Can you help me solve this problem? Consider the following grammar (given in Chomsky normal form):SABABS | bBSA | aa. The shortest string generated by this grammar is ba. The shortest strings not generated bythis grammar are €, a, and b. Give the next two shortest strings generated by this grammar,and two other short strings not generated by this grammar.b. Draw the parse tree given this grammar for the string bbaaba.c. Find a long path -- eg, with 5 nonterminals -- from the root to a leaf in your parse tree.Starting at the bottom of that path, find the first nonterminal that appears twice along thepath. Circle the two occurrences of the repeated nonterminal, and draw an outline aroundthe subtree generated by the lower occurrence and an outline around the subtreegenerated by the upper occurrence. In accordance with the Pumping Lemma for the CFLsand given the string z = bbaaba, what are the values of the 5 substrings U, V, W, X, Ydetermined by the subtrees you have indicated? Be sure to give a value (even if just €) foreach of the 5 variables.

Detailed explanation: Let's break down each part of the problem:a. The next two shortest strings…

Answered: Consider the following grammar (given…

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Consider the following grammar: - a b b | b - a | a Which of the following sentences are in the language generated by this grammar? Show a parse tree for these sentences. 3. baab bbbab bbaaaaa bbaab bababa bbaabbaa
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Consider the following CFG with alphabet {a, b} and start variable S: S- AB A- aAa B- ÞBb a. What is the shortest string in the language of the grammar excluding the empty string? b. Draw the derivation tree for the string in (a). c. Explain whether this grammar is ambiguous or not? d. Describe in English the language generated by the grammar. e. Explain why this CFG can or cannot generate a regular language.
For this Context Free Grammar: G = ( {S}, {a+b, a-b, +, −}, S, {S S+S | S-S|a|b}) This related Parse (Derivation) Tree is given: S a S b S S The string associated with this parse tree is Since there are muliple parse left parse tree to create this string, therefore G is an
What is the problem with a grammar that generates two different parse trees? Give an example Construct the NFA that will accept the string of (dc|ac)* dc (gg|bb)*dc.
1. Consider the grammar with productions S -> aABb, A -> bB, B -> A | λ. (a) Give a leftmost derivation of the string abbb. (b) Draw a derivation tree that yields the string abbb. (c) Prove that the grammar is ambiguous by providing a different leftmost derivation of the string abbb from that you give in (a)
Given the following grammar and the right sentential form S→ aAb | bBA A → ab | aAB B → aB | b Draw a parse tree for: aaAbBb Show the phrases and simple phrases, and the handle.
1. Consider the grammar with productions S ? aABb, A ? bB, B ? A | λ. (1) Give a leftmost derivation of the string abbb. (2) Draw a derivation tree that yields the string abbb.
Consider the ambiguous grammar S → ABS | ABA → aA | λB → bB | λ What is the shortest string in L(S) other than λ that can be used to show the grammar is ambiguous? Write the string without any spaces or quotation marks. Now show the grammar ambiguous by giving two derivations for the string (each derivation should have a particular important property). Give the two shortest derivations you can find, writing the shorter one in the first box. Your derivations should begin with S, end with your chosen string, and only make one substitution per step. Do not include any spaces, quotes, or lambdas in your answer. Use the ">" character to represent the right arrow. For example, S>aSb>ab might be a legal derivation for a string in another language.
Show that the following grammar is ambiguous – show two distinct parse trees for one terminal string. E? E + E | id
1. Draw a parse tree for the string ddadddd using buttom-up and Top-down methods with the Context-Free Grammar below:Q → dQbb | FF → aF | ε 2. What is the problem with a grammar that generates two different parse trees? Give an example. 3. Differentiate between top-down and bottom-up parsing methods using a typical grammar. 4. Write a regular expression to describe inputs over the alphabet {a, b, c} i) that are in sorted order ii) containing at least one a and at least one b 5. Construct the NFA that will accept the string of (dc|ac)* dc (gg|bb)*dc.
Some of the following grammars may be ambiguous; for each ambiguous gram- mar, show two different derivation trees for the same input string: (d) 1. SaS bc 2. S→ AB 3. A -> a 4. B -> b

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