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

Assembly Language, Write an assembly program to simulate a microwave

Write an assembly program to simulate a microwave

Elements of composition, The Elements of composition are the formal languag...

The Elements of composition are the formal language used to communicate in the visual arts. The elements of composition can be loosely broken into 5 main elements, Line, shape, val

What is meant by a field, What is meant by a field The consecutive nonw...

What is meant by a field The consecutive nonwhite space characters that define a data item collectively define a field. It is possible  to limit the number of such characters b

What is one-way association, What is one-way association? One-way assoc...

What is one-way association? One-way association means association will traverse in only in one direction and implement using the actual implementation. If the multiplicity is

Show the comparison of ascii and ebcdic, Q. Show the Comparison of ASCII an...

Q. Show the Comparison of ASCII and EBCDIC? EBCDIC is an easier to employ code on punched cards due to BCD compatibility. But ASCII has some of major benefits on EBCDIC. These

Define in brief about the database management systems, Define in brief abou...

Define in brief about the Database Management Systems Databases (Database Management Systems - DBMS) Databases are used to organise and collect information. Most databas

Explain wait for graph-resource request and allocation graph, Explain Wait ...

Explain Wait for graph (WFG) with Resource request and allocation graph (RRAG). WFG with RRAG: A graph G = (V,E) is termed as bipartite if V can be decomposed in two

Determine about the logical shift, Logical shift A logical shift operat...

Logical shift A logical shift operation transfers 0 through serial input. We apply symbols shl and shr for logical shift left and shift right microoperations, examples:. R1

What is immediate addressing, What is Immediate addressing The  data  i...

What is Immediate addressing The  data  itself,  beside  the address,  is  given  as  the  operand or operands  of  the instruction.

Control-centered virtual manufacturing, Control-Centered Virtual Manufactur...

Control-Centered Virtual Manufacturing This is the addition of simulations to control actual processes and models, permitting for seamless simulation for optimization throughou

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