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- 195 Lessons
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- Notes (Rearranged Version)Notes Arranged In A Different Style For Preparation Ease22
- 1.1Number Systems (Copy)
- 1.2Text, Sound and Images (Copy)
- 1.3Data Storage and File Compression (Copy)
- 1.4Types and Methods of Data Transmission (Copy)
- 1.5Methods of Error Detection (Copy)
- 1.6Symmetric and Asymmetric Encryption (Copy)
- 1.7Computer Architecture (Copy)
- 1.8Input and Output Devices (Copy)
- 1.9Data Storage (Copy)
- 1.10Network Hardware (Copy)
- 1.11Types of Software and Interrupts (Copy)
- 1.12Types of Programming Languages, Translators and Integrated Development Environments (IDEs) (Copy)
- 1.13The Internet and the World Wide Web (WWW) (Copy)
- 1.14Digital Currency (Copy)
- 1.15Cyber Security (Copy)
- 1.16Automated Systems (Copy)
- 1.17Robotics (Copy)
- 1.18Artificial Intelligence (Copy)
- 1.19Paper 1: Pseudocode (Copy)
- 1.20Paper 2: Flowchats (Copy)
- 1.21Paper 2: Databases (Copy)
- 1.22Paper 2: Logic Gates and Truth Table (Copy)
- Cheat SheetsShort, Quick Revision Cheat Sheets125
- 2.1Data Representation: Number Systems: Understand How And Why Computers Use Binary To Represent All Forms Of Data (Copy)
- 2.2Data Representation: Number Systems: Understand The Denary, Binary And Hexadecimal Number Systems (Copy)
- 2.3Data Representation: Number Systems: Convert Between: Positive Denary And Positive Binary (Copy)
- 2.4Data Representation: Number Systems: Convert Between: Positive Denary And Positive Hexadecimal (Copy)
- 2.5Data Representation: Number Systems: Convert Between: Positive Hexadecimal And Positive Binary (Copy)
- 2.6Data Representation: Number Systems: Understand How And Why Hexadecimal Is Used As A Beneficial Method Of Data Representation (Copy)
- 2.7Data Representation: Number Systems: Add Two Positive 8-bit Binary Integers (Copy)
- 2.8Data Representation: Number Systems: Understand The Concept Of Overflow And Why It Occurs In Binary Addition (Copy)
- 2.9Data Representation: Number Systems: Perform A Logical Binary Shift On A Positive 8-bit Binary Integer And Understand The Effect This Has On The Positive Binary Integer (Copy)
- 2.10Data Representation: Number Systems: Use The Two’s Complement Number System To Represent Positive And Negative 8-bit Binary Integers (Copy)
- 2.11Data Representation: Text, Sound And Images: Understand How And Why A Computer Represents Text And The Use Of Character Sets, Including American Standard Code For Information Interchange (Ascii) And Unicode (Copy)
- 2.12Data Representation: Text, Sound And Images: Understand How And Why A Computer Represents Sound, Including The Effects Of The Sample Rate And Sample Resolution (Copy)
- 2.13Data Representation: Text, Sound And Images: Understand How And Why A Computer Represents An Image, Including The Effects Of The Resolution And Colour Depth (Copy)
- 2.14Data Representation: Data Storage And Compression: Understand How Data Storage Is Measured (Copy)
- 2.15Data Representation: Data Storage And Compression: Calculate The File Size Of An Image File And A Sound File, Using Information Given (Copy)
- 2.16Data Representation: Data Storage And Compression: Understand The Purpose Of And Need For Data Compression (Copy)
- 2.17Data Representation: Data Storage And Compression: Understand How Files Are Compressed Using Lossy And Lossless Compression Methods (Copy)
- 2.18Data Transmission: Types And Methods Of Data Transmission: Understand That Data Is Broken Down Into Packets To Be Transmitted (Copy)
- 2.19Data Transmission: Types And Methods Of Data Transmission: Describe The Structure Of A Packet (Copy)
