Compilers: What is the first set and the follow set of S, L and L’? 4. A). Consider this grammar:S-> (L) | aL-> SL'L' -> )SL'What is the first set and the follow set of S, L and L'?

First Sets:First(S):From S→(L): The first set includes (.From S→a: The first set also includes a.So,…

Answered: 4. A). Consider this grammar: S-> (L) |…

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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This is a question from my first Theory of Computing practice homework assignment included as an image. I need help with all three parts (a,b, and c) if possible.
Q1: Write a grammar for the language that includes all strings containing n copies of alphabet a, followed by n+1 copies of the alphabet b. Assume ? > 0. Upon completion of the grammar definition, draw the parse tree for the sentences abb and aabbb along with the derivations.Q2: Consider the identifier definition of a hypothetical programming as follows: strings of consist of letters and numbers, and they must begin with a letter.
"Introduction to Formal Languages and Automaton" by Peter Linz, 6th edition, 2017. The cut is from chapter 1, section 2, e 14.
A) Write a BNF grammar for the language consisting of strings built only of the letters a and b. The strings may have any number of these letters, but the letter combinations bb must be in each string somewhere, and each string must start with a aa. For example, the strings aaabbabbba, aaaababba, and aababbabb are in the language, while a, bba, ababb, aabaa, and bbaa are not. B) Draw the parse tree for string aabbaaba according to the previous grammar: C) Describe, in complete English sentences and “layman’s terms,” the language defined by the following grammar in BNF (start symbol is <S>):<S> ::= <A>a | b<C> ::= c<A> ::= a<A>a | <C> ::= bb | <C>
fill out those two table?
arrow_forward Step 1 Context Free Grammar: A formal language that is used to generate all possible strings in a given formal language is called context free grammar. It can be defined as: G=(V, T, P, S) Where G specifies the grammar V specifies the finite set of non-terminal symbols. T specifies the finite set of terminal symbols. P specifies the set of production rules. S specifies the start symbol. The start symbol S is used to derive a string in a context free grammar. It is derived by repeatedly replacing a non-terminal symbol by the right-hand-side production until all the non-terminal symbols have been replaced by the terminal symbols. arrow_forward Step 2 G is a context-free grammar for a language L, and L contains only strings of length 2 or greater. We have to prove that there is a context-free grammar Gd which generates L such that every rule in Gd has the form A -> x1x2, where A is a terminal and each xi is a terminal or a non-terminal. Let the alphabet of…
a. Write a BNF grammar for the language consisting of strings built only of the letters a and b. The strings may have any number of these letters, but the letter combinations bb must be in each string somewhere, and each string must start with a aa. For example, the strings aaabbabbba, aaaababba, and aababbabb are in the language, while a, bba, ababb, aabaa, and bbaa are not. b. Draw the parse tree for string aabbaaba according to the previous grammar: c. Describe, in complete English sentences and “layman’s terms,” the language defined by the following grammar in BNF (start symbol is <S> ): <S>::= <A>a|b <C>::= c <A>::= a<A>a|<C> ::= bb|<C>
Problem 2 Let & be the language defined by the regular expression: aald Ucc) (bane") Write a complete formal definition of a context-free grammar tha
"Introduction to Formal Languages and Automaton" by Peter Linz, 6th edition, 2017. The cut is from chapter 1, section 2, e 17, d, e, f.
1. Consider the following Grammar S- E E – TE' E' → +E |-E | ɛ | F → id | num T - FT' T' → *T | /T | E a) Is it ambiguous? b) is it left recursive? c) is it LL(1) grammar?
6. Find an s-grammar for L = {a2nb" :n 2 2}. 7. Convert the grammar S- assb | bSa |a | b| ab into Greibach normal form.
7. a. Write a BNF grammar for identifiers that consist of an arbitrarily long string of letters and digits, the first one of which must be a letter. b. Using your grammar from Exercise 7a, show a parse tree for the identifier AB5C8.

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4. A). Consider this grammar: S-> (L) | a L-> SL' L' -> )SL' What is the first set and the follow set of S, L and L'?