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

Sorting using interconnection networks, The combinational circuits employ t...

The combinational circuits employ the comparators for comparing the numbers and storing them on the basis of maximum and minimum functions. Likewise in the interconnection networks

Add a byte number from one memory location, Add a byte number from one memo...

Add a byte number from one memory location to a byte from subsequent memory location and put sum in the third memory location. Also save carry flag in the least significant bit of

Example on passing parameters through stack, Q. Example on Passing Paramete...

Q. Example on Passing Parameters through Stack? PROGRAM: Version 3 DATA_SEG               SEGMENT                         BCD DB 25h; Storage for BCD test value BIN

How is the command suppress-dialog useful, How is the command Suppress-Dial...

How is the command Suppress-Dialog useful? Suppressing whole screens is possible using this command.  This command permits us to perform screen processing "in the background".

What is an identification method, An identification method notifies Robot h...

An identification method notifies Robot how to recognize the values to compare during record and playback.

Typewriters with special attachments, Typewriters with special attachments ...

Typewriters with special attachments Certain special attachments can be used to the typewriter for typing work of a special nature. These are: The continuous stationery dev

What do you mean by information system, Q. What do you mean by Information ...

Q. What do you mean by Information System? An information system is an planned combination of hardware, people, communication networks, software and data resources that transfo

Does weblogic jms support clustering, WebLogic JMS handles cluster-wide, tr...

WebLogic JMS handles cluster-wide, transparent access to destinations from any server in the cluster. A system administrator can set up cluster-wide, transparent access to destinat

Mingw32 compiler, Although there are no compulsory "c" compiler for this su...

Although there are no compulsory "c" compiler for this subject, but the compiler we are going to use for this example is the Mingw32 compiler. Download the source code files fro

Explain what is data mining, What is data mining? Data Mining: It...

What is data mining? Data Mining: It is an analytic process designed to explore data and after that to validate the findings through applying the detected patterns to lat

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