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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 term - ancestors The ancestors of modern age computer were mechanical and electro-mechanical instruments. This ancestry can be traced as back and seventeenth centur
Q. Graphic symbol of S-R flip-flop? R-S Flip flop - Graphic symbol of S-R flip-flop is displayed in Fig below. It has 3 inputs S (set), R (reset) and C (for clock). Q(t+1) is
Hubs are present in the network To interconnect the LAN with WANs.
what is critical section problem in operating system with diagram
World Wide Web (WWW) began as a text-only medium. First version doesn't even have the capability to include graphics on a page. Today's Web sites include sound animation, graphics,
Q.Joint Application Development session leader? JAD session leader: JAD leader organizes and runs the JAD. This person is trained in group management and facilitation as well
In this stage of the project you are required to create a Design document, the Design document must contain the following: Structure chart Pseudo-code Data Dictionary
Question: (a) Describe the differences between a URI, a URN and a URL. (b) What are the five basic syntax rules for a well-formed XML document? (c) Provide four uses of
You were offered bonus marks for separating the user interface code from the main logic of your program. This design choice makes it very easy to replace the user interface without
Classify computer systems according to capacity. How they are different from computers according to the classification of technology. Provide comparative study also.
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