Delhi Noida Bhopal Hyderabad Jaipur Lucknow Indore Pune Bhubaneswar Kolkata Patna Web: Ph:
|
|
- Ira Moore
- 5 years ago
- Views:
Transcription
1 Serial : 0. PT_CS_DBMS_02078 Delhi Noida Bhopal Hyderabad Jaipur Lucknow Indore Pune Bhubaneswar Kolkata Patna Web: info@madeeasy.in Ph: CLASS TEST COMPUTER SCIENCE & IT Subject : DBMS Date of test : 02/07/208 Answer Key. (a) 7. (c). (a) 9. (d) 25. (b) 2. (d) 8. (a). (b) 20. (b) 26. (a). (b) 9. (d) 5. (c) 2. (d) 27. (b). (d) 0. (c) 6. (c) 22. (c) 28. (c) 5. (a). (c) 7. (b) 2. (b) 29. (c) 6. (c) 2. (a) 8. (a) 2. (c) 0. (d)
2 CT-208 CS DBMS 7 Detailed Explanations. (a) Every student can enroll more than one course. Every course can be enrolled by more than one student. Therefore it s many to many relationship. 2. (d) Both the statements are incorrect. The select operation is commutative i.e. σc ( σ ( )) ( ( )) c R σ 2 c σ 2 c R. Ultimately only those tuples will be selected which satisfy both C and C 2. Hence order does not matter. But Π (projection) operation is not commutative. Π ( Π ( R)) = Π ( R)) if and only if a is substring (or subset) of a 2, otherwise operation would be incorrect. a a2 a. (b) The correct matching is Pseudotransitive rule : If {X Y, YZ W} then XZ W Augmentation rule : If X Y then XZ YZ for any Z Reflexive rule : If X Y, then X Y Union rule : If {X Y and X Z} then X YZ. (d) COUNT ( ) returns a count of the number of rows retrieved, whether or not they contain NULL values. The group functions MAX, SUM and AVG ignore null values and perform their respective operations on non-null values only. 5. (a) For the output to be same as relation A two conditions must be satisfied. (i) A has no duplicates: If A has duplicates then output will not contain duplicates because of DISTINCT keyword (output will not be same as A(a, b)). (ii) B is non-empty: If B(c, d) is empty then cross product of A and B will result empty rows, so is the output (output will not be same as A(a, b)). 6. (c) B + trees are used for indexing because of the following reasons. High fan-out, which allows to direct searches to the leaf level. Leaf nodes are interconnected. Hence I/O cost is reduced drastically for range queries. 7. (c) The user (programmer) ensures that the database is in consistent state after the execution of transactions. Concurrency control manager ensures isolation. Recovery management component ensures atomicity and durability. 8. (a) The following conflicts leads to respective problems WR conflict : Reading uncommitted data. RW conflict : Unrepeatable read. WW conflict : Overwriting uncommitted data. 9. (d) 2PL ensures conflict serializability but may lead to deadlock. Time-stamp concurrency control algorithm is a non-lock concurrency control method. In time-stamp based method, deadlock cannot occur as no transaction ever waits.
3 8 Computer Science & IT 0. (c) A read-locked item is also called share-locked because other transactions are allowed to read the item. Hence multiple share-lock requests can be granted at the same time.. (c) The number of possible super keys is 2 = 8 These are actually the number of subsets of (A, B and D). Any subset of these three with C would make a super key for relation R. 2. (a) All the functional dependencies, in implied FD set can be derived using given set and hence all are valid.. (a) The canonical cover is {P Q, Q R} These two functional dependencies can functionality determine all the FD s of the relation. The number of FD s in the minimal cover is 2.. (b) This query counts the number of tuples with marks > minimum marks. All the tuples will have uniques marks. Hence only one tuple with minimum marks. Therefore 5 will be the result of the query (5 records will have marks greater than minimum marks). 5. (c) Maximum number of node at st level = Maximum number of node at 2 nd level = (because order is i.e., block pointers) Maximum number of node at rd level = = 6 Maximum number of node at th level = 6 = 6 Maximum number of node at 7 th level = 02 = 096 So total number of nodes = = (c) For B + tree, let n be the degree (n ) Key size + n Block pointer 52 (n ) n 52 6n = 520 n = is best choice 7. (b) Y is weak entity and hence existence dependent on X. More over Y does not have it s own key and combines it s partial key with key of strong entity in order to have a key. Every Y must appear in X i.e. total participation of Y is required in X. 8. (a) The output of Q and Q 2 would be same. This is because natural join ( ) has an implicit condition similar to condition (PSNGR.TNo = TRN.TNo), in Q for common attribute. The output of Q would contain tuples from both relations which does not satisfy the condition for natural join.
