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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.
Enumerate in detail about Image Scanners Drawings, graphs, colour and black-and-white photos, or text can be stored for computer processing with an image scanner by passing an
Ending transactions: Either side may request that a burst end after the present data phase. Simple PCI component that do not support multi-word bursts will always request this
In RDBMS, what is the efficient data structure used in the internal storage representation? B+ tree. Because in B+ tree, all the data is kept only in leaf nodes, that makes sea
Q. Explain Bus Interface Unit? BIU (Bus Interface Unit) mainly interacts with system bus. It executes nearly all the activities relating to fetch cycle like: Computing
Describe the various characteristics of UDP protocol. The characteristics of the UDP are as follows: End to end: UDP is transport protocols that can distinguish between
The number and nature of registers is a major factor which distinguishes among computers. For illustration, Intel Pentium has about 32 registers. A number of these registers are sp
Explain in detail about the Random Scan Display This device using CRT directs the electron beam only to the parts of the screen where a picture is to be drawn. This kind of d
Graphics adapters: Video card converts digital output from computer into an analog video signal and transmits the signal through a cable to monitor also known as a graphics ca
What is hysteresis? Hysteresis is well known in ferromagnetic materials. When an external magnetic field is applied to a Ferro magnet, the atomic dipoles align themselves with
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
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