Let C be the language of all valid delimited comment strings. A member of C must begin with /# and end with #/ but have no intervening #/. For simplicity, we'll say that the comments themselves are written with only the symbols a and b; hence the alphabet of C is Σ = {a, b, /, #}. 1. Give DFA that recognizes C. 2. Give a regular expression that generates C.

Let C be the language of all valid delimited comment strings. A member of C must begin with /# and end with #/ but have no intervening #/. For simplicity, we'll say that the comments themselves are written with only the symbols a and b; hence the alphabet of C is Σ = {a, b, /, #}. 1. Give DFA that recognizes C. 2. Give a regular expression that generates C.

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

See similar textbooks

Similar questions

In certain programming languages, comments appear between delimiters such as /# and #/. Let C be the language of all valid delimited comment strings. A member of C must begin with /# and end with #/ but have no intervening #/. Assume the alphabet Σ for C is Σ = { a, b, /, #}. Give a regular expression that generates C.
There is a line y=mx+c and a point (a,b) on a graph and our aim is to make the line touch the point by adjusting in it's gradient and y-intercept. In C++, R and python write a code that can make the line touch the point no matter where it is on the graph.
In this work, we ask you to design a deterministic Finite Automaton (FA) to recognise arithmetic expressions. When we say arithmetic expression, we mean a kind of expression you can type in a very basic desk calculator. That is, neither variables nor brackets are allowed. It contains only numbers and four arithmetic operators, +, -, *, and /. The following are some examples of arithmetic expression: 1. Any number string with or without signs - e.g. 3, -1, +10, 3.14, -0.70 and 099. 2. Number strings mixed with arithmetic operators e.g. 3+5, -1+2*3, 7/10-0.7, and -1.4-+8.2. An example of FA diagram for recognising a non- negative integer is given below. You may use it as a start point. You need to add a few more states and transitions to handle numbers with decimal point and signs (e.g. -5, +2, 0.21, -32.6, +99.05, but not the form 1.0E-3). Most importantly, you also need to add a few more things to deal with the arithmetic operators +, -, *, /. →start 0-9 digit 0-9
A uwuified sentence is sentence that has been transformed using a made-up Internet language in which some of the letters in the words are replaced by something else. The exact scheme is described below: Any uppercase/lowercase R or L is replaced by w/w, respectively. • If we encounter an o/o in a word, check if the previous letter (if it exists) is an M/m or N/n. If the previous letter is one of these, insert the lowercase letter y in between them, regardless of the capitalization of the other letters. • All other characters are left unchanged. Some examples: Professor will be converted to Pwofessow (There are two r's that are replaced by w's. Since the two o's aren't proceeded by an M/n or N/n, no y will be inserted.) LLunoacyo will be converted to wwunyoacyo (The two L's will be replaced with two ws according to the first rule. Then the first o will have a y inserted in front of it between then and the o according to the second rule. The last o won't have a y inserted in between…
Suppose a string Z is formed by interspersing the characters from other two strings X and Y. The new string Z is called a shuffle of X and Y if characters in Z com- ing from the same string still keep the order as in the original string. For example, the strings PRODGYRNAMAMMIINCG and DYPRONGARMAMMICING are both shuffles of DYNAMIC and PROGRAMMING: PRODGYRNAMAMMIINCG DYPRONGARMAMMICING Given three strings A[1..m], B[1..n], and C[1..m+n], design a dynamic programming algorithm to determine if C is a shuffle of A and B.
Code it. Code with explanation.
Write regular expressions for the following languages. By “word”, we mean an alphabetic string separated from other words by whitespace, any relevant punctuation, line breaks, and so forth. (a) The set of all alphabetic strings;(b) The set of all lower case alphabetic strings ending with a letter b;(c) The set of all strings with two consecutive repeated words (e.g., “Humbert Humbert” and “the the” but not “the bug” or “the big bug”);(d) All strings that start at the beginning of the line with an integer and that end at the end of the line with a word;(e) All strings that have both the word grotto and the word raven in them (but not, e.g., words like grottos that merely contain the word grotto);
Let L be the language over {a, b,c,d} accepting all strings so that: 1.All c’s occur before the first b. 2.All d’s occur after the first b. 3.The last symbol of the string is d. 4.Each a is immediately followed by an odd number of b’s. Note that there are additional rules implicit in these rules. As you find them, obey them. By any constructive method you choose, demonstrate that L is regular.
Q5: Design a PDA for accepting a language (0"1"0 | m, n-1} give the ID form as we explain in the lecture. Apply the string "00011000" on this PDA using ID transitions.
Handwritten plz
Provide a subroutine that breaks down basic noun-verb-object sentences into their component pieces. For instance, the phrase "Mary walked the dog" is broken down into the following: Noun: MaryVerb: walkedObject: the dog Both StringBuilder objects and String objects should be compatible with this method.
write a Java program for string functions (Comparison, Length, Reverse order).