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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.
With its newer range of PCs IBM introduced 101-key Enhanced/Advanced keyboard. This keyboard is fundamental keyboard behind modern QWERTY keyboards. This has function keys aligned
Existential Introduction: Now if we have any sentence as, A, and variable, v, that does not occur in A, so then for any ground term, g, such occurs in A, than we can turn A in
Explain network security. Network security means the security of networks and their services from unauthorized access, changes, destruction or disclosure. It gives for assuranc
For the one who still has no idea about the BIOS on your PC, notice when you first turn on your PC or laptop a few screens pop up. It may be a logo such as DELL or HP or ASUS, Tyan
What are the different modes in that 8255 Programmable Peripheral Interface (PPI) can operate? 24 I/O lines in 3-8-bit port groups - A, B, C A, B can be 8-bit input
Explain Tri-state logic inverter with the help of a circuit diagram. Give its Truth Table. Ans: Tri-state Logic Inverter: The functional diagram of Tri-state Logic Inve
Q. How to make frames for web documents? Intelligent use of frames can give your pages a cleaner look and make easier to navigate. The fundamental concept goes like this: Every
Q. In PRAM model steps required for executing an algorithm? Subsequent steps are performed by a PRAM model whenever executing an algorithm: i) Read phase: First the N proc
What is an expression tree? How an expression is evaluated using an expression tree? Algebraic expressions is as given here a/b+(c-d)e That has an inherent tree-like structure
Define Parsing Parsing is the method of analyzing a text, made up of a sequence of tokens, to define its grammatical structure with respect to a given formal grammar. Parsing
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