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 is the bios full form, BIOS - Basic Input Output System, Power On ...

BIOS - Basic Input Output System, Power On Self Test (POST) and Loading Bootloader from the Hard disk drive Boot Sector is being completed by BIOS. It started the system for

What are different normalization forms, What are different normalization fo...

What are different normalization forms? 1NF: Eliminate Repeating Groups Make a separate table for every set of related attributes, and give each table a primary key. Each fie

Asp.net, how work for asp.net

how work for asp.net

Explain about flip-flops, Explain about Flip-Flops  Flip-Flops are also...

Explain about Flip-Flops  Flip-Flops are also called bistable multivibrator.  A flip-flop is capable of storing 1 bit of binary data.  It has two stable states- 'one' and 'zero

Why we need linker, Q. Why we need linker?  The linker: Joins as...

Q. Why we need linker?  The linker: Joins assembled module in one executable program, Produces an .EXE module and initializes with special instructions to facilitate

Explain what is high debugging?, It is helped to recure the bugs. A program...

It is helped to recure the bugs. A program has problem that time this debugging is helped to solve the bugs is simply, this is the method of the recure bugs in the programming lang

Configure port to send logic, Configure port A for the lower 4 bits to be i...

Configure port A for the lower 4 bits to be inputs and the upper 4 bits to be outputs. The program should chase a logic one from Pa4 -> Pa7, depending upon the condition of Pa0-Pa3

Define signal and component of obejct oriented modeling, Define about sign...

Define about signal and component of obejct oriented modeling A signal is a specification of an asynchronous stimulus communicated among instances. A component is a physical

Adding xml files to your page, Step 1: Choose File -> Import XML into Templ...

Step 1: Choose File -> Import XML into Template Step 2: Select the XML file & click Open When an XML file is imported, Dreamweaver merges XML content in Template, which is be

What are the requirements a dialog program must fulfill, What are the requi...

What are the requirements a dialog program must fulfill? A dialog program must fulfil the following requirements A user friendly user interface. - Format and consistency

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