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In a memory hierarchy system, data and programs are first stored in secondary or auxiliary memory. Program and its related data are brought in main memory for execution. What if the size of Memory needed for Program is more than the size of memory? Virtual memory is a idea used in some large computer systems which allow user to construct programs as though a large memory space were available, equal to total of secondary memory. Every address produced by CPU goes through an address mapping from so-called virtual address to a physical address in main memory. Virtual memory is employed to give programmers the illusion that they have a very large memory at their disposal although computer in fact has a relatively small main memory. A Virtual memory system offers a mechanism for translating program-generated addresses in correct main memory locations. This is done dynamically whereas programs are being executed in CPU. The translation or mapping is handled automatically by hardware through a mapping table.
Discuss grade of service. During busy hour, 1500 calls were offered to a group of trunks and 8 calls were lost. The average call duration was 120 seconds. Calculate the traffic off
What do you understand by Electronic Funds Transfer? Electronic Funds Transfer: It's an electronic payment method that transfers the money value from one bank account to
Explain any three policies for process scheduling that uses resource consumption information. All three policies for process scheduling are explained below in brief: 1. Fi
What are the roles of Internet, Intranet and extranet in e-business? Role of Internet, Intranet and extranet into e-business: The given information activities are carried
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