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 time slicing, What is time slicing? With this technique each pr...

What is time slicing? With this technique each program runs for a short period known as a time slice, and then another program runs for its time slice and so on.

Procedure which divides a 32-bit number by a 16-bit number, Write a procedu...

Write a procedure which divides a 32-bit number by a 16-bit number. The procedure must be general which is it's defined in one module and can be called from another assembly module

Which language is a platform free language, Which language  is a platform ...

Which language  is a platform free language Java language

Explain the life cycle of a process, Explain the life cycle of a process ...

Explain the life cycle of a process Each procedure has a life cycle, which consists of execution, creation and termination phases of the procedure.  A method may create severa

Group cells in a layout table, Now you will put navigation button cells you...

Now you will put navigation button cells you just created into a single table. Grouping cells into a table enables you to control cell spacing and to easily move the cells as a gro

Difference between narrative form and documentary form, Question: (a) E...

Question: (a) Explain clearly the difference between a Proposal and a Treatment for a video production project. (b) Explain clearly the difference between Narrative form an

Programmed input - output technique for computers, Q. Programmed input - ou...

Q. Programmed input - output technique for computers? Programmed input/output is a useful I/O technique for computers where hardware costs need to be minimised. Input or output

Determine the fastest logic, Which of the fastest logic: TTL, ECL, CMOS and...

Which of the fastest logic: TTL, ECL, CMOS and LSI ? Ans. The fastest logic family of all logic families ECL. High  speeds  are  possible  in  ECL  since the  transistors  a

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