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The need for virtual memory questions

Q1. What is 'memory' in a computer system more properly known as?
Q2. What is the unit of storage used for RAM and hard drives?
Q3. What limits how much RAM you can have in a computer system?
Q4. What is the hard drive used for in computers?
Q5. What is meant by ‘virtual memory’?
Q6. What is a Windows 'swap file'?
Q7. Explain how virtual memory works.
Q8. Which works faster, RAM or a hard drive?
Q9. Explain what ‘disk threshing’ is and why it is a potential problem. 
Q10. How much extra space can disk threshing produce without reducing performance too much?

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