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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.
Write-through vs. write-back caches
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File History.d1 contains a brief history of computing. There are no indentations in this file. Write a program to read this file, inserting five blank spaces at the beginning of ea
Before 1994 there were dissimilar methodologies like Rumbaugh, Booch, Jacobson, and Meyer etc who followed their own notations to mould the systems. The developers were in a di
? Object: The interaction among objects takes place in a system. An object is depicted by a rectangle with the name of the object, preceded by a colon and underline. ? Relation
What are the techniques of Data Collection It can be either automatic or manual. Manual techniques can include: - Keypads/Keyboards to type in data - touch screens to s
What is an "on request Field" statement? ON REQUEST The ABAP/4 Module is known as only if the user has entered the value in the field value as the last screen display .Th
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a) Input names of students from the user, terminated by "ZZZ", 0, 0, 0 and create a data file grades with records of the following form: Student (string), test1 (integer), test2 (i
Explain the DAA DAA instruction follows the ADC or ADD instruction to adjust the result into a BCD result. DAA instruction functions only with the AL register, this addition sh
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