Chapter I A Weak Post’s Theorem and the Deduction Theorem Retold This note is about the Soundness and Completeness (“Post’s Theorem”) in Boolean logic. 1. Soundness of Boolean Logic Soundness is the Property expressed by the statement of the metatheory below: IfΓ⊢A,thenΓ|=taut A (1) 1.1 Definition. The statement “Boolean logic is Sound” means that Boolean […]
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INFO20003 Exam – Semester 1 Suggested Solutions and Marking Scheme Oscar Correa and Colton Carner July 2020 0.1 ER Modelling I (Exam Q8 – 15 marks) 0.1.1 VicRoads VicRoads wants to upgrade its database and it hired you to be in charge of the design of the roadwor- thiness certificates section. The relevant information is
ECON 102: National Accounts Formulas In this document, we present the most important formulas used in Module 5. GDP Related Measures GDP versus GNP The link between the gross domestic product (GDP) and the gross national product (GNP) is: GDP + NFP = GNP , where NFP is the net factor payments from abroad: income
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• • All of Chapter 11 of Ramakrishnan & Gehrke (textbook, pages 370-386) Chapter 11: Hash-Based Indexes Extendible Hashing and Linear Hashing Ed Knorr, Slides from Fall 2020 Based on: Your hashing knowledge from CPSC 221 or equivalent 1 Some Learning Goals Compare and contrast the performance of hash-based indexes versus tree-based indexes (e.g.,
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Transaction Management Ed Knorr, Fall 2020, CPSC 404 Based on: Chapter 16 of Ramakrishnan & Gehrke (textbook) with an introduction to content from Chapters 17 & 18 1 Some Learning Goals Define the terms transaction, atomicity, and consistency; and describe the relationship among those terms. Give reasons for allowing concurrency in a database
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CS5481 Data Engineering Tutorial 8 1. Consider the relations r1(A,B,C), r2(C, D, E), and r3(E, F) in which r1 has 1,000 tuples, r2 has 1,500 tuples, and r3 has 750 tuples. a) Suppose the primary keys of r1, r2 and r3 are A, C, and E, respectively. Estimate the size of r1 r2 r3. b)
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CS5481 Data Engineering Tutorial 12 1. (a) With immediate modification, modified buffer blocks can be written to the disk even if the transactions that made those modifications have not all committed. Is there any drawback if this is not allowed? • It may not work with transactions that perform a large number of updates, since
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3-16. ARTIFICIAL INTELLIGENCE — MODEL ANSWERS 1. The question tests basic understanding of Prolog, data structures, and recursion. The first three parts should be relatively straightforward for anyone who and been to the lectures and done all the lab exercises. The last two parts require some application to convert the algorithmic specification given into declarative
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CS5481 Data Engineering Tutorial 3 1. Suppose that we have an ordered file with 30,000 records stored on a disk with block size 1024 bytes. File records are of fixed size with record length 100 bytes. a) Find the number of block accesses required to search for a record using a binary search. Number of
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3-16. ARTIFICIAL INTELLIGENCE — MODEL ANSWERS 1. The question tests basic understanding of Prolog, data structures and recursion. It should have been relatively straightforward for anyone who and been to the lectures and done all the lab exercises. The ‘nasty’ was in Part (b), where the question does not specify what to do with the