4 We learned an algorithm for converting any DFA into a regular expression. This problem asks you a few questions about that algorithm. a) In the first phase of the algorithm, we must modify the automaton to make sure it satisfies some properties that are necessary for the algorithm to work correctly. What are those properties? b) Demonstrate how to do the first phase using the DFA below. start c) In the second phase, states are "ripped out" of a GNFA until only two states remain. Using that process, show what happens when state a is ripped out of the GNFA shown below. (You don't have to complete the process, just do this one step.) start +) (0U1) 01'0

4 We learned an algorithm for converting any DFA into a regular expression. This problem asks you a few questions about that algorithm. a) In the first phase of the algorithm, we must modify the automaton to make sure it satisfies some properties that are necessary for the algorithm to work correctly. What are those properties? b) Demonstrate how to do the first phase using the DFA below. start c) In the second phase, states are "ripped out" of a GNFA until only two states remain. Using that process, show what happens when state a is ripped out of the GNFA shown below. (You don't have to complete the process, just do this one step.) start +) (0U1) 01'0

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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Attempt to unify the following pairs of expressions. Either show their most general unifiers or explain why they will not unify. p(A,B,c) and p(Q,r,S)
write algorithm or theory of the following problem. Dont write code, Narrative 2: We need to have a generic module which reads in file and gives the output in the format which would facilitate other programs to do comparison like the one we saw above to carry out analysis and comparison. Response Required: Write a program that reads a given text, outputs the text as is, and also prints the number of lines and the number of times each letter appears in the text. An uppercase letter and a lowercase letter are treated as being the same; that is, they are tallied together. Since there are 26 letters, we use an array of 26 components to perform the letter count. We also need a variable to store the line count. The text is stored in a file, which we will call textin.txt. The output will be stored in a file, which we will call textout.txt Input: A file containing the text to be processed. Output: A file containing the text, number of lines, and the number of times a letter appears in the…
DO NOT COPY ANSWER FROM ANOTHER QUESTION LEAVE IF you cannot do it perfectly. Otherwise, I will not only DOWN the vote but also REPORT you to the official Chegg team.I won't stop calling Chegg until they really pay attention to this trash behavior. Write a structurally recursive function (prefix->postfix exp) that takes as input an expression in the same little language as Problem 4. prefix->postfix returns an expression of the same form as its input, except that all function applications have been reversed. Finish this Racket code below to answer the question above.(define prefix->postfix(lambda (exp)))
e. Problem 5. Devise a function that receives a string and computes how many asterisks are in the string with a recursive method. For instance, if the input is "Able was I ere ***Elba", the function should output 3. If the input is "Peanuts", the function should return 0. Approach: Let's assume the signature of our function is countAsterisks(s) where s is the input string. In the body of your function, check if s[0] is equal to an asterisk. If the string contains only a single character and it is an asterisk, return 1. If the string contains only a single character and it is not an asterisk, return 0. If the string is longer than one character, determine if the first character is an asterisk and count it if this is the case. Then, create a new string s1 that is the same as the input string s but without the first character. Recursively call countAsterisks (s1) and return the value returned from this recursive call, plus one (if there is an asterisk in s[0]). Also, writing any explicit…
In c++ , perform deletion at the start, middle and end as well and perform the shrinking operation as well. ( Drop code in words , explain the code and drop the screenshot of output as well )
Consider the expression (6+3*4)/(7-1) In order to evaluate the expression it must be converted to Postfixnotation. Describe the process of conversion, then use that processto convert the above expression to Postfix. Note that if you don'tremember exactly how to process parenthesis, simply process them ina separate area until you get to the end of the parenthesized partof the expression. Then convert the expression to Postfix NOTE: You must show all work. Once you have your Postfix expression, now describe how to evaluateit. Then show the evaluation steps for the expression to generate afinal result. Again in order to get full credit you must show allwork.
Must be new solution and run on GNU Common Lisp! Using Lisp, write a program that solves the Missionaries and Cannibals problem that uses a DFS( depth first search). It should use (mac start end). Start is the current state (which can be (3 3 l) and End is the goal state (which can be (0 0 r). This should output the sequences of moves needed to reach the end state from the start state. This should print nil if there is no solution. For example, the call should be something like this! Call: (mac '(3 3 l) '(0 0 r)) Output: ((3 3 l) (2 2 r) (3 2 l) (3 0 r) (3 1 l) (1 1 r) (2 2 l) (0 2 r) (0 3 l) (0 1 r) (1 1 l) (0 0 r))
In Lisp
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