Database System Concepts
7th Edition
ISBN: 9780078022159
Author: Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher: McGraw-Hill Education
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do a leftmost derivation of the statement
Y=X*(Z+Y) showing the sentential form of each step of the derivation
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- Develop a system/application in Prolog that will allow grader to: load a set of student’s grades (see samples from the Table C below) query student’s final letter grade (A, B, C, etc.) by a given student’s name. query student(s) whose grade matches to the input letter grade (e.g., A). For example, show student(s) whose final letter grade is A. There are 3 types of grades for each student—HWs, Exams, and Project, with a weight of 20%, 40% and 40%, respectively, to the 100-point final. Table A and B show how the final grades (in points and letter) are computed. Table C shows samples of students’ grades. You will define the execution instructions to answer the following questions so that grader can test out your application in Prolog: how to load your source code to Prolog runtime/compiler how to load students’ grades to Prolog runtime/compiler how to query student’s letter grade how to query student(s) whose letter grade matches to an input letter grade Please DO NOT hard code any…arrow_forwardWrite a denotational semantics mapping function for the Java do statement. Ma (do L while (B), s) A=arrow_forwardExplain the syntax of manipulator left.arrow_forward
- Q4) Draw the smallest DFA that accepts the language derived by the regular expression (0*1*|1*0*).arrow_forwardExplain the relevance of operator precedence in a few sentences.arrow_forwardQuestion 13 Write a function in Scheme or rules in Prolog called countlt that takes a list of numbers, L. and another number. N. and returns the count of numbers less than N in the list L. Example calls Scheme: (countlt '(6 1 9) 4) -> 1 (countlt '(50 27 13) 1) -> 0 Prolog ?- countlt (I6, 1, 91, 4, X) . X = 1. ?- countlt ( [50, 27, 131, 1, X). X = 0. Edit View Insert Format Tools Table 12pt v Paragraph v В I U ※ 总 !!arrow_forward
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