(g) describe the difference between RAM and ROM
ROM is read only memory, a store for data in a computer that cannot be overwritten and is not lost when it is powered off. RAM is the main memory of a computer which stores data, applications and the operating system while the computer is in use, but loses data when it is powered off.
(h) explain the need for ROM in a computer system
ROM is needed to start up the computer, as the computer just be able to obtain instructions from the moment it is switched on. It is "read-only" meaning it can be read but not adjusted by the user.
(i) describe the purpose of RAM in a computer system
RAM is random access memory, the place in a computer where the operating system, applications and data that are currently in use are stored. This means that they can be quickly reached by the computer processor for better performance.
(j) explain how the amount of RAM in a personal computer affects the performance of the computer
The more RAM that is available to a computer, the more programs and data can be loaded. This enables the computer to perform better.
(k)explain the need for virtual memory
Virtual memory is a section of the hard disk used as if it were RAM to supplement the amount of main memory available, to be used when there is not enough memory available to run programs.
(l) describe cache memory
Cache memory is a high speed memory storing all data that is waiting to be processed.
(m) describe flash memory
Flash memory is solid state memory used in portable device and removable devices to store data. It is a secondary storage with slower access time than RAM.
(n) discuss how changes in memory technologies are leading to innovative computer designs
Advances in processor technologies, solid state drives, mobile internet access etc. are leading to technological convergence between telephones and computers.
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