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Explain difference between Scanning and parsing.
Scanning and parsing: Scanning process is the process of recognizing the lexical components in a source string whereas parsing is the process of checking the validity of a source string, and to find out its syntactic structure. The purpose for separating scanning from parsing is that the lexical characteristics of a language can be specified by using Type-3 grammars. All Type-3 production identifies lexical components is also a Type-2 production. Conversely, a recognizer for Type-3 productions is easier, simple to build and more efficient throughout execution than a recognizer for Type-2 productions. Therefore it is better to handle the lexical and syntactic elements of a source language separately.
Efficiency The effectiveness of pipeline can be measured the same as the ratio of busy time span to total time span counting the idle time. Let c be clock period of a pipeline
Q. Illustrate about FAT structure? DOS file system maintains a table of pointers known as FAT (File allocation table) that comprises an array of 16-bit values. There is one ent
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Contain all the cells that your UDF depends on in the argument list. Or enter this as the first statement in your Function: Application.Volatile This will cause the functi
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Name the switching schemes used in a digital exchange? The several switching systems used are: 1. Strowger Switching System 2. Cross bar Switching. 3. Electronic Swit
Artificial intelligence ( AL) is a field of science and technology based on disciplines such as computer science biology psychology linguistics mathematics and engineering. The g
What are the various mechanisms for implementing I/O operations? a) Program controlled I/O b) Interrupts c) DMA
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