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

Construct the finite automata, Give the regular expression of the set of al...

Give the regular expression of the set of all even strings over the alphabet {a, b} along with at least one of the two substrings aa or bb. As well construct the finite automata wh

Drawbacks, drawbacks of shadow paging

drawbacks of shadow paging

What is test factory, Rational Test Factory is a component-based testing to...

Rational Test Factory is a component-based testing tool that automatically produces TestFactory scripts according to the application's navigational structure. TestFactory is integr

Explain why most interrupts are active low, Explain why most interrupts are...

Explain why most interrupts are active low? This answers why most signals are active low when you see the transistor level of a module, active low implies that the capacitor in

-bit comparator using combinational logic, Design a 4-bit comparator using ...

Design a 4-bit comparator using combinational logic, and Karnaugh Maps. The inputs of the circuit are two 2-bit numbers. a) Construct the truth table given 2-bits inputs A and B, a

Menu driven program with following menu, Q.  Develop a Menu driven program ...

Q.  Develop a Menu driven program with following menu: 1.  Gray code 2.  BCD 3.  Excess-3 code 4.  Exit I/P must be a valid Binary number. Fractional numbers are all

Determine the frequency of the input signal, An eight stage ripple counter ...

An eight stage ripple counter uses a flip-flop with propagation delay of 75 nanoseconds.  The pulse width of the strobe is 50ns.  The frequency of the input signal which can be use

Disadvantages of edi(electronic data interchange), Disadvantages  1.  T...

Disadvantages  1.  The X12 standard is so large and general  2.  EDI communications negotiate a technical agreement to explain exactly what subset of EDI they will use

Define colour depth in graphic display system, Q. Define Colour Depth in gr...

Q. Define Colour Depth in graphic display system? It is clear that an image contains an array of pixels.  If we tell which pixels are 'off' and which are 'on' to the monitor, 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