- 2.20Data Transmission: Types And Methods Of Data Transmission: Describe The Process Of Packet Switching (Copy)
- 2.21Data Transmission: Types And Methods Of Data Transmission: Describe How Data Is Transmitted From One Device To Another Using Different Methods Of Data Transmission (Copy)
- 2.22Data Transmission: Types And Methods Of Data Transmission: Explain The Suitability Of Each Method Of Data Transmission, For A Given Scenario (Copy)
- 2.23Data Transmission: Types And Methods Of Data Transmission: Understand The Universal Serial Bus (Usb) Interface And Explain How It Is Used To Transmit Data (Copy)
- 2.24Data Transmission: Methods Of Error Detection: Understand The Need To Check For Errors After Data Transmission And How These Errors Can Occur (Copy)
- 2.25Data Transmission: Methods Of Error Detection: Describe The Processes Involved In Each Of The Following Error Detection Methods For Detecting Errors In Data After Transmission: Parity Check (Odd And Even), Checksum And Echo Check (Copy)
- 2.26Data Transmission: Methods Of Error Detection: Describe How A Check Digit Is Used To Detect Errors In Data Entry And Identify Examples Of When A Check Digit Is Used, Including International Standard Book Numbers (Isbn) And Bar Codes (Copy)
- 2.27Data Transmission: Methods Of Error Detection: Describe How An Automatic Repeat Query (Arq) Can Be Used To Establish That Data Is Received Without Error (Copy)
- 2.28Data Transmission: Encryption: Understand The Need For And Purpose Of Encryption When Transmitting Data (Copy)
- 2.29Data Transmission: Encryption: Understand How Data Is Encrypted Using Symmetric And Asymmetric Encryption (Copy)
- 2.30Hardware: Computer Architecture: Understand The Role Of The Central Processing Unit (Cpu) In A Computer (Copy)
- 2.31Hardware: Computer Architecture: Understand What Is Meant By A Microprocessor (Copy)
- 2.32Hardware: Computer Architecture: Understand The Purpose Of The Components In A Cpu, In A Computer That Has A Von Neumann Architecture (Copy)
- 2.33Hardware: Computer Architecture: Describe The Process Of The Fetch–decode–execute (Fde) Cycle, Including The Role Of Each Component In The Process (Copy)
- 2.34Hardware: Computer Architecture: Understand What Is Meant By A Core, Cache And Clock In A Cpu And Explain How They Can Affect The Performance Of A Cpu (Copy)
- 2.35Hardware: Computer Architecture: Understand The Purpose And Use Of An Instruction Set For A Cpu (Copy)
- 2.36Hardware: Computer Architecture: Describe The Purpose And Characteristics Of An Embedded System And Identify Devices In Which They Are Commonly Used (Copy)
- 2.37Hardware: Input And Output Devices: Understand What Is Meant By An Input Device And Why It Is Required (Copy)
- 2.38Hardware: Input And Output Devices: Understand What Is Meant By An Output Device And Why It Is Required (Copy)
- 2.39Hardware: Input And Output Devices: Understand What Is Meant By A Sensor And The Purposes Of Sensors (Copy)
- 2.40Hardware: Input And Output Devices: Identify The Type Of Data Captured By Each Sensor And Understand When Each Sensor Would Be Used, Including Selecting The Most Suitable Sensor For A Given Context (Copy)
- 2.41Hardware: Data Storage: Understand What Is Meant By Primary Storage (Copy)
- 2.42Hardware: Data Storage: Understand What Is Meant By Secondary Storage (Copy)
- 2.43Hardware: Data Storage: Describe The Operation Of Magnetic, Optical And Solid-state (Flash Memory) Storage And Give Examples Of Each (Copy)
- 2.44Hardware: Data Storage: Describe What Is Meant By Virtual Memory, How It Is Created And Used And Why It Is Necessary (Copy)
- 2.45Hardware: Data Storage: Understand What Is Meant By Cloud Storage (Copy)
