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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. Computation step in time complexity of an algorithm? So First in the computation step the local processor executes an arithmetic and logic operation. Afterwards the several
Use of Typewriters for Multiple Copies : Offices frequently require copies of various letters and documents. The simplest method is to make the copies at the same time along with
A museum has a collection of old posters advertising events of various kinds (theatre, sport, fairs, lectures etc.). It wishes to keep a record of these, containing, for each poste
What is the difference between a constant and variable? Explain with example. A C constant is usually just the written version of a number. For example 1, 0, 5.73, 12.5e9. We
Q. What do you mean by Supercomputers? The upper end of state of art mainframe machine is supercomputers. These are among the fastest machines in terms of processing speed and
what is modular system ? list important properties of modular system
What are the various layers of a file system? The file system is composed of lots of dissimilar levels. Each level in the design uses the characteristic of the lower levels to
With respect to security, which one is the better choice?.Net or J2EE? Explain? As per majority programmers .NET is the best one which have one vendor compare to, the ease of
What is an "on input filed" statements? ON INPUT The ABAP/4 module is known as only if a field having the Value other than the initial Value. This initial Value is explain
Layout pages, can describe sections, which can then be overridden by particular views making use of the layout. Major and overriding sections is optional.
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