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 persistence, What is Persistence When you make an object, it e...

What is Persistence When you make an object, it exists for so long as you need it, but under no circumstances object exist when program terminates. While this makes sense at s

What is the use of status command, What is the use of status command, data ...

What is the use of status command, data output command, and data input command. A status command is used to test a variety of status conditions in the interface and the periphe

Determine the decimal equivalent of hexadecimal number, The hexadecimal num...

The hexadecimal number for (95.5) 10 is ? Ans. (95.5) 10 = (5F.8) 16 Integer part Fractional part 0.5x16=8.0

C++, pebble merchant

pebble merchant

Complicated question, Hi I need a help in this question : A telephone sw...

Hi I need a help in this question : A telephone switchboard handles ? calls on average during a rush hour, and the switchboard can at most make k connections per minute. Write a

Conclusion - artificial intelligence , Conclusion - artificial intelligence...

Conclusion - artificial intelligence : If we can determine what the exactly state of the world will be after an agent's action, so we can say the environment is deterministic.

Convention used to represent micro-operations, Q. Convention used to repres...

Q. Convention used to represent micro-operations? The convention used to represent micro-operations is: 1.  Computer register names are designated by capital letters (someti

What is datapool, A datapool is a source of variable test data that scripts...

A datapool is a source of variable test data that scripts can draw from during playback

Earned value analysis, Senior management has requested a status update on t...

Senior management has requested a status update on the workstation installation project.  As a part of this update, managers have requested that you present an Earned Value analysi

How do you import data from one more access database, The process of import...

The process of importing data from one more Access database follows these common steps they are. ? Preparing the document for import operation and make ensure that extensions ar

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