4. Write a regular expression (RE) to define the language of all strings that start with'bb' and contain the substring 'aa' and finish with 'a'.5. Give a Push Down Automaton (PDA) to decide the language { arban+1 /n>=0}6. Give a Context Free Grammar (CFG) to define the language { arb2n+1 /n>=0}7. Give a Turing machine to decide the language:{w in {a,b}* / w starts with "aa" and ends with "ba"}

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4. Write a regular expression (RE) to define the language of all strings that start with 'bb' and contain the substring 'aa' and finish with 'a'. 5. Give a Push Down Automaton (PDA) to decide the language { a^b²n•1 /n>=0} 6. Give a Context Free Grammar (CFG) to define the language { a•b?n+1 /n>=0}

4. Write a regular expression (RE) to define the language of all strings that start with 'bb' and contain the substring 'aa' and finish with 'a'. 5. Give a Push Down Automaton (PDA) to decide the language { a^b²n•1 /n>=0} 6. Give a Context Free Grammar (CFG) to define the language { a•b?n+1 /n>=0}

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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