If a grammar can generate the same string using more than one derivation, then the grammar is ambiguous.
True
If a grammar can generate the same string using more than one derivation, then the grammar...
For the grammar <A> ::= <A><A> '+' | <A><A> '*' | 'a' and the string aa + a* Give the leftmost derivation Give the rightmost derivation Give a parse tree Is the grammar ambiguous or unambiguous? (Justify your answer) Describe the language generated by this grammar
3. Using the grammar below, show a parse tree and a leftmost derivation for the statement. A = ( A + (B)) * C assign <idxpr expr>? <expr> <term> term <term factor factor (<expr>) l <term I <factor l <id> 4. Prove that the following grammar is ambiguous (Give sentence that has two parse trees, and show the parse trees):
1. Consider the following grammar A - aB B-Sb (a) Show a derivation tree for the string aabbbb using the grammar. (b) Give an English description of the language generated by the grammar 2. Let G be the grammar below: S-ASB ab | SS (a) Show that G is ambiguous. (b) Construct an unambiguous grammar equivalent to G. 3. Find a context free grammar for the language L3- fa"b"c+m :n,m21) 4. Find a context free grammar for the language L4...
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 * : -
Construct context-free grammars that generate the given set of strings. If the grammar has more than one variable, we will ask to write a sentence describing what sets of strings expect each variable in the grammar to generate. For example, if the grammar was: I could say "C generates binary strings of length one, E generates (non-empty) even length binary strings, and O generates odd length binary strings." It is also fine to use a regular expression, rather than English,...
What is different about the following grammar? Is it more or less expressive than the grammar in problem 3? Is it ambiguous? < zip > ::= < zap > a < zap > | a < zap > ::= b | a | < zip >
please do B) for me a. Give the definition of a rightmost derivation of a context free grammar G b. Show that any string that can be generated by any context free grammer G can be generated by a rightmost derivation in that grammer G. a. Give the definition of a rightmost derivation of a context free grammar G b. Show that any string that can be generated by any context free grammer G can be generated by a rightmost...
Exhibit a derivation of the string bbbb using the following phrase structured grammar: S + YZY Z + BZC | e BC > CBB Bb + bB bC - Cb BY + Y YC - Y Yse
[Easy] Theoretical Computer Science Consider the grammar: Give a derivation for the string "aaaabbbbbb" and describe the language, i.e. general form of the strings generated by the grammar.
The following shows a context-free Tammar on {0, 1}. Show that the grammar is ambiguous by generating 2 derivation sequences for word 00111. S > AS5 A → Al|0A101 The following is a context-free grammar on alphabet {a}. Use the string a +a- a to verify whether or not the grammar is ambiguous. AA+AA-AA The following is a gamar equivalent to the one shown above in problem (5). Is it ambiguous? Use a +a- a to verify it. A →...