithm
8.2 Algorithms for the Main Data Structures
Stacks
Queues
Linked Lists
Trees
Study tools
OCR A Level Computer Science · Exam Questions
OCR A Level Computer Science · Past Papers
Related links
A Level Computer Science · Revision Notes
A Level Computer Science · Exam Questions
A Level Computer Science · Past Papers