2.5.1
High-Level Languages
Most computer languages are written in high-level programming languages.
High-Level Languages
- High-level languages (HLLs) include most programming languages such as Python, C++ and Java.
- High-level languages are made of human-readable statements that make it easier for us to program.
- High-level languages are portable, which means that they can be run on many different types of hardware.
What does a HLL look like?
- Commands in a high-level language look very like English. For example:
- print()
- SELECT * FROM users;
Why don't we always use HLLs?
- Computers can only process instructions in the form of binary numbers.
- We use special software called a translator to convert our HLL source code into an executable binary file.
Low-Level Languages
Low-level programming languages are languages which are much closer to computer-understandable binary.
Low-Level Languages
- Low-level languages (LLLs) are much closer to executable machine code than high-level languages.
- LLLs are harder to read by humans, but are easier to read for the computer.
What does a LLL look like?
- LLL commands are not easy to read, and might include commands such as:
- MOV ax, bx
- CMP ch, dh
- CLI
Why do we use LLLs?
- LLLs provide exact control over the central processing unit.
- LLLs need less translation, and often lead to faster code which is useful for computers with low specifications such as embedded systems.
1Computer Systems
1.1Systems Architecture
1.2Memory & Storage
1.2.1Types of Memory
1.2.2Flash Memory
1.2.3Virtual Memory
1.2.4Exam-Style Questions - Primary Memory
1.2.5Capacity
1.2.6Solid State Storage
1.2.7Magnetic Storage
1.2.8Examples of Magnetic Storage
1.2.9Optical Storage & its Properties
1.2.10Examples of Optical Storage
1.2.11End of Topic Test - Computer Systems
1.2.12Grade 9 - Storage
1.2.13Exam-Style Questions - Storage
1.2.14Units of Information
1.2.15Number Bases
1.2.16Converting Number Bases
1.2.17Hexadecimal
1.2.18Binary Arithmetic
1.2.19Representing Text
1.2.20ASCII & Unicode
1.2.21Representing Images
1.2.22Representing Sound
1.2.23Data Compression
1.2.24End of Topic Test - Representation
1.2.25Exam-Style Questions -Data Conversions
1.3Computer Networks, Connections & Protocols
1.3.1Benefit of Networks
1.3.2Network Performance
1.3.3Networks: How Do Packets Get Routed?
1.3.4Types of Networks
1.3.5Client-Server Model
1.3.6Pros & Cons of Client-Server Model
1.3.7Peer-to-Peer Model
1.3.8Pros & Cons of Peer-to-Peer Model
1.3.9Network Hardware
1.3.10What is the Internet?
1.3.11URLs
1.3.12DNS & Web Hosting
1.3.13The Cloud
1.3.14Pros & Cons of the Cloud
1.3.15Exam-Style Questions - Networking Models
1.3.16Topology
1.3.17WiFi
1.3.18WiFi Encryption
1.3.19IP Addresses
1.3.20MAC Addresses
1.3.21Network Protocols
1.3.22Application Protocols
1.3.23Layers
1.3.24Advantages of Layering
1.3.25Exam-Style Questions - Network Protocols
1.4Network Security
1.5Systems Software
1.6Ethical, Legal, Cultural & Environmental Concern
1.6.1Open Source vs Proprietary Software
1.6.2Licensing Issues
1.6.3Ethical Issues
1.6.4Ethical Issues 2
1.6.5Exam-Style Questions - Ethical Issues
1.6.6Legal Issues
1.6.7Legal Issues 2
1.6.8Freedom of Information Act (2000)
1.6.9Cultural Issues
1.6.10Environmental Issues
1.6.11Positive Environmental Impact
1.6.12Privacy Issues
1.6.13Stakeholders
1.6.14End of Topic Test - Software & Issues
2Computational Thinking, Algorithms and Programming
2.1Algorithms
2.1.1Computational Thinking
2.1.2Algorithmic Thinking
2.1.3Pseudocode & Flow Diagrams
2.1.4Interpreting & Correcting Algorithm
2.1.5Completing Algorithms
2.1.6Search Algorithms
2.1.7Binary Search
2.1.8Overview of Sort Algorithms
2.1.9Bubble Sort & Insertion Sort
2.1.10Merge Sort
2.1.11Exam-Style Questions - Sorting Algorithms
2.2Programming Fundamentals
2.3Producing Robust Programs
2.4Boolean Logic
Jump to other topics
1Computer Systems
1.1Systems Architecture
1.2Memory & Storage
1.2.1Types of Memory
1.2.2Flash Memory
1.2.3Virtual Memory
1.2.4Exam-Style Questions - Primary Memory
1.2.5Capacity
1.2.6Solid State Storage
1.2.7Magnetic Storage
1.2.8Examples of Magnetic Storage
1.2.9Optical Storage & its Properties
1.2.10Examples of Optical Storage
1.2.11End of Topic Test - Computer Systems
1.2.12Grade 9 - Storage
1.2.13Exam-Style Questions - Storage
1.2.14Units of Information
1.2.15Number Bases
1.2.16Converting Number Bases
1.2.17Hexadecimal
1.2.18Binary Arithmetic
1.2.19Representing Text
1.2.20ASCII & Unicode
1.2.21Representing Images
1.2.22Representing Sound
1.2.23Data Compression
1.2.24End of Topic Test - Representation
1.2.25Exam-Style Questions -Data Conversions
1.3Computer Networks, Connections & Protocols
1.3.1Benefit of Networks
1.3.2Network Performance
1.3.3Networks: How Do Packets Get Routed?
1.3.4Types of Networks
1.3.5Client-Server Model
1.3.6Pros & Cons of Client-Server Model
1.3.7Peer-to-Peer Model
1.3.8Pros & Cons of Peer-to-Peer Model
1.3.9Network Hardware
1.3.10What is the Internet?
1.3.11URLs
1.3.12DNS & Web Hosting
1.3.13The Cloud
1.3.14Pros & Cons of the Cloud
1.3.15Exam-Style Questions - Networking Models
1.3.16Topology
1.3.17WiFi
1.3.18WiFi Encryption
1.3.19IP Addresses
1.3.20MAC Addresses
1.3.21Network Protocols
1.3.22Application Protocols
1.3.23Layers
1.3.24Advantages of Layering
1.3.25Exam-Style Questions - Network Protocols
1.4Network Security
1.5Systems Software
1.6Ethical, Legal, Cultural & Environmental Concern
1.6.1Open Source vs Proprietary Software
1.6.2Licensing Issues
1.6.3Ethical Issues
1.6.4Ethical Issues 2
1.6.5Exam-Style Questions - Ethical Issues
1.6.6Legal Issues
1.6.7Legal Issues 2
1.6.8Freedom of Information Act (2000)
1.6.9Cultural Issues
1.6.10Environmental Issues
1.6.11Positive Environmental Impact
1.6.12Privacy Issues
1.6.13Stakeholders
1.6.14End of Topic Test - Software & Issues
2Computational Thinking, Algorithms and Programming
2.1Algorithms
2.1.1Computational Thinking
2.1.2Algorithmic Thinking
2.1.3Pseudocode & Flow Diagrams
2.1.4Interpreting & Correcting Algorithm
2.1.5Completing Algorithms
2.1.6Search Algorithms
2.1.7Binary Search
2.1.8Overview of Sort Algorithms
2.1.9Bubble Sort & Insertion Sort
2.1.10Merge Sort
2.1.11Exam-Style Questions - Sorting Algorithms
2.2Programming Fundamentals
2.3Producing Robust Programs
2.4Boolean Logic
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