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Computer Systems and Architecture
Quick questions on The CPU and fetch-execute cycle explained: O-Level Computing
5short Q&A pairs drawn directly from our worked dot-point answer. For full context and worked exam questions, read the parent dot-point page.
What is clock speed?Show answer
The clock speed measures how many cycles the CPU performs each second, in hertz. A speed of is about billion cycles per second. A higher clock speed means more instructions processed per second, so the computer is faster (other things being equal).
What are cores?Show answer
A core is a processing unit within the CPU that can run its own fetch-execute cycle. A CPU with several cores can work on several instructions or tasks at the same time (in parallel), doing more work overall, especially for software designed to use multiple cores.
What is q1?Show answer
Name the three stages of the fetch-execute cycle. [3 marks]
What is q2?Show answer
State what clock speed measures. [2 marks]
What is q3?Show answer
Explain how more cores can make a computer faster. [2 marks]
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