You can break a computer system down into four components: main memory, the ALU, the CU and input and output devices
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What is the role of the main memory?
The area in the computer where data is stored that is directly accessible by the CPU
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What is the role of the ALU?
Carries out logical, shift and arithmetic operations
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What is the role of the control unit?
Coordinates all the activities taking place inside the CPU
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What is the role of the clock?
Contols the speed at which instructions and fetched, decoded and executed
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What is the role of the bus?
A collection of wires through which data is transmitted from one component to another
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How does clock speed effect the performance of the CPU?
The greater the clock speed, the faster the instructions will be executed
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How does number of processor cores effect the performance of the CPU?
A PC with a multi-core processor will operate faster when executing many task at the same time
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How does cache size effect the performance of the CPU?
Because the processor has to access main memory less often, it can work faster so the CPU performance increases
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How does cache type effect the performance of the CPU?
The higher the level of cache, the faster the processing speed
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What are the differences between RAM and ROM?
RAM is volatile; ROM is non-volatile. RAM stores the data currently in use; ROM stores the BIOS required at start-up. In RAM memory can be written to and read from; in ROM memory can only be read.
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What is the difference between main memory and secondary storage?
Main memory is volatile; secondary storage is non-volatile. Main memory can be accessed by the processor; secondary storage can't
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Why is secondary storage required?
It is needed to store all the programs on a computer and the operating system as it is non-volatile
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What is cloud storage?
Saving data in an off-site storage system maintained by a third party
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What are the advantages of cloud storage?
You can access the data anywhere; you can share the data easily; backup is thr responibility of the provider
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Other cards in this set
Card 2
Front
What is software?
Back
The programs that control and make use of the hardware
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