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

Features added in message passing interface-2, Q. Show the Features added i...

Q. Show the Features added in message passing interface-2 Input/output Single-sided operations for remote memory access Binding for C++ Dynamic process managem

Risks by merchant perspective in electronic payment system, What are the ri...

What are the risks by merchant's perspective in Electronic Payment Systems? Through merchant's perspective: • Copied or Forged payment instruments • Insufficient funds in

Describe menu in dreamweaver, File Menu: Under it there are New, Save, Sav...

File Menu: Under it there are New, Save, Save as, Save as template, Import, Export, Preview in browser etc. options. Edit Menu: In this menu there are Cut, Copy, Paste, Undo,

Personal computer software, Personal Computer Software     The perso...

Personal Computer Software     The personal computer software market has burgeoned from the past decade. Spreadsheets, Word processing, computer graphics, database managemen

Show packing and unpacking data, Q. Show Packing and Unpacking Data? P...

Q. Show Packing and Unpacking Data? Packing and Unpacking Data  pvm_packs - Pack active message buffer with arrays of prescribed data type: int info = pvm_pac

Illustrate simple ALU organisation, Q. Illustrate Simple ALU Organisation? ...

Q. Illustrate Simple ALU Organisation? An ALU comprises circuits which perform data processing micro-operations. Though how are these ALU circuits used in conjunction of other

Environments -artificial intelligence, Environments: We have seen that...

Environments: We have seen that an agents intelligent should take into account certain information when it choose a rational action, including information from its sensors, in

How a physical addressing is performed in wan, How physical addressing is p...

How physical addressing is performed in WAN? WAN networks operate as similar to a LAN. All WAN technology classifies the exact frame format a computer uses while sending and re

What are different control function categories, What are different control ...

What are different control function categories. Explain. In several switching systems, the control subsystem may be an integral part of the switching network itself. This syst

State about the mp4- mpeg-4, MP4 (MPEG-4) MPEG-4 files are in a format ...

MP4 (MPEG-4) MPEG-4 files are in a format which can hold a mixture of multimedia objects like video, audio, animation, images etc. MP4 players again use compression technology

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