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Let G be the grammar: Give a regular expression for L(G). Is G ambiguous? If so,...
4. (5 points) Is the following grammar ambiguous? Justify your answer (give a string and derive it with two leftmost derivations using G). If it is ambiguous, rewrite this grammar to an unambiguous one (hint: recall "dangling else" as we discussed in the class)
Given the following ambiguous context free grammar (3x20) 1. (a) Explain why the grammar is ambiguous (b) Find an equivalent unambiguous context-free grammar. (c) Give the unique leftmost derivation and derivation tree for the string s generated from the unambiguous grammar above. 2. Construct non-deterministic pushdown automata to accept the following language (20) 3. Convert the following CFG into an cquivalent CFG in Chomsky Normal Form (CNF) (20)-
Construct a regular grammar G
= {V,T,S,P} such that L(G)= L(r) where r is a regular expression
(a+b)a(a+b)*.
Question 10 Construct a Regular grammar G = (V, T, S, P) such that L(G) = L(r) wherer is the regular expression (a+b)a(a+b). B I VA A IX E 12 XX, SEE 2 x G 14pt Paragraph
the following grammar generates all regular expressions over the alphabet of letters (we have used quotes to surround operators, since the vertical bar is an operator as well as a metasymbol): rexp->rexp “|” rexp | rexp rexp | rexp “*” | “(” rexp “)” | letter a. give a derivation for the regular expression (ab|b)* using this grammar. b. show this grammar is ambiguous c. Rewrite this grammar to establish the correct precendences for the operators. d. What associativity does...
6. Draw the transition graph corresponding to the following regular grammar and find the regular expression of the language it generates. (10 points)
10. Consider the following CFG: Is the language generated by this CFG a regular language? If so, give a regular expression denoting it. If not, prove it.
10. Consider the following CFG: Is the language generated by this CFG a regular language? If so, give a regular expression denoting it. If not, prove it.
Please answer any 7 of them
ТОС Answer any 7 from the followings: 1. Regular expression to NFA: i) ab(aUb)* ii) (aba U a)*ab 2. Explain and construct a generalized NFA, 3. NFA to regular expression 0 3 91 93 8 a 4. DFA to regular expression 011 5. Explain the rules of pumping lemma briefly with an example. 6. Give an example of right linear grammar and left linear grammar. 7. L(G) = {1*20 m >= 1 and >=1}....
Give an unambiguous grammar for the same language generated by
the grammar:
<fruit>* : -<yellow» | <red> <yellow» banana |mango | <empty> <red> ::- cherry | apple | <empty> "Same language" means that the unambiguous grammar can generate exactly the same set of strings as the ambiguous grammar. No more; no fewer. There will of course be a difference in how - by what NTSs and productions - at least some of those strings are generated
* : -
How to change regular expression to regular grammar? Please give me with details and explain me with easy ways. For instance (10*)*(110v001)* Binary strings contain substring 1001 Binary bring contains exactly two zeros
The grammartofsm algorithm:
Let L be the language described by the following regular grammar: a. For each of the following strings, indicate whether it is a member of L: v. zyyzz b. Use grammartofsm (Rich 2008; page 157) to construct an FSM that accepts L c. Give a concise (but complete) description of L in plain English. We were unable to transcribe this image