Distinguish between virtual memory and primary memory of the computer system. (4 marks)DICT MOD 1 July 2020

Virtual memory and primary memory are two types of memory that are used in a computer system. They have some similarities, but there are also some key differences between them:

1. Purpose: The primary purpose of primary memory (also known as main memory or RAM) is to store data and instructions that are currently being used or accessed by the CPU. Virtual memory, on the other hand, is used to extend the amount of available primary memory by using some of the space on the hard disk as an extension of RAM.
2. Access speed: Primary memory has faster access speeds than virtual memory, as it is directly connected to the CPU. Virtual memory, on the other hand, is stored on the hard disk, which is slower than primary memory.
3. Capacity: Primary memory typically has a smaller capacity than virtual memory, as it is more expensive to manufacture. Virtual memory, on the other hand, can be much larger, as it uses the hard disk as an extension of primary memory.
4. Persistence: Primary memory is volatile, which means that it is wiped clean when the power is turned off. Virtual memory, on the other hand, is persistent, as it is stored on the hard disk and remains intact even when the power is turned off.