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AQA A LEVEL GCSE Computer Science | 2022 UPDATE QUESTIONS ONLY
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  • Course
  • COMPUTER SCIENCE
  • Institution
  • AQA

Computer systems CPU 1) The CPU (Central Processing Unit) is the main component in a computer for processing data and instructions. It could be considered as the computing equivalent of the human brain. It is a hardware device that is made up of many sub components: 2)  controller  ALU...

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  • February 4, 2022
  • 11
  • 2021/2022
  • Exam (elaborations)
  • Questions & answers

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  • computer systems cpu 1 the cpu central processing unit is the main component in a computer for processing data and instructions it could be considered as the computing equivalent of the human brai

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  • AQA
  • COMPUTER SCIENCE
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GCSE Computer
Science
Mark scheme for questions that haven’t appeared in
the SAM (V2), or Past Paper 2014 or 2015




1

, I. Computer systems
CPU

ALU

registers
controlle
internal r
memor
y




1) The CPU (Central Processing Unit) is the main component in a computer for processing
data and instructions. It could be considered as the computing equivalent of the human
brain. It is a hardware device that is made up of many sub components:
2)
 controller
 ALU: arithmetic/logic unit
 registers
 internal memory
 buses



3) This is where data is stored when it is not being actively used, usually for retrieval at a later
date. These are discussed in further detail on pages 15 and 16.

4) When data is saved or loaded from memory, the address at which it is to be stored or
loaded from must be sent. The storage address of data always travels along an address
bus.

5) Data will then need to be moved between several parts of a computer. The path along
which data travels is called a data bus.

6) In computer hardware, a port serves as an interface between the computer and other
computers or devices. Physically, it is a piece of equipment to which a plug or cable
connects.

7)




HDMI USB USB audio in audio out




2

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