- 2.46Hardware: Data Storage: Explain The Advantages And Disadvantages Of Storing Data On The Cloud In Comparison To Storing It Locally (Copy)
- 2.47Hardware: Network Hardware: Understand That A Computer Needs A Network Interface Card (Nic) To Access A Network (Copy)
- 2.48Hardware: Network Hardware: Understand What Is Meant By, And The Purpose Of, A Media Access Control (Mac) Address, Including Its Structure (Copy)
- 2.49Hardware: Network Hardware: Understand What Is Meant By, And The Purpose Of, An Internet Protocol (Ip) Address (Copy)
- 2.50Hardware: Network Hardware: Understand That There Are Different Types Of Ip Address (Copy)
- 2.51Hardware: Network Hardware: Describe The Role Of A Router In A Network (Copy)
- 2.52Software: Types Of Software And Interrupts: Describe The Difference Between System Software And Application Software And Provide Examples Of Each (Copy)
- 2.53Software: Types Of Software And Interrupts: Describe The Role And Basic Functions Of An Operating System (Copy)
- 2.54Software: Types Of Software And Interrupts: Understand How Hardware, Firmware And An Operating System Are Required To Run Applications Software (Copy)
- 2.55Software: Types Of Software And Interrupts: Describe The Role And Operation Of Interrupts (Copy)
- 2.56Software: Types Of Programming Language, Translators And Integrated Development Environments (Ides): Explain What Is Meant By A High-level Language And A Low-level Language, Including The Advantages And Disadvantages Of Each (Copy)
- 2.57Software: Types Of Programming Language, Translators And Integrated Development Environments (Ides): Understand That Assembly Language Is A Form Of Low-level Language That Uses Mnemonics, And That An Assembler Is Needed To Translate An Assembly Language Program Into Machine Code (Copy)
- 2.58Software: Types Of Programming Language, Translators And Integrated Development Environments (Ides): Describe The Operation Of A Compiler And An Interpreter, Including How High-level Language Is Translated By Each And How Errors Are Reported (Copy)
- 2.59Software: Types Of Programming Language, Translators And Integrated Development Environments (Ides): Explain The Advantages And Disadvantages Of A Compiler And An Interpreter (Copy)
- 2.60Software: Types Of Programming Language, Translators And Integrated Development Environments (Ides): Explain The Role Of An Ide In Writing Program Code And The Common Functions Ides Provide (Copy)
- 2.61The Internet And Its Uses: The Internet And The World Wide Web: Understand The Difference Between The Internet And The World Wide Web (Copy)
- 2.62The Internet And Its Uses: The Internet And The World Wide Web: Understand What Is Meant By A Uniform Resource Locator (Url) (Copy)
- 2.63The Internet And Its Uses: The Internet And The World Wide Web: Describe The Purpose And Operation Of Hypertext Transfer Protocol (Http) And Hypertext Transfer Protocol Secure (Https) (Copy)
- 2.64The Internet And Its Uses: The Internet And The World Wide Web: Explain The Purpose And Functions Of A Web Browser (Copy)
- 2.65The Internet And Its Uses: The Internet And The World Wide Web: Describe How Web Pages Are Located, Retrieved And Displayed On A Device When A User Enters A Url (Copy)
- 2.66The Internet And Its Uses: The Internet And The World Wide Web: Explain What Is Meant By Cookies And How They Are Used, Including Session Cookies And Persistent Cookies (Copy)
- 2.67The Internet And Its Uses: Digital Currency: Understand The Concept Of A Digital Currency And How Digital Currencies Are Used (Copy)
- 2.68The Internet And Its Uses: Digital Currency: Understand The Process Of Blockchain And How It Is Used To Track Digital Currency Transactions (Copy)
