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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.
Q. Explain about disk caching scheme? The disk caching scheme can be used to speed up performance of disk drive system. A set (cache) of buffers is assigned to hold some disk b
What is the need of interrupt controller? The interrupt controller is employed to expand the interrupt inputs. It can handle the interrupt requests from several devices and pe
Which loader is executed when a system is first turned on or restarted? Ans. Bootstrap loader executed while a system is first turned on or restarted.
Q. How many instructions in a Computer? A computer can have a vast number of instructions and addressing modes. Older computers with the growth of Integrated circuit technolog
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Discuss anout variables and assignment statements in ruby
Define Software is in machine language or not Software is in machine language, today it is often developed by first writing in a high-level language or an assembly language or
Q. Illustrate program on hypothetical machine? The program given in figure above is a hypothetical program which performs addition of numbers stored from locations 2001 onwards
First-Order Models: Here if we proposed first-order logic as a good knowledge representation language than propositional logic is just because there is more expressive than we
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