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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.
Explain the significance of different fields of an instruction An instruction is a command given to a computer to perform a particular operation on some given data and the form
Address translation: Compiler time : If it is known in advance that a program will reside at a particular location of primary memory, and then the compiler can be told to
The field SY-STEPL refers to The index of the screen table row that is presently being processed. The system variable SY-stepl only has a meaning within the confines of LOOP.
Describe the Assume - Assembler directives ASSUME: This directive would be used to map the segment register names with memory addresses. Syntax is as below: ASSUME SS:
pls give the list of adaptive mechanism in artificial immune system
C provides a wide range of variable types. Normal 0 false false false EN-IN X-NONE X-NONE MicrosoftInternetExplorer4
Using D-Flip flops and waveforms explain the working of a 4-bit SISO shift register. Ans. Serial In-Serail Out Shift Register: Fig.(a) demonstrates a 4 bit serial in-serial out
Units of artificial neural networks: However the input units simply output the value that was input to them from the example to be propagated. So every other unit in a network
Generally the register storage is faster than cache andmain memory. Also register addressing uses much shorter addresses than addresses for cache and main memory. Though the number
Write Relational algebra expressions for the given queries. (i) List the employee numbers, employee names and their manager numbers working in several branches who earn more than
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