Consider the two regular expressions, L1 = = a* + b* and L2 = ab* + ba* + b*a + (a*b)* a) Find a string corresponding to L, but not L2. b) Find a string corresponding to L2 but not L1 c) Find a string in {a, b}* corresponding to

Consider the two regular expressions, L1 = = a* + b* and L2 = ab* + ba* + ba + (ab)* a) Find a string corresponding to L, but not L2. b) Find a string corresponding to L2 but not L1 c) Find a string in {a, b}* corresponding to

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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Ex1: If A=the odd numbers between (1,20), B= the even numbers between (2,20) find (1)A+B, (2)A.B, (3) A', B' ,(4)A'.B' ,(5)A*B, (6)A*B' (7) A'/B' ,(8)A'./B' ,(9)A/B (10)A./B
Subject: theory of computer science
An alternative way to write A[0] is a. &A b. A.0 c. *A[0] d. *A
a) Give an example of a string that is neither in the language of R nor in S. b) Give an example of a string that is in the language of S but not R. c) Give an example of a string that is in the language of R but not S. d) Give an example of a string that is in the language of R and S. e) Design a regular expression that accepts the language of all binary strings with no occurrences of 010.
Sample : "adataatada" is a palindromic string "robinson" is not palindrome
Q1 Strings from RES There are eight strings of length 4 which cannot be produced by the following regular expression over the alphabet Σ = {a,b}. What are they? (a+ba)* (ab+ba)(b + ab)*
Part 3 plase skip it if you dont know the correct answer i need it urgent. Will doewnvote in case of wrong or copied answers from chegg or bartleby! A regular expression (shortened as regex or regexp; also referred to as rational expression) is a sequence of characters that specifies a search pattern. Usually such patterns are used by string-searching algorithms for "find" or "find and replace" operations on strings, or for input validation. using regex create a python program to verify the string having each word start from 'f'? It should return True otherwise false.
a* or (a or b ) output= {aaa,b,a,aaaaa,a,b,b} convert this sentence into a c++ code NOTE1:the output is only an example and it's not necessary to be exactly similar the needed sentence to be converted is a* or (a or b ) NOTE2: by a* we mean the set of all finite strings formedby concatenating words from a, where any word may be used as often as welike, and where the null string is also included
***IN PSUEDOCODE ONLY - not a real programming language!!*** Question:A prime number is a number that is only evenly divisible by itself and 1. For example, the number 5 is prime because it can only be evenly divided by 1 and 5. The number 6, however, is not prime because it can be divided evenly by 1, 2, 3, and 6. Design a Boolean function called isPrime, that accepts an integer as an argument and returns True if the argument is a prime number, or False otherwise. Use the function in a program that prompts the user to enter a number and then displays a message indicating whether the number is prime. The following modules should be written: - getNumber, that accepts a Ref to an integer, prompts the user to enter a number, and accepts that input - isPrime, that accepts an integer as an argument and returns True if the argument is a prime number, or False otherwise - showPrime, that accepts an integer as an argument , calls isPrime, and displays a message indicating whether the…
1. What type of strings are accepted following Res? a. (a|b)* b. (ab)* c. (a+b)*b(a+b)* d. aa(a+b)* e. aa(a+b)*bb
One of the following is not accepted string for (a'b' |c* )* O a. (b, c, cc, aab, abc) Ob (a) Oc (abccce) O d All are accepted
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]