Let $ L_2 $ be the language defined as follows:\[ L_2 = \{ 0^n1^m0^n \mid n, m \geq 0 \} \]Which of the following context-free grammars generates the language $ L_2 $?(Here all uppercase letters are variables)1. - $ A \rightarrow 0A0 \mid B $ - $ B \rightarrow 1B \mid \epsilon $2. - $ S \rightarrow S1 \mid A $ - $ A \rightarrow A1 \mid B $ - $ B \rightarrow S $3. - $ A \rightarrow 0A0 \mid 1A \mid \epsilon $4. - $ S \rightarrow 0S0 \mid A $ - $ A \rightarrow 1 \mid S \mid \epsilon $

Answered: Let L2 be the language defined as…

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: S➞ AA➞ aBA'A'➞ dA'/∈B➞ bC➞ g What is the follow of C?1. Ø2. { $ }3. { g }4. { ∈ } Note: Select 1 answer from 4 options.
Which one of the following are accurate statements. A. Every NFA can be converted to an equivalent PDA. B. Every nondeterministic PDA can be converted to an equivalent deterministic PDA. C. Every regular grammar is a context-free grammar B ▾ C ☐ A None of A, B, C
Go Language
1.F 1. Prove that the following language L is not contextfree: L = { a'b'a| j>i>1 }.
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Q1: Compute the weakest precondition for each of the following assignment statements and postconditions: a) a=2* (b - 1) -1 {a > 0} b) b=(c+10)/3 {b>6} c) a=a+2*b-1 {a > 1} d) x=2* y+ x -1 {x > 11} Q2: Using the grammar, show a parse tree and a leftmost derivation for each of the following statements: → → A| BI C → + | |( ) 1. a. A = A * (B + (C * A)) b. B C* (A * C+ B) с. А - А * (В + (C))
Let L, and L2 be the languages defined as follows: L1 ={ xe{0,1}* | x has an odd number of Os}. L2 ={ 0"1m0" | n, m 20} Which of the following context-free grammars generates the language L1 U L2? (Here all uppercase letters are variables) O E- 1E| OF F- 1F| OE je A- OAO | B B - 1B|E OS-E|A E - OF | 1E F- OE | 1F|E A- OAO | 1A|E OS- S1 | S2 S1 → 00S | 15 | 01A| 10A | B A- 10S | 01S B-1|8 S2→ OS,0| A2 A2 - 1| S2|E S-E|A E- 1E| OF F- 1F| OE je A- OAO | B B- 1B|E
What language does the following grammar generate? Use set notation, English or regular expression to describe it. S->bA | b A->abA | abS
Hello , the question below is from concepts of programming languages book by Robert sebasta , Q) Write an attribute grammar whose BNF basis is that of Example 3.6 inSection 3.4.5 but whose language rules are as follows: Data types cannotbe mixed in expressions, but assignment statements need not have thesame types on both sides of the assignment operator.Example 3.6 is attached as image . P.S : please explain the answer to me as I have shared the question twice today but the answer didn't convince me.

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Let L2 be the language defined as follows: 12 =( 0"1"0" | n, m20} Which of the following context-free grammars generates the language L2? (Here all uppercase letters are variables) A- OA0 B B - 1B|E O S-SIA A-A|B|E B -S