- 2.69The Internet And Its Uses: Cyber Security: Describe The Processes Involved In, And The Aim Of Carrying Out, A Range Of Cyber Security Threats (Copy)
- 2.70The Internet And Its Uses: Cyber Security: Explain How A Range Of Solutions Are Used To Help Keep Data Safe From Security Threats (Copy)
- 2.71Automated And Emerging Technologies: Automated Systems: Describe How Sensors, Microprocessors And Actuators Can Be Used In Collaboration To Create Automated Systems (Copy)
- 2.72Automated And Emerging Technologies: Automated Systems: Describe The Advantages And Disadvantages Of An Automated System Used For A Given Scenario (Copy)
- 2.73Automated And Emerging Technologies: Robotics: Understand What Is Meant By Robotics (Copy)
- 2.74Automated And Emerging Technologies: Robotics: Describe The Characteristics Of A Robot (Copy)
- 2.75Automated And Emerging Technologies: Robotics: Understand The Roles That Robots Can Perform And Describe The Advantages And Disadvantages Of Their Use (Copy)
- 2.76Automated And Emerging Technologies: Artificial Intelligence: Understand What Is Meant By Artificial Intelligence (Ai) (Copy)
- 2.77Automated And Emerging Technologies: Artificial Intelligence: Describe The Main Characteristics Of Ai As The Collection Of Data And The Rules For Using That Data, The Ability To Reason, And It Can Include The Ability To Learn And Adapt (Copy)
- 2.78Automated And Emerging Technologies: Artificial Intelligence: Explain The Basic Operation And Components Of Ai Systems To Simulate Intelligent Behaviour (Copy)
- 2.79Algorithm Design And Problem-solving: Understand The Program Development Life Cycle, Limited To: Analysis, Design, Coding And Testing (Copy)
- 2.80Algorithm Design And Problem-solving: Understand That Every Computer System Is Made Up Of Sub-systems, Which Are Made Up Of Further Sub-systems (Copy)
- 2.81Algorithm Design And Problem-solving: Understand How A Problem Can Be Decomposed Into Its Component Parts (Copy)
- 2.82Algorithm Design And Problem-solving: Use Different Methods To Design And Construct A Solution To A Problem (Copy)
- 2.83Algorithm Design And Problem-solving: Explain The Purpose Of A Given Algorithm (Copy)
- 2.84Algorithm Design And Problem-solving: Understand Standard Methods Of Solution (Copy)
- 2.85Algorithm Design And Problem-solving: Understand The Need For Validation Checks To Be Made On Input Data And The Different Types Of Validation Check (Copy)
- 2.86Algorithm Design And Problem-solving: Understand The Need For Verification Checks To Be Made On Input Data And The Different Types Of Verification Check (Copy)
- 2.87Algorithm Design And Problem-solving: Suggest And Apply Suitable Test Data (Copy)
- 2.88Algorithm Design And Problem-solving: Complete A Trace Table To Document A Dry-run Of An Algorithm (Copy)
- 2.89Algorithm Design And Problem-solving: Identify Errors In Given Algorithms And Suggest Ways Of Correcting These Errors (Copy)
- 2.90Algorithm Design And Problem-solving: Write And Amend Algorithms For Given Problems Or Scenarios, Using: Pseudocode, Program Code And Flowcharts (Copy)
- 2.91Programming: Programming Concepts: Declare And Use Variables And Constants (Copy)
- 2.92Programming: Programming Concepts: Understand And Use Basic Data Types (Copy)
- 2.93Programming: Programming Concepts: Understand And Use Input And Output (Copy)
- 2.94Programming: Programming Concepts: Understand And Use The Concept Of Sequence (Copy)
- 2.95Programming: Programming Concepts: Understand And Use The Concept Of Selection (Copy)
- 2.96Programming: Programming Concepts: Understand And Use The Concept Of Iteration (Copy)
- 2.97Programming: Programming Concepts: Understand And Use The Concepts Of Totalling And Counting (Copy)
