Consider the following grammar: = A|B|C + | * | ()|Use the grammar above to derive the following sentence and draw a parse tree.((The answer is two-part Derivation and a parse tree.)A = B + C + AA B C +AA = (B+C) *AA = (BC) A

**Derivation:**1. Start with the given sentence: A = (B+C) * A2. Apply the production rules of the…

Answered: Consider the following grammar: =…

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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Rewrite the following EBNF grammar in BNF. <decl> → <ident_list> : (int | float | char); <ident_list> → <identifier>{,<identifier}.
help fill out the table
2. Create an LR Parsing table for the following grammar and show the steps to solve the following problems S-> aC | AC A -> a Bb | Aa B-> b B | CC C-> CCI d a. abbbccd www b. accd c. acdbaacd d. acdbd e. abcdbad wwwwwwwww
. Consider the following grammar (G1) for simple assignment statements. (The symbols that begin with upper-case letters are variables and Assign is the start variable.) Assign Id := Expr Id → abc Expr | Expr * Expr |(Expr) | Id Expr → Expr a) Give a (leftmost) derivation for string a := b ⋆ a — c. b) Give a parse tree for string a := b ⋆ a — c.
AST(abstract syntax tree) - Semantic computation for expressionE→TE'E'→+TE'│ε T→FT' T'→*FT'│εF→(E)│iDefine an attribute grammar which can construct an abstract syntax tree for an arithmatic expression by SDD.Define an attribute grammar which can compute the value of the expression and give the procedure of sentence 3+4+5.
using grammar 3.2 do a parse tree and leftmost derivation for A = A * (B + (C*A)) <assign> -> <id> = <expr> <expr> -> <id> + <expr> | <id> * <expr> | ( <expr> ) | <id> <id> -> A | B| C
3. Feature grammars, semantics (a) Consider the following context-free grammar: S + NP VP VP → VNP NP → he she | him | her → likes V Augment this grammar to become a unification-based (feature-based) grammar, by adding a 'case' feature, and constraints to enforce case agreement, to restrict the language to only those sentences that are correct English. You can use the notation used in the lectures or the notation of NLTK.
Use the bison framework to build a DFA state machine for each of the following grammars. Identify any possible conflicts causing the bottom-up parsing to fail. Make sure to complete the missing closures in each state. 1) expr expr '+' term | expr'-' term | term term – term ** primary | primary primary → ID | (' expr ')' |'-' primary 2) expr → expr '+' term | term term - term * primary | primary primary - ID | '(' expr ')' expr '+' term | expr'-' term | term term *" primary| primary primary → ID | '(' expr ')' | '' primary | ID '(' expr ')' 3) expr term
(a) Exhibit a derivation of the string aaaa using the following phrase structured grammar: S → YZY Z → BZC| E ВС Сав Ва — ав аС — Са BY → Y ҮС — Y Y → E (b) Find a match for the following instance of the Post Correspondence Problem (PCP): {=} {三目圖} b a bb
c++ question Describing Syntax and Semantics
NAT Lang processing: Please explain in detail Consider a CFG representing a phrase structure grammar for a natural language such as English, including the following rule (the period is part of the rule): S -> NP VP . In this rule, S, NP, and VP are non-terminal symbols, but we will assume that the period is a terminal symbol specifically representing a period (as opposed to some other end-of-sentence marker). So, we can interpret this rule as stating that a sentence can have the form of a noun phrase followed by a verb phrase followed by a period. (To implement a parser for grammars with rules like this, the tokenizer would have to treat periods as separate tokens.) Assume that you need to convert this grammar to Chomsky normal form (CNF), perhaps with the CKY parsing algorithm in mind. Using the procedure discussed in class, show the rules that might result from the conversion.

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Consider the following grammar: = A|B|C + | * | () | Use the grammar above to derive the following sentence and draw a parse tree. ((The answer is two-part Derivation and a parse tree.) A = B + C + A A B C +A A = (B+C) *A A = (BC) A