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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.
Before 1994 there were dissimilar methodologies like Rumbaugh, Booch, Jacobson, and Meyer etc who followed their own notations to mould the systems. The developers were in a di
advantages and disadvantages of layered architecture in computer network.
Q. What do you mean by File? In computer vocabulary, file is a collection of text or data stored on a storage device, such as a Floppy Disk or Hard Disk. If you a fresher to c
What is the use of cache memory? The use of the cache memories solves the memory access problem. In certain, when a cache is included on the same chip as the processor, access
Write a menu-driven program to change a time in seconds to other units (minutes, hours, etc.). The main script will loop to continue until the user chooses to exit. Every time in
What is the transport protocol you use to call a Web service SOAP? Http is preferred for Soap whereas tcp for binary i.e. HTTP is used in web services and tcp works well in rem
What are the Steps include constructing a Functional Model Recognize input and output values Build data flow diagrams which shows functional dependencies Explain
Q. PVM communication model? A nonblocking receive as soon as returns with either data or a flag that data hasn't arrived while a blocking receive returns only when data is in r
The Boolean expression A‾.B + A.B‾ + A.B is equivalent to ? Ans. The Boolean expression A‾ .B + A. B‾+ A.B is equivalent to A + B (A‾ .B + A. B‾+ A.B = B( A‾ + A) + A. B‾ =
HOW WAS JAVA INVENTED?
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