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

How do you turn off cookies for one page in your site, How do you turn off ...

How do you turn off cookies for one page in your site?  Use the Cookie. Discard Property which Gets or sets the discard flag set by the server. When true, this property initiat

The maximum number of dimensions an array can have in c, The maximum number...

The maximum number of dimensions an array can have in C is C permits arrays of three or more dimensions. The exact limit is examined by the compiler.

Ring, Ring This is a easy linear array where the end nodes are connecte...

Ring This is a easy linear array where the end nodes are connected.  It is equivalent to a engage with wrap around connections. The data transmit in a ring is normally one dire

Ldb need not be defined in the abap/4 dictionary, All nodes in the structur...

All nodes in the structure of LDB need not be defined in the ABAP/4 Dictionary False. One has to describe all nodes in the Dictionary or single has to select all nodes that a

Determine the use of loop instruction, Q. Determine the use of LOOP instruc...

Q. Determine the use of LOOP instruction? Program: This program prints the alphabets (A-Z) ; Register used: AX, CX, DX CODE SEGMENT ASSUME: CS: CODE.     MAINP:

What is capacitor-based keyboards, Q. What is Capacitor-Based Keyboards? ...

Q. What is Capacitor-Based Keyboards? These keyboards are based on the idea of Capacitance. A simple capacitor comprises a pair of conductive plates having opposite charges and

How the canvas class and the graphics class are linked, A Canvas object giv...

A Canvas object gives access to a Graphics object by its paint() method.

E brokerage facilitates search & retrieval of information, E Brokerage faci...

E Brokerage facilitates search & retrieval of Information The success factor of a brokerage is its ability to retain existing clients and to enhance their satisfaction by effec

# real life business subsystem, Is production, marketing, personal, materia...

Is production, marketing, personal, material, finance are the real life business subsystems? if yes, then how?

What are difference between latches and flipflops, What are difference betw...

What are difference between latches and flipflops? Difference : Latches are level-sensitive, while, flipflops is edge sensitive. It means to say edge sensitive that O/p change

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