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 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

Explain the importance of search engines, Explain the importance of Search ...

Explain the importance of Search Engines The most effective way of finding information on the internet is to use a search engine. Though, it's just as easy to use these ineffic

What are the pros and cons of on-line documentation, Question 1: You wa...

Question 1: You want to perform the task of setting an alarm on your mobile phone. You can assume that the alarm option is accessible from the main menu of your phone. (a) P

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

What are advantages and drawbacks of flip-flop, What are advantages and dra...

What are advantages and drawbacks of flip-flop? Usually area of a Flip-flop for features in more than a latch. Power consumption is normally higher, because of the area and

Perform the subtraction using 1's complement, Perform the subtraction using...

Perform the subtraction using 1's complement of 11001 - 10110 Ans. 11001 - 10110 = X - Y                            X = 11001 1's complement of Y = 01001

Sorting circuit along with odd-even merging circuit, Q. Sorting Circuit alo...

Q. Sorting Circuit along with Odd-Even Merging Circuit? The merge sort algorithm needs two circuits which imply that one circuit for merging and another circuit for sorting the

Explain dial tone and ringing tone in strowger telephony, Explain Dial Tone...

Explain Dial Tone and Ringing Tone in strowger telephony. Dial Tone: it is used to indicate that the exchange is ready to recognize dialed digits by the subscriber. The subsc

By which the information is stored in ROM, The information in ROM is stored...

The information in ROM is stored ? Ans. By the manufacturer throughout fabrication of the device.

What do you mean by system calls, What do you mean by system calls? Sys...

What do you mean by system calls? System calls give the interface among a process and the operating system. When a system call is executed, it is treated as by the hardware as

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