4 CT-208 CS DBMS 9 Output Q and Q 2 : Output of Q : Pass_Name TNo Type Suresh T SHA Anirudh T SHA Pass_Name TNo Type Suresh T SHA Anirudh T SHA Mallesham T NULL Shiva T NULL NULL T SFA NULL T EXP NULL T RAJ 2 9. (d) It is given that key size + Record pointer size = Record size This makes Blocks size Header Key + Record pointer = Index block factor = Blocks size Header Record size = Database file block factor 20. (b) In M : scenario, the relation will have unique values from the side with cardinality M. Hence when the relations are combined, the key attribute from M-cardinality relation will be the key of new relation. 2. (d) Both S and S 2 are false. S is false because relational algebra can only define DML operations. S 2 is false because relational calculus is declarative procedure. 22. (c) S is false because for set-difference operation, both relations must be union compatible. For performing any set operation on two or more relations, they must be compatible. 2. (b) S is false because if X Y is trivial FD then X Y. In S 2, for relation R candidate key s : AB, BC, CD, AD Prime attributes : A, B, C, D Relation in NF but not BCNF. 2. (c) A schedule is said to be irrecoverable if T i reads A which is updated by uncommitted T j and commit of T i is before T j. The given schedule does not have uncommitted read. So it is recoverable and cascadeless recoverable. 25. (b) According to 2PL, if lock conversion is allowed, then upgrading of locks must be done during expansion phase, and degrading of locks must be done in the shrinking phase. S 2 is true. Lock upgradation is not allowed in shrinking phase therefore S is False.
5 0 Computer Science & IT 26. (a) T T 2 Clearly we can see the cycle in precedence graph. Therefore this schedule S is not conflict equivalent to any serial schedule. T 27. (b) Even through the R and S may have common attributes it would give output as cross-product unless we give explicit condition for tuple matching. To make it equivalent to natural join we have to use WHERE condition to match the common attributes. 28. (c) The given query finds the pid s of parts that are supplied by atleast four suppliers. Inner query returns the count value and outer query checks whether the count value returned by the inner query is > or not. 29. (c) Update on Null gives Null Average function ignores Null values. Number of non-null entries = So, average will produce = (d) In level 2 there will be 0 nodes as order is 0. In level there will be 0 0 = 00 nodes In level there will be 0 00 = 000 nodes At level each node will have 9 record pointers. So, therefore the maximum number of records that be indexed are = 9000.
Database Management Systems Paper Solution
Database Management Systems Paper Solution Following questions have been asked in GATE CS exam. 1. Given the relations employee (name, salary, deptno) and department (deptno, deptname, address) Which of
More informationTechno India Batanagar Computer Science and Engineering. Model Questions. Subject Name: Database Management System Subject Code: CS 601
Techno India Batanagar Computer Science and Engineering Model Questions Subject Name: Database Management System Subject Code: CS 601 Multiple Choice Type Questions 1. Data structure or the data stored
More informationA7-R3: INTRODUCTION TO DATABASE MANAGEMENT SYSTEMS
A7-R3: INTRODUCTION TO DATABASE MANAGEMENT SYSTEMS NOTE: 1. There are TWO PARTS in this Module/Paper. PART ONE contains FOUR questions and PART TWO contains FIVE questions. 2. PART ONE is to be answered
More informationBabu Banarasi Das National Institute of Technology and Management
Babu Banarasi Das National Institute of Technology and Management Department of Computer Applications Question Bank (Short-to-Medium-Answer Type Questions) Masters of Computer Applications (MCA) NEW Syllabus
More informationDATABASE MANAGEMENT SYSTEM
DATABASE MANAGEMENT SYSTEM For COMPUTER SCIENCE DATABASE MANAGEMENT. SYSTEM SYLLABUS ER model. Relational model: relational algebra, tuple calculus, SQL. Integrity constraints, normal forms. File organization,
More informationDATABASE MANAGEMENT SYSTEMS
www..com Code No: N0321/R07 Set No. 1 1. a) What is a Superkey? With an example, describe the difference between a candidate key and the primary key for a given relation? b) With an example, briefly describe