- 2.98Programming: Programming Concepts: Understand And Use The Concept Of String Handling (Copy)
- 2.99Programming: Programming Concepts: Understand And Use Arithmetic, Relational And Logical Operators (Copy)
- 2.100Programming: Programming Concepts: Understand And Use Nested Statements (Copy)
- 2.101Programming: Programming Concepts: Understand What Is Meant By Procedures, Functions And Parameters (Copy)
- 2.102Programming: Programming Concepts: Define And Use Procedures And Functions, With Or Without Parameters (Copy)
- 2.103Programming: Programming Concepts: Understand And Use Local And Global Variables 7 Understand And Use Library Routines (Copy)
- 2.104Programming: Programming Concepts: Understand How To Create A Maintainable Program (Copy)
- 2.105Programming: Arrays: Declare And Use One-dimensional (1d) And Two-dimensional (2d) Arrays (Copy)
- 2.106Programming: Arrays: Understand The Use Of Arrays (Copy)
- 2.107Programming: Arrays: Write Values Into, And Read Values From, An Array Using Iteration (Copy)
- 2.108Programming: File Handling: Understand The Purpose Of Storing Data In A File To Be Used By A Program (Copy)
- 2.109Programming: File Handling: Open, Close And Use A File For Reading And Writing (Copy)
- 2.110Databases: Define A Single-table Database From Given Data Storage Requirements (Copy)
- 2.111Databases: Suggest Suitable Basic Data Types (Copy)
- 2.112Databases: Understand The Purpose Of A Primary Key And Identify A Suitable Primary Key For A Given Database Table (Copy)
- 2.113Databases: Read, Understand And Complete Structured Query Language (Sql) Scripts To Query Data Stored In A Single Database Table (Copy)
- 2.114Boolean Logic: Identify And Use The Standard Symbols For Logic Gates (Copy)
- 2.115Boolean Logic: Define And Understand The Functions Of Logic Gates (Copy)
- 2.116Boolean Logic: Use Logic Gates To Create Given Logic Circuits From A: Problem Statement (Copy)
- 2.117Boolean Logic: Use Logic Gates To Create Given Logic Circuits From A: Logic Expression (Copy)
- 2.118Boolean Logic: Use Logic Gates To Create Given Logic Circuits From A: Truth Table (Copy)
- 2.119Boolean Logic: Complete A Truth Table From A: Problem Statement (Copy)
- 2.120Boolean Logic: Complete A Truth Table From A: Logic Expression (Copy)
- 2.121Boolean Logic: Complete A Truth Table From A: Logic Circuit (Copy)
- 2.122Boolean Logic: Write A Logic Expression From A: Problem Statement (Copy)
- 2.123Boolean Logic: Write A Logic Expression From A: Problem Statement (Copy)
- 2.124Boolean Logic: Write A Logic Expression From A: Logic Circuit (Copy)
- 2.125Boolean Logic: Write A Logic Expression From A: Truth Table (Copy)
- Notes + Written Material For Contents of The Syllabus Version 2Notes for Chapters + Written Resources Regarding The Content Version 224
- 3.1Number Systems (Copy)
- 3.2Text, Sound And Images (Copy)
- 3.3Data Storage And Compression (Copy)
- 3.4Types and Methods of Data Transmission (Copy)
- 3.5Methods of Error Detection (Copy)
- 3.6Encryption (Copy)
- 3.7Computer Architecture (Copy)
- 3.8Input and Output Devices (Copy)
- 3.9Data Storage (Copy)
- 3.10Network Hardware (Copy)
- 3.11Types of Software and Interrupts (Copy)
- 3.12Types of Programming Languages, Translators and Integrated Development Environments (IDEs) (Copy)
- 3.13The Internet and The World Wide Web (Copy)
- 3.14Digital Currency (Copy)
- 3.15Cyber Security (Copy)
- 3.16Automated Systems (Copy)
- 3.17Robotics (Copy)
- 3.18Artificial Intelligence (Copy)
- 3.19Algorithm Design And Problem Solving (Copy)
- 3.20Programming Concepts (Copy)
- 3.21Arrays (Copy)
- 3.22File Handling (Copy)
- 3.23Databases (Copy)
- 3.24Boolean Logic (Copy)
- Cheat SheetsShort, Quick Revision Cheat Sheets24
