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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 are the ways to create a new form? You can make a new form in any of the following three ways: Using AutoForm: You can make a form based on a single table or query qui
What is an operating system? An operating system is a program that handles the computer hardware. It acts as an intermediate among users of a computer and the computer hardwar
Q. Physical characteristics and access mode of disk drive? Access Time: Access time is time needed between requests made for a read or write operation until the time data are
We might model such a scenario using three types of object: one for Customers, one for BankAccounts and another for Transactions. In terms of data required, for Customers assume we
What are the three data anomalise that are likely to occur as a result of data redundancy?
Q. SPMD model for programming? A normal assumption was that it must be possible and not too hard to capture the SPMD model for programming MIMD computers in data parallel langu
The major task of a computer is to carry out instruction execution. The key questions that can be asked in this respect are: (a) how are the instructions provided to computer? And
CIH, also known as Chernobyl or Spacefiller, is a Microsoft Windows computer virus which first emerged in 1998. It is one of the most damaging viruses, overwriting critical inform
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What are the types of parameters in the function modules? In general, function module can have four types of parameters: EXPORTING : for passing data to the called function
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