1. OCR GCSE (J277) 1.1 The purpose of the CPU - The fetch-execute cycle
Craig'n'Dave・2 minutes read
A computer system operates through a fetch-execute cycle, with the CPU fetching, decoding, and executing instructions continuously. The main components are memory for storing programs and the CPU for executing instructions at a speed determined by its clock speed in hertz.
Insights
- The central processing unit (CPU) is the core component of a computer system responsible for executing instructions fetched from memory, highlighting its crucial role in processing data through repetitive fetch-execute cycles.
- Clock speed, measured in hertz, dictates the CPU's processing capacity by determining the number of cycles it can execute per second, emphasizing the significance of this metric in assessing a computer system's performance and efficiency.
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Recent questions
What is the fetch-execute cycle in a computer system?
The fetch-execute cycle involves the CPU fetching, decoding, and executing instructions.
What are the main components of a computer system?
The main components are memory and the CPU.
What does the CPU do in a computer system?
The CPU carries out instructions like calculations and data retrieval.
How does the clock speed of a CPU affect its performance?
The clock speed determines the number of cycles per second.
Why is the fetch-execute cycle important in computer systems?
The cycle allows the CPU to continuously process instructions.
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