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

What are cosmic rays, Q. What are cosmic rays? The ionising radiation s...

Q. What are cosmic rays? The ionising radiation several times stronger than γ-rays entering the earth from all the directions from cosmic or interstellar space is known as cosm

How do you traverse a btree in backward in-order, Put the node in the right...

Put the node in the right subtree Then, Put the root  Put the node in the left subtree

What is the linkage section, The linkage section is part of a known as prog...

The linkage section is part of a known as program that 'links' or maps to data items in the calling program are working storage. It is the part of the called program where these sh

What technology used by magento, Magento uses PHP as a web server scripting...

Magento uses PHP as a web server scripting language and the MySQL Database. The data model is based on the Entity-attribute-value model that stores data objects in tree structures,

Define instruction code, Define Instruction Code. An Instruction code i...

Define Instruction Code. An Instruction code is a group of bits that instructs the computer to perform an exact operation. It is usually separated into parts, each having its o

Nanoprogramming - computer architecture, Nanoprogramming:  Second c...

Nanoprogramming:  Second compromise: nanoprogramming  it use a 2-level control storage organization  Top level is a vertical format memory  Output of the top level

Explain automated and manual systems, Q. Explain Automated and Manual syste...

Q. Explain Automated and Manual systems? Automated and Manual systems: The system that doesn't need human intervention is known as'Automated system'. In this system whole proce

What is a data class, What is a Data Class? The Data class verifies in ...

What is a Data Class? The Data class verifies in which table space the table is stored when it is formed in the database

Name of current gui status is there, In which system field does the name of...

In which system field does the name of current gui status is there? The name of the present GUI STATUS is available in the system field SY-PFKEY.

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