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

Define security protocols used for e-commerce applications, Define various ...

Define various security protocols used for e-commerce applications. The e-commerce systems of today are composed of very many components as like: a commerce server, client soft

Er diagrams, how can I draw er diagram for sell & storage section of a drug...

how can I draw er diagram for sell & storage section of a drugstore?

What is branch target, What is branch target? As a result of branch ins...

What is branch target? As a result of branch instruction, the processor fetches and implements the instruction at a new address called as branch target, instead of the instruct

What is python?, Python is an interpreter, interactive, object-oriented pro...

Python is an interpreter, interactive, object-oriented programming language. It is frequently compared to Tcl, P e r l, Scheme or Java. Python combines remarkable power with v

Create simple algebraic expression from k-map, Q. Create simple algebraic e...

Q. Create simple algebraic expression from K-Map? Now create simple algebraic expression from K-Map. These expressions are created by employing adjacency if we have 2 adjacent

What is throughput?, If the throughput scales upward as time progresses and...

If the throughput scales upward as time progresses and the number of Vusers enhance, this showing that the bandwidth is sufficient. If the graph were to remain relatively flat as t

Adbms, what are the different way of executing pipelines

what are the different way of executing pipelines

What is block started by symbol, What is BSS(Block Started by Symbol)? ...

What is BSS(Block Started by Symbol)? A data showing at the machine level, that has initial values when a program begins and tells about how much space the kernel assigns for t

Differentiate between sequential access and direct access, Question: (a...

Question: (a) Briefly explain how the functionality of the WWW has been enhanced, after its birth at CERN site. Use examples to illustrate your answer. (b) Many modern com

Write policy of cache memory, Q. Write Policy of cache memory? If conte...

Q. Write Policy of cache memory? If contents of a block in cache are changed then it's essential to write it back to main memory before replacing it. Write policy determines wh

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