
Database System Concepts
7th Edition
ISBN: 9780078022159
Author: Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher: McGraw-Hill Education
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Question
What would be a regex for the language of attached document ?
And
Can you think of another (equivalent) regex for the
language of the attached document

Transcribed Image Text:Is the language composed of all strings over the
alphabet {a,b} that
contain an odd number of a's a regular language? If
so, show why.
Note, again, that you may use any line of argument
on
regular languages, e.g., by
drawing the FSA,or by using Closure properties of
regular languages, along with the
fact that the language is regular
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- Investigate operator precedence and associativity in different programming languages and how they may vary from one language to another.arrow_forwardIn order to have a better understanding of the CFG (Context Free Grammar) principles, could you please explain "Semantic augmentation" and offer an example? varrow_forwardExplain the differences between the various types of semantics, when and how they should be utilized, as well as the benefits and downsides of each kind of semantics.arrow_forward
- Give a CFG that generates the language defined by the regular expression ((ab* a) | (b(aa)*b))+ over the alphabet {a,b}. Show how you would modify your CFG for the regular expression ((ab*a) | (b(aaa)*b))+.arrow_forwardTo help me better grasp the ideas of CFG (Context Free Grammar), could you please offer an example of "Semantic Augmentation" and explain the principles?arrow_forwardExplain the differences between the various types of semantics, when and how they should be utilized, as well as the benefits and downsides of each kind of semantics.arrow_forward
- 1. Use the algorithm described in our course materials (videos) that takes a CFG and converts it into a CNF grammar that generates the same language as the original grammar, except possibly for the string A, to answer the following question. As part of your answer, you should say which variables are nullable, and you should give the appropriate grammar after each step of the algorithm. There are four steps. Give a CFG (context-free grammar) in CNF (Chomsky Normal Form) that generates the same language, except possibly for the string A, as the following grammar: S АВ → abA|A → bBb|bb A Barrow_forwardPlease explain what you mean by "static semantics" below. Kindly provide some instances of static semantic norms that are difficult to build using BNF.arrow_forwardExplain "static semantics." Submit BNF-difficult static semantics standards. Much appreciated.arrow_forward
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