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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 differences between Internal and external fragmentation. Internal and external fragmentation (1) While memory allocated to a process is a little larger than th
Harvard mark i and the bug The next important effort towards devising an electromechanical computer was done at the harvard University, jointly sponsored by the Department of U
An exchange uses a -40 V battery to drive subscriber lines. A resistance of 250 ohms is placed in series with the battery to protect it from short circuits. The subscribers are req
Using defparam Parameter values can be changed in any module instance in the design with keyword defparam. Hierarchical name of the module instance can be used to override para
33.A juice company manufactures one-gallon bottles of three types of juice blends using orange, pineapple, and mango juice. The blends have the following compositions: 1 gallon or
WAR (write after read) - Data hazards in computer architecture: WAR (write after read) - j tries to write at destination before it is read by i , hence i wrongly gets the n
What is meant by a priority encoder? Ans: Priority encoder- Basically an encoder is a combinational circuit which performs the inverse operation of a decoder. The input c
Give detail explanation about Arithmetic Micro-operations These micro-operations perform some essential arithmetic operations on numeric data stored in the registers. These bas
Three state table buffers Three state table buffers: A bus system can be constructed with the help of three state gates instead of multiplexers. A three states gate is digital
What is a work process? A work process is where individual dialog steps are in fact processed and the work is done. Every work process ocuurs one type of request.
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