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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.
At a shop of marbles, packs of marbles are prepared. Packets are named A, B, C, D, E …….. All packets are kept in a VERTICAL SHELF in random order. Any numbers of packets with thes
The free subroutine frees a block of memory lastly allocated by the malloc subroutine. Undefined results happen if the Pointer parameter is not a valid pointer. If the Pointer para
Types E-commerce generally based on advertising, selling, marketing and buying, but due to the differences in needs, e-commerce has been classified according to the parties of the
Characteristics of computer storage: Storage technologies at all of levels of the storage hierarchy may be distinguished by evaluating particular core characteristics and alon
Define deadlock? Deadlock is a condition, wherein processes never finish executing and system resources are tied up, preventing another job from beginning. A process requests r
Q. Is tcp Connection-oriented? TCP is connection-oriented. This means a connection is established between source and destination machines before any data is sent it implies tha
Defines a macro Defines a macro with the given name, having as its value the given replacement text. After that (for the rest of the current source file), wherever the preproce
The PVM system supports functional and data decomposition model of parallel programming. It attaches with C, C++, and FORTRAN. The C and C++ language bindings for the PVM user inte
Hashed strings can often be deciphered by 'brute forcing'. Bad news, eh? Yes, and particularly if your encrypted passwords/usernames are floating around in an unprotected file some
Visibility. Controls should be clearly visible, so users can see the controls that are available to them. Visual feedback should also be clearly visible, so users can understand wh
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