Computer science - Techie Mike - The IT guy in Thailand

Binary, Hexadecimal, and Number Systems — Visual Guide for IGCSE CS

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Computer science • 8 min read

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Binary, Hexadecimal, and Number Systems — Visual Guide for IGCSE CS

# Binary, Hexadecimal, and Number Systems — Visual Guide for IGCSE CS Number systems are one of those topics that show up in **every** IGCSE Computer Science exam. Binary to denary. Denary to hex. Binary arithmetic. And I've seen students lose easy marks because they rush the conversions. In this…

Techie Mike • 31 May 2026

Teaching Python File Handling for IGCSE & A-Level CS — Worked Examples

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Python • 6 min read

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Teaching Python File Handling for IGCSE & A-Level CS — Worked Examples

File handling is one of those topics that always shows up on Cambridge CS exams. Whether you're sitting IGCSE 0417 or AS/A-Level 9618, you need to know how to open, read, write, and append data in a file using Python. In this post, I'll walk through everything you need, with the kind of worked examp…

Techie Mike • 29 May 2026

📝 Cambridge AS & A Level Computer Science June 2025 Paper 1 (9618/12) – Databases, Data Structures & Algorithms

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Cambridge-Exams • 3 min read

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📝 Cambridge AS & A Level Computer Science June 2025 Paper 1 (9618/12) – Databases, Data Structures & Algorithms

This is the final part of our complete guide to the June 2025 Paper 1 (9618/12). In this post, we’ll cover:…

Techie Mike • 26 Aug 2025

📝 Cambridge AS & A Level Computer Science June 2025 Paper 2 (9618/22) – Records, Files & Programming Techniques

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Cambridge-Exams • 4 min read

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📝 Cambridge AS & A Level Computer Science June 2025 Paper 2 (9618/22) – Records, Files & Programming Techniques

This is the second part of our complete guide to the June 2025 Paper 2 (9618/22). In this post, we’ll cover:…

Techie Mike • 26 Aug 2025

📝 Cambridge AS & A Level Computer Science June 2025 Paper 2 (9618/22) – Algorithms, Data Structures & Sorting

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Cambridge-Exams • 3 min read

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📝 Cambridge AS & A Level Computer Science June 2025 Paper 2 (9618/22) – Algorithms, Data Structures & Sorting

This is the second part of our complete guide to the June 2025 Paper 2 (9618/22). In this post, we’ll cover:…

Techie Mike • 25 Aug 2025

📝 Cambridge AS & A Level Computer Science June 2025 Paper 2 (9618/22) – Development Life Cycles, Maintenance & Testing

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Cambridge-Exams • 3 min read

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📝 Cambridge AS & A Level Computer Science June 2025 Paper 2 (9618/22) – Development Life Cycles, Maintenance & Testing

This is the first part of our complete guide to the June 2025 Paper 2 (9618/22). In this post, we’ll cover:…

Techie Mike • 23 Aug 2025

📝 Cambridge AS & A Level Computer Science June 2025 Paper 1 (9618/12) – Assembly, Logic Circuits & Communication

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Cambridge-Exams • 3 min read

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📝 Cambridge AS & A Level Computer Science June 2025 Paper 1 (9618/12) – Assembly, Logic Circuits & Communication

This is the second part of our complete guide to the June 2025 Paper 1 (9618/12). In this post, we’ll cover:…

Techie Mike • 23 Aug 2025

📝 Cambridge AS & A Level Computer Science June 2025 Paper 1 (9618/12) – Von Neumann, Number Systems & AI

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Cambridge-Exams • 4 min read

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📝 Cambridge AS & A Level Computer Science June 2025 Paper 1 (9618/12) – Von Neumann, Number Systems & AI

❓ Question 1 – Von Neumann Architecture & Interrupts…

Techie Mike • 22 Aug 2025

Welcome to Techie Mike's Computer Science YouTube Channel — Let's Learn to Code Together

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Computer science • 3 min read

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Welcome to Techie Mike's Computer Science YouTube Channel — Let's Learn to Code Together

# Welcome to Techie Mike's Computer Science YouTube Channel — Let's Learn to Code Together If you've found your way here from my YouTube channel — or you're thinking about subscribing and want to know what this is all about — welcome. I'm Mike, an ICT and Computer Science educator, and I'm passiona…

Techie Mike • 30 Mar 2025