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1.Write a regular expression defining strings that begin with an a and end with a b and can contain any number (including zero) of c's or d's in the middle. Every c that is in the string must be followed by at least one d. 2. Construct a deterministic finite state automaton with no more than four states that accepts the language defined by the regular expression in problem 1. 3. Define an unambiguous context free grammar that generates the language of strings containing a series of a's followed by a series of b's followed by a series of c's concluding with a series of d's. The number of a's must be exactly the sames as the number of d's and the number of b's must be exactly the same as the number of c's. The strings must contain at least of instance one each of the four letters. Examples of valid stings are: aaabbccddd abbbcccd Is this a regular language? Explain your answer. 4. Provide a left-most derivation of the second example shown in the previous problem and a parse tree that corresponds to that derivation. 5. Define a language that is not a regular language using a context-free grammar that is not ambiguous. The alphabet of the language must contain at least five characters. Describe in English the strings of the language. Choose any string that is in the language and demonstrate that it is in the language by showing the left-most derivation that derives it. Draw the parse tree that corresponds to the left-most derivation. Give an example of one string that is not in the language.
Describe at least three issues/problems with Information Systems Management (ISM) in a named organization.
Create a class called Employee that includes three pieces of information as either instance variables or automatic properties - a firstname (type string), a last name (type string) and a monthly salary (decimal)
Give an example that illustrates why P must not be allowed to do so and state a condition that defines when P may resume sending messages related to application.
what challenges you think a computer forensic analyst and prosecutors would face when trying a case that involves digital evidence?
"'Recall that criteria creep' is the process of refining evaluation requirements as the industry gains experience with them, making the evaluation criteria something of a moving target. (See Section 21.2.4.2.)
Implement the following algorithm in C# using WFA GUI. Write the student info and processed data (student name, exams, avg and grade and ...) to student database
Given the list of all the product prices and wholesale prices as well as a list of all the items sold for each product calculate the net profit for all the products.
Write a program that displays the following pattern on the screen
Write a Java method which takes an integer array parameter and locates the minimum value in the array and outputs that value using System.out.printf. Use an enhanced for loop to process the array. You only need one loop to do this!
Write a program asks the user to enter a month (1 for January, 2 for February, and so on) and then prints the number of days in the month. For February, print "28 or 29 days". For example: Enter a mont: 5 30 days Do not use a separate if/else bran..
given a tiny computer that has a word size of 6 bits, what is the smallest negative number that this computer can represent if it uses two's complement form
allow different payment and shipping options. There are a plenty of examples of this kind of web sites. Some well-known ones are amazon.com, Barnes & Nobles, and Borders.
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