More informationCS/B.Tech/CSE/New/SEM-6/CS-601/2013 DATABASE MANAGEMENENT SYSTEM. Time Allotted : 3 Hours Full Marks : 70
CS/B.Tech/CSE/New/SEM-6/CS-601/2013 2013 DATABASE MANAGEMENENT SYSTEM Time Allotted : 3 Hours Full Marks : 70 The figures in the margin indicate full marks. Candidates are required to give their answers
More informationCMSC 461 Final Exam Study Guide
CMSC 461 Final Exam Study Guide Study Guide Key Symbol Significance * High likelihood it will be on the final + Expected to have deep knowledge of can convey knowledge by working through an example problem
More informationQ.2 e) Time stamping protocol for concurrrency control Time stamping ids a concurrency protocol in which the fundamental goal is to order transactions globally in such a way that older transactions get
More informationData about data is database Select correct option: True False Partially True None of the Above
Within a table, each primary key value. is a minimal super key is always the first field in each table must be numeric must be unique Foreign Key is A field in a table that matches a key field in another
More informationNorthern India Engineering College, New Delhi Question Bank Database Management System. B. Tech. Mechanical & Automation Engineering V Semester
1. List four significant differences between a file-processing system and a DBMS. 2. Explain the difference between physical and logical data independence. 3. What are five main functions of a database
More informationQUIZ 1 REVIEW SESSION DATABASE MANAGEMENT SYSTEMS
QUIZ 1 REVIEW SESSION DATABASE MANAGEMENT SYSTEMS SCHEMA DESIGN & RELATIONAL ALGEBRA A database schema is the skeleton structure that represents the logical view of the entire database Logical design of
More informationDelhi Noida Bhopal Hyderabad Jaipur Lucknow Indore Pune Bhubaneswar Kolkata Patna Web: Ph:
Serial : 1PT_CS_A+C_Programming & Data Structure_230918 Delhi Noida Bhopal Hyderabad Jaipur Lucknow Indore Pune Bhubaneswar Kolkata Patna Web: E-mail: info@madeeasy.in Ph: 011-45124612 CLASS TEST 2018-19
More informationDatabase Management Systems (Classroom Practice Booklet Solutions)
Database Management Systems (Classroom Practice Booklet Solutions) 2. ER and Relational Model 4 ssn cid 01. Ans: (b) Professor Teaches course 02. Ans: (c) Sol: Because each patient is admitted into one
More informationSYED AMMAL ENGINEERING COLLEGE
UNIT-I INTRODUCTION TO DBMS CS6302- Database Management Systems Two Marks 1. What is database? A database is logically coherent collection of data with some inherent meaning, representing some aspect of
More informationSankalchand Patel College of Engineering, Visnagar B.E. Semester III (CE/IT) Database Management System Question Bank / Assignment
Sankalchand Patel College of Engineering, Visnagar B.E. Semester III (CE/IT) Database Management System Question Bank / Assignment Introductory concepts of DBMS 1. Explain detailed 3-level architecture
More informationCS6302 DBMS 2MARK & 16 MARK UNIT II SQL & QUERY ORTIMIZATION 1. Define Aggregate Functions in SQL? Aggregate function are functions that take a collection of values as input and return a single value.
More informationDatabase Management Systems (Solutions for Vol 1_Classroom Practice Questions)
Database Management Systems (Solutions for Vol 1_Classroom Practice Questions) 2. ER and Relational Model 01. Ans: (b) 07. Ans: 1 ssn cid Derived attribute is an attribute that derives its value from one
More informationRajiv GandhiCollegeof Engineering& Technology, Kirumampakkam.Page 1 of 10
Rajiv GandhiCollegeof Engineering& Technology, Kirumampakkam.Page 1 of 10 RAJIV GANDHI COLLEGE OF ENGINEERING & TECHNOLOGY, KIRUMAMPAKKAM-607 402 DEPARTMENT OF COMPUTER SCIENCE & ENGINEERING QUESTION BANK
More informationMIDTERM EXAMINATION Spring 2010 CS403- Database Management Systems (Session - 4) Ref No: Time: 60 min Marks: 38
Student Info StudentID: Center: ExamDate: MIDTERM EXAMINATION Spring 2010 CS403- Database Management Systems (Session - 4) Ref No: 1356458 Time: 60 min Marks: 38 BC080402322 OPKST 5/28/2010 12:00:00 AM
More informationIntro to Transactions
Reading Material CompSci 516 Database Systems Lecture 14 Intro to Transactions [RG] Chapter 16.1-16.3, 16.4.1 17.1-17.4 17.5.1, 17.5.3 Instructor: Sudeepa Roy Acknowledgement: The following slides have
More informationDATABASE MANAGEMENT SYSTEM SHORT QUESTIONS. QUESTION 1: What is database?
