LioQing / ICT-Notes

A repository for notes on ICT (HKDSE) things.

DSE ICT Notes

Content is not guaranteed to be 100% correct, anyone is welcome to make pull request/open issue to help fixing mistakes and adding content to this repo.

Content of README

• DSE ICT Notes
  • Content of README
    • Software Development
    • Information Systems
    • Computer System Fundamentals
    • Internet and its Applications
    • Social Implications
    • Concepts

Software Development

• Software Development
  • Compulsory
    • Logical Operations
    • Pseudo Code
    • Flowchart
  • Elective D
  • Programming Languages Generations
    • Generation
    • First Gen - Machine language
    • Second Gen - Assembly language
    • Third Gen - High level programming language
    • Fourth Gen
    • Fifth Gen
  • Programming Paradigm
    • Procedural/Imperative
    • Declarative
      • Logic Programming Language:
      • Query Programming Language:
    • Object-oriented Programming(OOP)
      • Objects and Classes
      • Encapsulation:
      • Inheritance:
      • Polymorphism:
    • Criteria of Selecting a Language for a Specific Program
  • The Generation of Executable Files
    • Program Code Generation
    • Linkers and Loaders
    • Translators
  • System
    • Characteristics
    • Boundary and Environment
    • Interface
    • Subsystem/Processes
    • System Status
    • Information System
    • Developing a New System
    • System Development Life Cycle (SDLC)
    • The Waterfall Model
  • Phases of SDLC and Project Initiation
    • Systems Analysis
      • Identifying users’ requirements
      • Feasibility study
    • Systems Design
    • Systems Implementation
    • Systems Conversion
    • Systems maintenance
    • Systems Documentation

Information Systems

• Information Systems
  • Introduction
    • Input-Process-Output (IPO) Cycle
    • Stored Programs
    • Data vs Information
    • Data Types
    • Components of Information System
    • Information Processes
    • Information Age and Knowledge-based Society
  • Data Organization and Data Control
    • Data Input Error
    • Data Control
    • Error Detection (Extra)
    • Data Verification
    • Data Hierarchy
    • Database Management System (DBMS)
    • File Access Modes
  • Data Representation
    • Number Systems
    • Number Representation in Computer System
    • Addition and Subtraction
    • Character Coding Systems
    • Graphics
    • Audio
    • Video
    • Analogue Data & Digital Data
    • Conversion between Analogue Data & Digital Data
  • Office Automation
    • Application Softwares
    • Data Application
    • Database Management System (DBMS)
    • Task Scheduling Systems
    • Word Processor
    • Text Editing
    • Formatting Text Attributes
    • Page Layout
    • Paragraph Properties
    • Other Features
    • SpreadSheet
    • Functions
    • Data Analysis
    • Database Management System (DBMS)
    • Database Objects
    • Structured Query Language (SQL) in DBMS
    • Answering skills
  • Spreadsheet (Excel) Formula Summary Table
    • Content
    • Operators
      • Arithmetic Operator
      • Comparison Operator
      • Text Operator
    • Functions
      • Statistical Function
      • Mathematical Functions
      • Logical Functions
      • Text, Date and Time Functions
      • Lookup and Reference Functions
    • Syntax between different sheets
  • SQL Summary
    • Content
    • Notice
    • Operators
      • Arithmetic Operator
      • Bitwise Operators
      • Comparison Operators
      • Logic Operators
      • Wildcards
        • LIKE
    • Functions
      • Aggregate Function
      • Arithmetic Function
      • String Function
    • Keyword

Computer System Fundamentals

• Computer System Fundamentals
  • The System Unit of a Computer System
  • The Components of a Computer
  • Central Processing Unit (CPU)
    • Arithmetic and Logic Unit (ALU)
    • Control Unit (CU)
    • Registers
    • System bus (aka bus line)
  • Machine Cycle
  • Measurement of CPU Speed
    • Clock Rate/Clock Frequency
    • Number of Cores
    • Number of Threads
    • Word Length
  • Main Memory
    • Random Access Memory (RAM)
    • Read-Only Memory (ROM)
    • Cache Memory
  • Input and Output Devices
  • Input Devices
    • Keyboards
    • Pointing Devices
    • Scanner
    • Optical Reader
    • Microphone
    • Digital Camera and Digital Video Camera (DC)
  • Output Devices
    • Visual Display Unit (VDU) && Monitor
    • Speakers
    • Printers
    • Multifunction Printers
    • Video Projectors
  • Daily Application
  • Secondary Storage Devices
  • The Speed of a Secondary Storage Device
  • Storage Capacity
  • Categories of Storage Devices
  • Magnetic Storage Devices
  • Optical Storage Devices
  • Others
  • Network Storage
  • System Software and Application Software
  • System Software
  • Operating Systems
  • Utility Program
  • Driver Programs
  • Application Software (aka Integrated Software)
  • Computer Systems
    • Classification of Computers
    • Characteristics of Computer Systems
    • Answering skills

Internet and its Applications

• Internet and its Applications
  • The Networking and Internet Basics
  • Types of network
    • Types of Connections
  • Hardware
  • Network Switching (extra)
  • Multiplexing (extra)
  • Internet Access
  • Communication Software and Protocols
  • Terms for Answering Questions
  • Internet Services and Applications
  • Search Engine
  • Internet Services
  • Streaming Technology
  • Applications
  • HTML
  • Elementary Web Authoring

Social Implications

• Social Implications
  • Equity of Access
  • Work and Health Issues
    • Work Issues
    • Health Issues
  • Intellectual Property (IP)
  • Threats and Security on the Internet

Concepts

• Concepts
  • SSL
  • Public and private keys:
  • Account security:
  • Don't use public computer for important thing:
  • Copyright:
  • DNS:
  • E-mail classified as spam:
  • QR code vs bar code:
  • QR code vs typing URL:
  • QR code usage:
  • Reasons for eye strain using computer:
  • BT program bad:
  • BT program good:
  • Installed antivirus still infected:
  • Illegal activity:
  • Downloaded files with hyperlinks not working: