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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.
Define word length? Every group of n bits is referred to as a word of information and n is known as the word length.
List the steps needed to perform page replacement. The steps required to perform page replacement are: 1. Find out which page is to be removed from the memory. 2. Perfor
Rectifier output with fitters: When half-wave and full-wave rectification suffice to deliver a type of DC output, neither produces constant-voltage DC (direct current). To gen
Yes, single thread module
Micro-Operations A micro-operation is an basic operation which is performed on data stored in registers. We can classify micro-operations into four categories: 1. Register t
Explain Register marker. Register marker: Strowger selectors doing searching and counting. Conversely, the crossbar switch has no 'intelligence'. Something external to the
Write short note on the Johnson counter. Ans: Johnson Counter: It is a synchronous counter, where all flip-flops are clocked concurrently and the clock pulses drive the
A UNIX device driver is ? Ans. A UNIX device driver is structured in two halves termed as top half and bottom half.
Rule in a single direction - equivalences rules: Hence there the power to replace sub expressions always allows use to prove theorems with equivalences: as given in the above
What is commitment unit? When out-of-order execution is permitted, a special control unit is required to guarantee in-order commitment. This is known as the commitment unit. It
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