DATABASE MANAGEMENT SYSTEM SHORT QUESTIONS Complete book short Answer Question.. QUESTION 1: What is database? A database is a logically coherent collection of data with some inherent meaning, representing
More informationDelhi Noida Bhopal Hyderabad Jaipur Lucknow Indore Pune Bhubaneswar Kolkata Patna Web: Ph:
Serial : 1. PT_CS_A_Computer Organization_230418 Delhi Noida Bhopal Hyderabad Jaipur Lucknow Indore Pune Bhubaneswar Kolkata Patna Web: E-mail: info@madeeasy.in Ph: 011-45124612 CLASS TEST 2018-19 COMPUTER
More informationROEVER ENGINEERING COLLEGE
ROEVER ENGINEERING COLLEGE ELAMBALUR, PERAMBALUR- 621 212 DEPARTMENT OF INFORMATION TECHNOLOGY DATABASE MANAGEMENT SYSTEMS UNIT-1 Questions And Answers----Two Marks 1. Define database management systems?
More informationDelhi Noida Bhopal Hyderabad Jaipur Lucknow Indore Pune Bhubaneswar Kolkata Patna Web: Ph:
Serial : 2BS_CS_C_Computer Orgnisation_248 Delhi Noida Bhopal Hyderabad Jaipur Lucknow Indore Pune Bhubaneswar Kolkata Patna Web: E-mail: info@madeeasy.in Ph: -452462 CLASS TEST 28- COMPUTER SCIENCE &
More informationSQL Interview Questions
SQL Interview Questions SQL stands for Structured Query Language. It is used as a programming language for querying Relational Database Management Systems. In this tutorial, we shall go through the basic
More informationA can be implemented as a separate process to which transactions send lock and unlock requests The lock manager replies to a lock request by sending a lock grant messages (or a message asking the transaction
More informationConceptual (high-level, semantic)/ Physical (low-level, internal)/ Implementation (representational)
DB Systems, Lecture 01 Data: facts that can be recorded Information: data with meaning Knowledge: information and its application Mini-World: the part of the real world we are interested in Database: a
More informationCSCE 4523 Introduction to Database Management Systems Final Exam Fall I have neither given, nor received,unauthorized assistance on this exam.
CSCE 4523 Introduction to Database Management Systems Final Exam Fall 2016 I have neither given, nor received,unauthorized assistance on this exam. Signature Printed Name: Attempt all of the following
More informationVIEW OTHER QUESTION PAPERS
VIEW OTHER QUESTION PAPERS E B4E0562 Reg No.: Name: Total Pages: 2 APJ ABDUL KALAM TECHNOLOGICAL UNIVERSITY FOURTH SEMESTER B.TECH DEGREE EXAMINATION, JULY 2017 Course Code: CS208 Course Name: PRINCIPLES
More informationCS 564 Final Exam Fall 2015 Answers
CS 564 Final Exam Fall 015 Answers A: STORAGE AND INDEXING [0pts] I. [10pts] For the following questions, clearly circle True or False. 1. The cost of a file scan is essentially the same for a heap file
More informationIntro to DB CHAPTER 15 TRANSACTION MNGMNT
Intro to DB CHAPTER 15 TRANSACTION MNGMNT Chapter 15: Transactions Transaction Concept Transaction State Implementation of Atomicity and Durability Concurrent Executions Serializability Recoverability
More informationTransaction Management: Introduction (Chap. 16)
Transaction Management: Introduction (Chap. 16) CS634 Class 14 Slides based on Database Management Systems 3 rd ed, Ramakrishnan and Gehrke What are Transactions? So far, we looked at individual queries;
More informationIn This Lecture. Exam revision. Main topics. Exam format. Particular topics. How to revise. Exam format Main topics How to revise
In This Lecture Exam format Main topics How to revise Database Systems Lecture 18 Natasha Alechina Exam format Answer three questions out of five Each question is worth 25 points I will only mark three
More informationSYED AMMAL ENGINEERING COLLEGE
CS6302- Database Management Systems QUESTION BANK UNIT-I INTRODUCTION TO DBMS 1. What is database? 2. Define Database Management System. 3. Advantages of DBMS? 4. Disadvantages in File Processing System.
More informationDelhi Noida Bhopal Hyderabad Jaipur Lucknow Indore Pune Bhubaneswar Kolkata Patna Web: Ph:
Serial : BS_CS_A_Computer Network_040 Delhi Noida Bhopal Hyderabad Jaipur Lucknow Indore Pune Bhubaneswar Kolkata Patna Web: E-mail: info@madeeasy.in Ph: 0-45242 CLASS TEST 20-9 COMPUTER SCIENCE & IT Subject
More informationChapter 7 (Cont.) Transaction Management and Concurrency Control
Chapter 7 (Cont.) Transaction Management and Concurrency Control In this chapter, you will learn: What a database transaction is and what its properties are What concurrency control is and what role it
More informationL i (A) = transaction T i acquires lock for element A. U i (A) = transaction T i releases lock for element A
Lock-Based Scheduler Introduction to Data Management CSE 344 Lecture 20: Transactions Simple idea: Each element has a unique lock Each transaction must first acquire the lock before reading/writing that
More informationTransactions. Transaction. Execution of a user program in a DBMS.
Transactions Transactions Transaction Execution of a user program in a DBMS. Transactions Transaction Execution of a user program in a DBMS. Transaction properties Atomicity: all-or-nothing execution Consistency:
More informationDATABASE DESIGN I - 1DL300
DATABASE DESIGN I - 1DL300 Spring 2011 An introductory course on database systems http://www.it.uu.se/edu/course/homepage/dbastekn/vt11/ Manivasakan Sabesan Uppsala Database Laboratory Department of Information
More informationWhat are Transactions? Transaction Management: Introduction (Chap. 16) Major Example: the web app. Concurrent Execution. Web app in execution (CS636)
What are Transactions? Transaction Management: Introduction (Chap. 16) CS634 Class 14, Mar. 23, 2016 So far, we looked at individual queries; in practice, a task consists of a sequence of actions E.g.,
More informationGoal of Concurrency Control. Concurrency Control. Example. Solution 1. Solution 2. Solution 3
Goal of Concurrency Control Concurrency Control Transactions should be executed so that it is as though they executed in some serial order Also called Isolation or Serializability Weaker variants also
More informationChapter 2: Intro to Relational Model
Non è possibile visualizzare l'immagine. Chapter 2: Intro to Relational Model Database System Concepts, 6 th Ed. See www.db-book.com for conditions on re-use Example of a Relation attributes (or columns)
More informationCT13 DATABASE MANAGEMENT SYSTEMS DEC 2015
Q.1 a. Explain the role of concurrency control software in DBMS with an example. Answer: Concurrency control software in DBMS ensures that several users trying to update the same data do so in a controlled
More informationCS2255 DATABASE MANAGEMENT SYSTEMS QUESTION BANK UNIT I
CS2255 DATABASE MANAGEMENT SYSTEMS CLASS: II YEAR CSE SEM:04 STAFF INCHARGE: Mr S.GANESH,AP/CSE QUESTION BANK UNIT I 2 MARKS List the purpose of Database System (or) List the drawback of normal File Processing
More informationCSE 444: Database Internals. Lectures Transactions
CSE 444: Database Internals Lectures 13-14 Transactions CSE 444 - Spring 2014 1 Announcements Lab 2 is due TODAY Lab 3 will be released today, part 1 due next Monday HW4 is due on Wednesday HW3 will be
More informationFinal Exam. December 5th, :00-4:00. CS425 - Database Organization Results
Name CWID Final Exam December 5th, 2016 2:00-4:00 CS425 - Database Organization Results Please leave this empty! 1.1 1.2 1.3 1.4 1.5 1.6 Sum Instructions Try to answer all the questions using what you
More informationRelational Model and Relational Algebra A Short Review Class Notes - CS582-01
Relational Model and Relational Algebra A Short Review Class Notes - CS582-01 Tran Cao Son January 12, 2002 0.1 Basics The following definitions are from the book [1] Relational Model. Relations are tables
More informationA7-R3: INTRODUCTION TO DATABASE MANAGEMENT SYSTEMS
A7-R3: INTRODUCTION TO DATABASE MANAGEMENT SYSTEMS NOTE: 1. There are TWO PARTS in this Module/Paper. PART ONE contains FOUR questions and PART TWO contains FIVE questions. 2. PART ONE is to be answered
More informationMotivating Example. Motivating Example. Transaction ROLLBACK. Transactions. CSE 444: Database Internals
CSE 444: Database Internals Client 1: SET money=money-100 WHERE pid = 1 Motivating Example Client 2: SELECT sum(money) FROM Budget Lectures 13 Transaction Schedules 1 SET money=money+60 WHERE pid = 2 SET
More informationCS403- Database Management Systems Solved MCQS From Midterm Papers. CS403- Database Management Systems MIDTERM EXAMINATION - Spring 2010
CS403- Database Management Systems Solved MCQS From Midterm Papers April 29,2012 MC100401285 Moaaz.pk@gmail.com Mc100401285@gmail.com PSMD01 CS403- Database Management Systems MIDTERM EXAMINATION - Spring
More informationTransactions and Concurrency Control
Transactions and Concurrency Control Transaction: a unit of program execution that accesses and possibly updates some data items. A transaction is a collection of operations that logically form a single
More informationDatabase Principles: Fundamentals of Design, Implementation, and Management Tenth Edition. Chapter 13 Managing Transactions and Concurrency
Database Principles: Fundamentals of Design, Implementation, and Management Tenth Edition Chapter 13 Managing Transactions and Concurrency Objectives In this chapter, you will learn: What a database transaction
More informationDatabase Tuning and Physical Design: Execution of Transactions
Database Tuning and Physical Design: Execution of Transactions Spring 2018 School of Computer Science University of Waterloo Databases CS348 (University of Waterloo) Transaction Execution 1 / 20 Basics
More informationReferences. Transaction Management. Database Administration and Tuning 2012/2013. Chpt 14 Silberchatz Chpt 16 Raghu
Database Administration and Tuning 2012/2013 Transaction Management Helena Galhardas DEI@Técnico DMIR@INESC-ID Chpt 14 Silberchatz Chpt 16 Raghu References 1 Overall DBMS Structure Transactions Transaction
More informationIntroduction to Database Systems. Announcements CSE 444. Review: Closure, Key, Superkey. Decomposition: Schema Design using FD
Introduction to Database Systems CSE 444 Lecture #9 Jan 29 2001 Announcements Mid Term on Monday (in class) Material in lectures Textbook Chapter 1.1, Chapter 2 (except 2.1 and ODL), Chapter 3 (except
More informationFinal Review. May 9, 2018 May 11, 2018
Final Review May 9, 2018 May 11, 2018 1 SQL 2 A Basic SQL Query (optional) keyword indicating that the answer should not contain duplicates SELECT [DISTINCT] target-list A list of attributes of relations
More informationDatabase Management
Database Management - 2011 Model Answers 1. a. A data model should comprise a structural part, an integrity part and a manipulative part. The relational model provides standard definitions for all three
More informationCSE 444, Winter 2011, Midterm Examination 9 February 2011
Name: CSE 444, Winter 2011, Midterm Examination 9 February 2011 Rules: Open books and open notes. No laptops or other mobile devices. Please write clearly. Relax! You are here to learn. An extra page is
More informationConcurrency Control & Recovery
Transaction Management Overview CS 186, Fall 2002, Lecture 23 R & G Chapter 18 There are three side effects of acid. Enhanced long term memory, decreased short term memory, and I forget the third. - Timothy
More informationFinal Review. May 9, 2017
Final Review May 9, 2017 1 SQL 2 A Basic SQL Query (optional) keyword indicating that the answer should not contain duplicates SELECT [DISTINCT] target-list A list of attributes of relations in relation-list
More informationIntro to Transaction Management
Intro to Transaction Management CMPSCI 645 May 3, 2006 Gerome Miklau Slide content adapted from Ramakrishnan & Gehrke, Zack Ives 1 Concurrency Control Concurrent execution of user programs is essential
More informationDatabase Systems. Announcement
Database Systems ( 料 ) December 27/28, 2006 Lecture 13 Merry Christmas & New Year 1 Announcement Assignment #5 is finally out on the course homepage. It is due next Thur. 2 1 Overview of Transaction Management
More information1. (a) Explain the Transaction management in a database. (b) Discuss the Query Processor of Database system structure. [8+8]
Code No: R059210506 Set No. 1 1. (a) Explain the Transaction management in a database. (b) Discuss the Query Processor of Database system structure. [8+8] 2. (a) What is an unsafe query? Give an example
More informationTransaction Management and Concurrency Control. Chapter 16, 17
Transaction Management and Concurrency Control Chapter 16, 17 Instructor: Vladimir Zadorozhny vladimir@sis.pitt.edu Information Science Program School of Information Sciences, University of Pittsburgh
More informationRelational model continued. Understanding how to use the relational model. Summary of board example: with Copies as weak entity
COS 597A: Principles of Database and Information Systems Relational model continued Understanding how to use the relational model 1 with as weak entity folded into folded into branches: (br_, librarian,
More informationCSCE 4523 Introduction to Database Management Systems Final Exam Spring I have neither given, nor received,unauthorized assistance on this exam.
