Think of a restaurant kitchen getting orders. First, the waiter fetches the order slip from the counter (gets the instruction from memory). Then, the head chef decodes it - "Table 5 wants pasta" becomes "boil water, cook pasta, add sauce" (Control Unit interprets the instruction). Finally, the sous chefs execute the tasks - actually making the dish (ALU does the work). This cycle repeats billions of times per second - fetch the next order, decode what it means, execute the steps, then immediately fetch the next order!
This introduction covers The Restaurant Order System within Fetch-Decode-Execute Cycle for GCSE Computer Science. Revise Fetch-Decode-Execute Cycle in 3.4 Computer Systems for GCSE Computer Science with 16 exam-style questions and 12 flashcards. This topic appears less often, but it can still be a useful differentiator on mixed-topic papers. It is section 1 of 10 in this topic. Use this introduction to connect the idea to the wider topic before moving on to questions and flashcards.
Practice questions for Fetch-Decode-Execute Cycle
What does FDE stand for in computer science?
Describe the three stages of the FDE cycle.
Quick recall flashcards
What does FDE stand for?
Fetch-Decode-Execute
What are the three stages of the FDE cycle?
Fetch, Decode, Execute (repeats continuously)