Explain difference between scanning and parsing, Computer Engineering

Assignment Help:

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.


Related Discussions:- Explain difference between scanning and parsing

Expalin the history of parallel computers, Expalin the History Of Parallel ...

Expalin the History Of Parallel Computers The researches with and implementations of use of the parallelism started long back in the 1950's by IBM Corporation. The IBM STRETCH

What is organizational structure, What is Organizational Structure? A b...

What is Organizational Structure? A business organization may be structured in many dissimilar ways, depending upon the environment within which it handles.  There is always

Phython, super ascii string checker

super ascii string checker

Extract datasets can be used without any kind of errors, The LOOP-ENDLOOP o...

The LOOP-ENDLOOP on extract datasets can be used without any kind of errors False.  It causes runtime errors.

Explain the process of skolemization., Problem 1. Explain briefly the p...

Problem 1. Explain briefly the process of matching production rules against working memory 2. What are the different kinds of knowledge that need to be represented in AI? Ex

How to add a wait state when creating a verification point, 1. Start to mak...

1. Start to make the verification point. 2. In the confirmation Point Name dialog box, select Apply wait state to confirmation point. 3. Type values for the following option

Logic programs, Logic Programs: A subset of first order logic is "Logi...

Logic Programs: A subset of first order logic is "Logic programs". However logic program having a set of Horn clauses that are implication conjectures when there is a conjunct

Describe about general-purpose registers, Q. Describe about general-purpose...

Q. Describe about general-purpose registers? The general-purpose registers as the name proposes can be used for several functions. For illustration they may comprise operands o

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd