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let ∑ ={a,b} construct the DFA that accepts of all Strings ending in bab

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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let ∑ ={a,b} construct the DFA that accepts of all Strings ending in bab

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#include<bits/stdc++.h>using namespace std;bool isPalindrome(string &s){ int start=0; int end=s.length()-1; while(start<=end) { if(s[start]!=s[end]) { return false; } start++; end--; } return true;}int main(){ string s; cout<<"ENTER STRING:"; getline(cin,s); int n=s.length(); bool flag=true; for(int i=1;i<n;i++) { string lowerHalf=s.substr(0,i); string upperHalf=s.substr(i,n-i); if(isPalindrome(lowerHalf) && isPalindrome(upperHalf)) { flag=false; cout<<"String A is:"<<lowerHalf<<"\n"; cout<<"String B is:"<<upperHalf<<"\n"; break; } } if(flag) { cout<<"NO\n"; } return 0;} change to stdio.h string.h
9. a) Draw a DFA of strings where the 2nd last symbol is a. Σ= {a,b} Or, b) Draw a DFA of strings where the 3rd last symbol is 1. Σ= {0,1} [You may draw the NFA for this problem if you find it difficult to solve using DFA]
If L1= (a+b)*a and L2 = b(a+b)* Then Find : a) L1∩L2 b) L2`
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If L1= (a+b)*a and L2 = (a+b)*b Then Find : a) L1∩L2 b) L1∪L2 c) L2’