- 4.1Number Systems (Copy)
- 4.2Text, Sound And Images (Copy)
- 4.3Data Storage And Compression (Copy)
- 4.4Types And Methods of Data Transmission (Copy)
- 4.5Methods of Error Detection (Copy)
- 4.6Encryption (Copy)
- 4.7Computer Architecture (Copy)
- 4.8Input And Output Devices (Copy)
- 4.9Data Storage (Copy)
- 4.10Network Hardware (Copy)
- 4.11Types of Software And Interrupts (Copy)
- 4.12Types of Programming Language, Translators And Integrated Development Environments (IDEs) (Copy)
- 4.13The Internet And The World Wide Web (Copy)
- 4.14Digital Currency (Copy)
- 4.15Cyber Security (Copy)
- 4.16Automated Systems (Copy)
- 4.17Robotics (Copy)
- 4.18Artificial Intelligence (Copy)
- 4.19Algorithm Design And Probem-Solving (Copy)
- 4.20Programming Concepts (Copy)
- 4.21Arrays (Copy)
- 4.22File Handling (Copy)
- 4.23Databases (Copy)
- 4.24Boolean Logic (Copy)
Algorithm Design And Problem-solving: Explain The Purpose Of A Given Algorithm (Copy)
| Aspect | Key Points |
|---|---|
| Algorithm | A step-by-step set of instructions to solve a problem |
| Purpose | Clearly defines how a problem is solved |
| Nature | Logical, ordered, and unambiguous |
| Independence | Not written in a specific programming language |
Written and Compiled By Sir Hunain Zia (AYLOTI), World Record Holder With 154 Total A Grades, 7 Distinctions and 11 World Records For Educate A Change O Level And IGCSE Computer Science Full Scale Course
| Purpose Of An Algorithm | Explanation |
|---|---|
| Problem Solving | Provides a clear method to reach a solution |
| Planning | Helps design a solution before coding |
| Communication | Explains logic to others easily |
| Error Reduction | Finds logical errors early |
| Efficiency | Helps choose the best approach |
Written and Compiled By Sir Hunain Zia (AYLOTI), World Record Holder With 154 Total A Grades, 7 Distinctions and 11 World Records For Educate A Change O Level And IGCSE Computer Science Full Scale Course
| What An Algorithm Describes | Example |
|---|---|
| Input | Data required (e.g. numbers, names) |
| Processing | Calculations or decisions |
| Output | Result produced |
Written and Compiled By Sir Hunain Zia (AYLOTI), World Record Holder With 154 Total A Grades, 7 Distinctions and 11 World Records For Educate A Change O Level And IGCSE Computer Science Full Scale Course
| Example Algorithm Purpose | What It Does |
|---|---|
| Sorting Algorithm | Arranges data in order |
| Search Algorithm | Finds a value in data |
| Login Algorithm | Checks username and password |
| Calculation Algorithm | Computes totals or averages |
Written and Compiled By Sir Hunain Zia (AYLOTI), World Record Holder With 154 Total A Grades, 7 Distinctions and 11 World Records For Educate A Change O Level And IGCSE Computer Science Full Scale Course
| Exam Focus: “Explain The Purpose” | What To Write |
|---|---|
| Main Task | What problem the algorithm solves |
| Input | What data it uses |
| Output | What result it produces |
| Overall Aim | Why the algorithm exists |
Written and Compiled By Sir Hunain Zia (AYLOTI), World Record Holder With 154 Total A Grades, 7 Distinctions and 11 World Records For Educate A Change O Level And IGCSE Computer Science Full Scale Course
| Exam Key Phrases | Use These |
|---|---|
| Algorithm | “Step-by-step solution to a problem” |
| Purpose | “Explains how inputs are processed to produce outputs” |
| Design | “Used to plan a solution before coding” |
| Benefit | “Improves clarity and reduces errors” |
Written and Compiled By Sir Hunain Zia (AYLOTI), World Record Holder With 154 Total A Grades, 7 Distinctions and 11 World Records For Educate A Change O Level And IGCSE Computer Science Full Scale Course