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

Determine the firewall in intranet technology, Determine the firewall in In...

Determine the firewall in Intranet technology Firewall remains the basic foundation of Internet and Intranet security, for many users getting into the corporate Intranet would

Explain the working of dynamic ram - computer memory, Explain the working o...

Explain the working of Dynamic RAM? A plain piece of hardware called a DRAM controller can be used to make DRAM behave more like SRAM and the job of the DRAM controller is to p

How branching takes place in instruction pipeline, How branching takes plac...

How branching takes place in Instruction pipeline. Explain with suitable examples

Explain about octal numbers system, Q. Explain about Octal Numbers system? ...

Q. Explain about Octal Numbers system? An octal system has 8 digits signified as 0,1,2,3,4,5,6,7. For finding equal decimal number of an octal number one has to find quantity o

Define compilers and interpreters with high level language, Define compiler...

Define compilers and interpreters with high level language? Both compilers and interpreters are available for most high-level languages. Though LISP and BASIC are in particular

Explain the type of micro-operations, Q. Explain the type of micro-operatio...

Q. Explain the type of micro-operations? Let's first discuss type of micro-operations. Most common micro-operations performed in a digital computer can be categorized into 4 ca

What is time multiplexed space switching, What is time multiplexed space sw...

What is time multiplexed space switching? Explain w ith a neat diagram. Time division switches, an inlet or an outlet corresponded to a particular subscriber line with one s

Define the edge-triggered flip-flops, Define the Edge-Triggered Flip-flops?...

Define the Edge-Triggered Flip-flops? An edge-triggered flip-flop changes states either at the negative edge (falling edge) or at the positive edge (rising edge) of the clock p

What is the role of ir and pc, What is the role of IR and PC?  Instruct...

What is the role of IR and PC?  Instruction Register (IR) having the instruction being implemented. Its output is available to the control circuits, which make the timing signa

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