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16 Cards in this Set
- Front
- Back
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What are 3 types of memory? |
RAM, ROM and virtual |
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What is RAM? |
Random Access Memory is the main volatile memory in a computer and stores temporary data and instructions currently in use by the CPU. |
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What does volatile memory mean? |
Data is lost when there is no power. |
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What is ROM? |
Read Only Memory stores the boot process and cannot be overwritten as it is programmed at the manufacturer. |
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What is virtual memory? |
Data not required is moved from RAM to the hard disk. |
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What is flash memory? |
A special type of ROM that can be written to by a computer. It is solid state and portable. |
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Give 5 types of storage. |
SSD, HDD, Flash (USB), Optical, Hybrid. Try to avoid magnetic tape |
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What is a hard disk drive and how does it work? |
It uses a stack of magnetic platters that rotate and has a read/wrote head to read the data. They are high capacity at very low cost. |
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What is a solid state drive and how does it work? |
It uses flash memory and there are no moving parts meaning there is no delay in accessing data. This causes lower heat/sound; they're lightweight but have a lower capacity. |
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What is a hybrid drive and how does it work? |
Magnetic capacity storage with frequently accessed data being stored in a solid state device. E.g. CCTV |
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Examples of optical: |
CD ~ CD-ROM ~ CD-R ~ CD-RW |
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What are the typical units of RAM? |
GB and MB |
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When is ROM memory not necessarily read only. |
When it is an EEPROM (very reliable) |
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What happens when RAM is full? |
The computer starts to use secondary storage as virtual RAM. |
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What is flash memory made up of? |
NANS gates / flip flop |
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What are the different types of flash memory? |
NAND and NOR |
