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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.
what is the usuage of Real time Os
In general what are the two ways in which one can retrieve data from tables? Using Select statements, Database Program.
Q. Implementation of a Simple Arithmetic? So, by now we have concerned how logic and arithmetic micro-operations can be applied individually. If we combine these 2 circuits alo
what is the work of pin daigram in 8086 microprocessor in assembly
What is Operational Research?
What are RDRAM? RDRAM are Rambus DRAM. Rambus needs specially designed memory chips. These chips use cell arrays based on the standard DRAM technology. Multiple banks of cell a
A dialog box such as a File menu that have one command until it is clicked when a number of dissimilar commands "drop-down."
What do you mean by system calls? System calls give the interface among a process and the operating system. When a system call is executed, it is treated as by the hardware as
How many words can be acquired by arranging the letters of the word 'UNIVERSAL' in different way? In how many of them (i) E, R, S takes place together (ii) No two of the
what is cascading rolback?
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