CSCE 4523 Introduction to Database Management Systems Final Exam Spring 2017 I have neither given, nor received,unauthorized assistance on this exam. Signature Printed Name: Attempt all of the following
More informationSolutions to Final Examination
Prof. Li-Yan Yuan CMPUT 391: Database Management Systems Solutions to Final Examination April 23, 2007 It is a close-book examination and the time for the test is 120 minutes. There are ten (10) questions
More informationDatabase Applications (15-415)
Database Applications (15-415) DBMS Internals- Part XI Lecture 19, April 2, 2014 Mohammad Hammoud Today Last Session: DBMS Internals- Part IX Query Optimization (Cont d) A Very Brief Introduction to Transaction
More informationDelhi Noida Bhopal Hyderabad Jaipur Lucknow Indore Pune Bhubaneswar Kolkata Patna Web: Ph:
Serial : LS2_EE_S_Microprocessors_2688 Delhi Noida Bhopal Hyderabad Jaipur Lucknow Indore Pune Bhubaneswar Kolkata Patna Web: E-mail: info@madeeasy.in Ph: -452462 CLASS TEST 28-9 ELECTRICAL ENGINEERING
More informationRelational Model, Relational Algebra, and SQL
Relational Model, Relational Algebra, and SQL August 29, 2007 1 Relational Model Data model. constraints. Set of conceptual tools for describing of data, data semantics, data relationships, and data integrity
More informationNormalization. Murali Mani. What and Why Normalization? To remove potential redundancy in design
1 Normalization What and Why Normalization? To remove potential redundancy in design Redundancy causes several anomalies: insert, delete and update Normalization uses concept of dependencies Functional
More informationINSTITUTE OF AERONAUTICAL ENGINEERING (Autonomous) Dundigal, Hyderabad
INSTITUTE OF AERONAUTICAL ENGINEERING (Autonomous) Dundigal, Hyderabad - 500 043 COMPUTER SCIENCE AND ENGINEERING DEFINITIONS AND TERMINOLOGY Course Name : DATABASE MANAGEMENT SYSTEM Course Code : ACS005
More informationChapter 2: Intro to Relational Model
Chapter 2: Intro to Relational Model Database System Concepts, 6 th Ed. See www.db-book.com for conditions on re-use Example of a Relation attributes (or columns) tuples (or rows) 2.2 Attribute Types The
More informationDHANALAKSHMI COLLEGE OF ENGINEERING, CHENNAI
DHANALAKSHMI COLLEGE OF ENGINEERING, CHENNAI Department of Computer Science and Engineering CS6302- DATABASE MANAGEMENT SYSTEMS Anna University 2 & 16 Mark Questions & Answers Year / Semester: II / III
More informationCSE 444: Database Internals. Lectures 13 Transaction Schedules
CSE 444: Database Internals Lectures 13 Transaction Schedules CSE 444 - Winter 2018 1 About Lab 3 In lab 3, we implement transactions Focus on concurrency control Want to run many transactions at the same
More informationIntroduction to Data Management CSE 344
Introduction to Data Management CSE 344 Lecture 22: More Transaction Implementations 1 Review: Schedules, schedules, schedules The DBMS scheduler determines the order of operations from txns are executed
More informationCS403- Database Management Systems Solved Objective Midterm Papers For Preparation of Midterm Exam
CS403- Database Management Systems Solved Objective Midterm Papers For Preparation of Midterm Exam Question No: 1 ( Marks: 1 ) - Please choose one Which of the following is NOT a feature of Context DFD?
More informationDatabase Management Systems Written Examination
Database Management Systems Written Examination 14.02.2007 First name Student number Last name Signature Instructions for Students Write your name, student number, and signature on the exam sheet. Write
More information1. (a) Briefly explain the Database Design process. (b) Define these terms: Entity, Entity set, Attribute, Key. [7+8] FIRSTRANKER
Code No: R09220502 R09 Set No. 2 1. (a) Briefly explain the Database Design process. (b) Define these terms: Entity, Entity set, Attribute, Key. [7+8] 2. Explain schema refinement in Database Design? [15]
More informationChapter 22. Transaction Management
Chapter 22 Transaction Management 1 Transaction Support Transaction Action, or series of actions, carried out by user or application, which reads or updates contents of database. Logical unit of work on
More informationAnnouncements. Transaction. Motivating Example. Motivating Example. Transactions. CSE 444: Database Internals
Announcements CSE 444: Database Internals Lab 2 is due TODAY Lab 3 will be released tomorrow, part 1 due next Monday Lectures 13 Transaction Schedules CSE 444 - Spring 2015 1 HW4 is due on Wednesday HW3
More informationUNIT 3 DATABASE DESIGN
UNIT 3 DATABASE DESIGN Objective To study design guidelines for relational databases. To know about Functional dependencies. To have an understanding on First, Second, Third Normal forms To study about
More informationCS 5300 module6. Problem #1 (10 Points) a) Consider the three transactions T1, T2, and T3, and the schedules S1 and S2.
