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

How does computer know that overflow has happened, Q. How does computer kno...

Q. How does computer know that overflow has happened? Illustration: Add numbers 65 and 75 in 8 bit register in signed 2's complement notation.  Here expected result is

Define decision support system, Q. Define Decision Support System? An...

Q. Define Decision Support System? Ans. The decision support system is an information system application which help decision making. DSS tends to be used in planning or analy

Enumerate in brief about the intranet security policy, Enumerate in brief a...

Enumerate in brief about the Intranet security policy An Intranet security policy is a very broad topic and it cannot be covered easily in few pages since it differs from situa

Logical drives is it possible to fit onto a physical disk, How many logical...

How many logical drives is it possible to fit onto a physical disk? Ans) Maximum of 24 logical drives can be fit into physical disk. The extended partition can only have 23 lo

Units of artificial neural networks, Units of artificial neural networks: ...

Units of artificial neural networks: However the input units simply output the value that was input to them from the example to be propagated. So every other unit in a network

Pipe and filter , How to draw the pipe and filter using data flow and it co...

How to draw the pipe and filter using data flow and it components and connectors

Role of internet in progressing sciences, Ask question #Minimum 100 wordswh...

Ask question #Minimum 100 wordswhat is the .role of internet in progressing sciences accepted#

Interrupts - computer architecture, Interrupts Interrupt-request lin...

Interrupts Interrupt-request line o   Interrupt-acknowledge signal o   Interrupt-request signal Interrupt-service routine o   May have no relationship t

Impact of information systems, What are the primary impacts of information ...

What are the primary impacts of information systems on an organization (employer, club, school, religious, etc..) for which you are familiar? What are the primary ways in which

What is scan, What is "Scan"? Scan Insertion and ATPG helps test ASICs ...

What is "Scan"? Scan Insertion and ATPG helps test ASICs (e.g. chips) during manufacture. If you know what JTAG boundary scan is, then Scan is the similar idea except that it i

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