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

Tools for performance measurement, Tools for Performance Measurement Th...

Tools for Performance Measurement The reason behind these algorithms has been to gain a speed up and improve the performance. After the parallel algorithm has been written and

What are invisible components, They are light weight components that do no ...

They are light weight components that do no painting, but can take space in the GUI. This is mainly used for layout management.

What are the advantages of batch processing, What are the advantages of bat...

What are the advantages of batch processing This has the advantage which jobs can be processed when computer resources are less busy (for example during the evening or at night

Why use a DTD (Document Type Definition), Why use a DTD ( Document Type Def...

Why use a DTD ( Document Type Definition )? XML gives an application independent method of sharing data. Along with a DTD, independent group of people can agree to employ a com

What is a PCI bus and discuss its aspects and usage, What is a PCI bus? Dis...

What is a PCI bus? Discuss its aspects and usage. Peripheral Component Interconnect (PCI): This bus was developed by Intel and introduced in 1993. It is geared specifically to

Explain clearly the difference between j-cuts and l-cuts, Question: (a)...

Question: (a) Explain clearly the difference between J-cuts and L-Cuts. (b) What is the function of the rate stretch tool? (c) What's the difference between an Image Matt

How the temperature effecting the delays in a chip, How the temperature eff...

How the temperature effecting the delays in a chip The delays are directly proportional to the temperature. As the temperature enhances the delays are enhances and chip wil

Define rules for reducing karnaugh maps, Define Rules for Reducing Karnaugh...

Define Rules for Reducing Karnaugh Maps? The rules for reducing Karnaugh Maps (k- maps) are as follows: All of the 1's in the Karnaugh Map are called as minterms. The

Instruction length - assembly language, Instruction Length: Variabl...

Instruction Length: Variable-length instructions (Intel 80x86, VAX) need multi-step fetch and decode, but permit for a much more flexible and compressed instruction set.

Show the memory hierarchy of computer system, Q. Show the Memory Hierarchy ...

Q. Show the Memory Hierarchy of computer system ? Memory in a computer system is essential for storage and subsequent retrieval of instructions and data. A computer system uses

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