Name CS 5300 module6 Student ID Problem #1 (10 Points) a) Consider the three transactions T1, T2, and T3, and the schedules S1 and S2. T1: r1(x); r1(z); w1(x); T2: r2(y); r2(z); w2(y); T3: w3(x); r3(y);
More informationRelational Database Management System 2014
Unit-1: Procedural SQL data types Fill in the blank: 1. are used to defining a fully relational database. 2. Data can be presented to the user in different logical combinations, called. 3. Changes to the
More informationUnit 2. Unit 3. Unit 4
Course Objectives At the end of the course the student will be able to: 1. Differentiate database systems from traditional file systems by enumerating the features provided by database systems.. 2. Design
More informationDatabases - Transactions II. (GF Royle, N Spadaccini ) Databases - Transactions II 1 / 22
Databases - Transactions II (GF Royle, N Spadaccini 2006-2010) Databases - Transactions II 1 / 22 This lecture This lecture discusses how a DBMS schedules interleaved transactions to avoid the anomalies
More informationDelhi Noida Bhopal Hyderabad Jaipur Lucknow Indore Pune Bhubaneswar Kolkata Patna Web: Ph:
Serial :. PT_EE-EC_A_Microprocessor_968 Delhi Noida Bhopal Hyderabad Jaipur Lucknow Indore Pune Bhubaneswar Kolkata Patna Web: E-mail: info@madeeasy.in Ph: -452462 CLASS TEST 28-9 Subject : Microprocessors
More informationBachelor in Information Technology (BIT) O Term-End Examination
No. of Printed Pages : 6 I CSI-14 I Bachelor in Information Technology (BIT) O Term-End Examination cn Cn1 June, 2010 CD cp CSI-14 : DATA ANALYSIS AND DATABASE DESIGN Time : 3 hours Maximum Marks : 75
More informationIntroduction to Query Processing and Query Optimization Techniques. Copyright 2011 Ramez Elmasri and Shamkant Navathe
Introduction to Query Processing and Query Optimization Techniques Outline Translating SQL Queries into Relational Algebra Algorithms for External Sorting Algorithms for SELECT and JOIN Operations Algorithms
More informationII B.Sc(IT) [ BATCH] IV SEMESTER CORE: RELATIONAL DATABASE MANAGEMENT SYSTEM - 412A Multiple Choice Questions.
Dr.G.R.Damodaran College of Science (Autonomous, affiliated to the Bharathiar University, recognized by the UGC)Re-accredited at the 'A' Grade Level by the NAAC and ISO 9001:2008 Certified CRISL rated
More informationAnnouncements. Motivating Example. Transaction ROLLBACK. Motivating Example. CSE 444: Database Internals. Lab 2 extended until Monday
Announcements CSE 444: Database Internals Lab 2 extended until Monday Lab 2 quiz moved to Wednesday Lectures 13 Transaction Schedules HW5 extended to Friday 544M: Paper 3 due next Friday as well CSE 444
More informationELECTRICAL ENGINEERING
Serial : 1. JP_EE_Microprocessor_130618 CLASS TEST Delhi Noida Bhopal Hyderabad Jaipur Lucknow Indore Pune Bhubaneswar Kolkata Patna Web: E-mail: info@madeeasy.in Ph: 011-45124612 ELECTRICAL ENGINEERING
More informationGoals for Today. CS 133: Databases. Final Exam: Logistics. Why Use a DBMS? Brief overview of course. Course evaluations
Goals for Today Brief overview of course CS 133: Databases Course evaluations Fall 2018 Lec 27 12/13 Course and Final Review Prof. Beth Trushkowsky More details about the Final Exam Practice exercises
More informationFunctional Dependencies and Normalization
Functional Dependencies and Normalization Jose M. Peña jose.m.pena@liu.se Overview Real world Databases DBMS Model Physical database Queries Processing of queries and updates Access to stored data Answers
More informationCSE344 Final Exam Winter 2017
CSE344 Final Exam Winter 2017 March 16, 2017 Please read all instructions (including these) carefully. This is a closed book exam. You are allowed two pages of note sheets that you can write on both sides.
More informationCSE 190D Spring 2017 Final Exam Answers
CSE 190D Spring 2017 Final Exam Answers Q 1. [20pts] For the following questions, clearly circle True or False. 1. The hash join algorithm always has fewer page I/Os compared to the block nested loop join
More informationCSE 190D Database System Implementation
CSE 190D Database System Implementation Arun Kumar Topic 6: Transaction Management Chapter 16 of Cow Book Slide ACKs: Jignesh Patel 1 Transaction Management Motivation and Basics The ACID Properties Transaction
More informationMaanavaN.Com DEPARTMENT OF COMPUTER SCIENCE & ENGINEERING QUESTION BANK
CS1301 DATABASE MANAGEMENT SYSTEM DEPARTMENT OF COMPUTER SCIENCE & ENGINEERING QUESTION BANK Sub code / Subject: CS1301 / DBMS Year/Sem : III / V UNIT I INTRODUCTION AND CONCEPTUAL MODELLING 1. Define
More informationRelational Database: The Relational Data Model; Operations on Database Relations
Relational Database: The Relational Data Model; Operations on Database Relations Greg Plaxton Theory in Programming Practice, Spring 2005 Department of Computer Science University of Texas at Austin Overview
More information