20 Fetch Decode Execute Cycle FDEC Challenges | A-Level Computer Science

Need real exam-style practice on the Fetch-Decode-Execute cycle and CPU architecture? This video is a concise, exam-focused challenge sprint featuring 20 FDE-themed questions with guided answers—perfect for A-Level Computer Science (OCR) students preparing for Paper 1. As an experienced A-Level Computer Science teacher, I’ll guide you through: 🔹 20 practical challenges on the Fetch-Decode-Execute cycle 🔹 Exam-style questions covering registers, buses, and system architecture 🔹 Questions like “What is the missing register?”, “What is the role of the MAR?”, and “What happens in the decode stage?” 🔹 Walk-through explanations of CPU components and how instructions flow through the FDE cycle 🔹 Ideal for improving your understanding of low-level operations and acing the systems architecture topic Topics covered include: ✔️ Program Counter (PC) ✔️ Memory Address Register (MAR) ✔️ Memory Data Register (MDR) ✔️ Accumulator ✔️ ALU & CU roles ✔️ Buses (Data, Address, Control) ✔️ The stages of the FDE cycle ✔️ The role of registers and instruction sets Perfect for: ✅ Revising the FDE cycle ✅ OCR A-Level Paper 1 prep ✅ Clarifying systems software and CPU fundamentals ✅ In-class or independent study sessions Chapters: 00:00 Challenge Intro 00:38 Challenge 1 01:03 Challenge 2 01:26 Challenge 3 01:45 Challenge 4 02:06 Challenge 5 02:26 Challenge 6 02:45 Challenge 7 03:06 Challenge 8 03:27 Challenge 9 03:47 Challenge 10 04:07 Challenge 11 04:25 Challenge 12 04:43 Challenge 13 05:02 Challenge 14 05:20 Challenge 15 05:39 Challenge 16 05:58 Challenge 17 06:17 Challenge 18 06:36 Challenge 19 06:55 Challenge 20 🎓 More A-Level Computer Science Videos: 📌 http://www.youtube.com/@robincomputerscience 🔥 Want a Part 2 with even more FDE and systems questions? Let me know in the comments! #ALevelComputerScience #FetchDecodeExecute #CPUCycle #ComputerArchitecture #OCRComputerScience #SystemsArchitecture #AlevelRevision #ComputerScienceExplained #CSRevision