Database Management Systems
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Course Introduction
Database Management Systems is a foundational course that introduces students to the principles, design, and implementation of modern database systems. The course covers key topics including data models, relational algebra, SQL, normalization, indexing, transactions, concurrency control, and database security. Students will gain hands-on experience in designing databases, creating and manipulating databases using SQL, and understanding the theoretical concepts that underpin efficient and reliable data storage, retrieval, and management. Emphasis is placed on the practical application of database technology to solve real-world problems and support data-driven decision making in a variety of organizational contexts.
Recommended Textbook
Database Systems Design Implementation and Management 9th Edition by Carlos Coronel
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Chapter 1: Database Systems
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Q1) Accurate,relevant,and timely information is the key to ____.
A) data management
B) good decision making
C) knowledge
D) understanding
Answer: B
Q2) A(n)____ database is designed to support a company's day-to-day operations.
A) desktop
B) workgroup
C) enterprise
D) transactional
Answer: D
Q3) Data processing can be as simple as organizing data to reveal patterns.
A)True
B)False
Answer: True
Q4) ____________________ exists when the same data are stored unnecessarily at different places.
Answer: Data redundancy
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Chapter 2: Data Models
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Q1) Students and classes have a ____ relationship.
A) one-to-one
B) one-to-many
C) many-to-one
D) many-to-many
Answer: D
Q2) ___________________________________ is a language based on OO concepts that describes a set of diagrams and symbols used to graphically model a system.
Answer: UML (Unified Modeling Language)
Unified Modeling Language (UML)
Unified Modeling Language
UML
Q3) Each row in the relational table is known as an entity instance or entity occurrence in the ER model.
A)True
B)False
Answer: True
Q4) Each row in a relation is called a(n)____________________.
Answer: tuple
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Chapter 3: The Relational Database Model
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Q1) Only a single attribute,not multiple attributes,can define functional dependence.
A)True
B)False
Answer: False
Q2) A CUSTOMER table's primary key is CUS_CODE.The CUSTOMER primary key column has no null entries,and all entries are unique.This is an example of ____ integrity.
A) entity
B) referential
C) complete
D) null
Answer: A
Q3) If one department chair-a professor-can chair only one department and one department can have only one department chair,then the entities PROFESSOR and DEPARTMENT exhibit a(n)____________________ relationship.
Answer: 1:1
Q4) In a relational table,each column has a specific range of values known as the ____________________ domain.
Answer: attribute
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Chapter 4: Entity Relationship (ER)Modeling
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Sample Questions
Q1) Attributes do not have a domain.
A)True
B)False
Q2) If an employee within an EMPLOYEE entity has a relationship with itself,that relationship is known as a ____ relationship.
A) self
B) self-referring
C) looping
D) recursive
Q3) In the ERD,cardinality is indicated using the ____ notation.
A) (max,min)
B) (min,max)
C) [min ...max]
D) {min|max}
Q4) A composite identifier is a primary key composed of more than one attribute.
A)True
B)False
Q5) The Crow's Foot model is less implementation-oriented than the Chen model.
A)True
B)False
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Chapter 5: Advanced Data Modeling
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Q1) The most important characteristic of an entity is its ____ key,used to uniquely identify each entity instance.
A) primary
B) natural
C) foreign
D) surrogate
Q2) A ____ key is a real-world,generally accepted identifier used to uniquely identify real-world objects.
A) primary
B) natural
C) foreign
D) surrogate
Q3) Entity supertypes and subtypes are organized in a specialization hierarchy.
A)True
B)False
Q4) Generalization is based on grouping unique characteristics and relationships of the subtypes.
A)True B)False
Q5) Explain the "no change over time" characteristic of a good primary key.
Page 7
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Chapter 6: Normalization of Database Tables
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Q1) A table that is in 2NF and contains no transitive dependencies is said to be in ____.
A) 1NF
B) 2NF
C) 3NF
D) 4NF
Q2) The combination of ____________________ and ER modeling yields a useful ERD,whose entities may now be translated into appropriate table structures.
Q3) From a strictly database point of view,____ attribute values can be calculated when they are needed to write reports or invoices.
A) derived
B) atomic
C) granular
D) historical
Q4) To generate a surrogate key,Microsoft Access uses a(n)____ data type.
A) surrogate
B) sequence
C) AutoNumber
D) identity
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Page 8
Chapter 7: Introduction to Structured Query Language (SQL)
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Q1) In a 1:M relationship,you must always create the table for the ____________________ side first.
Q2) The basic SQL vocabulary has fewer than ____________________ words.
Q3) A table can be deleted from the database by using the ____ command.
A) DROP TABLE
B) DELETE TABLE
C) MODIFY TABLE
D) ERASE TABLE
Q4) The SQL command that lets you insert rows into a table is ____.
A) INSERT
B) SELECT
C) COMMIT
D) UPDATE
Q5) When joining three or more tables,you need to specify a join condition for one pair of tables.
A)True
B)False
Q6) In SQL,all ____________________ expressions evaluate to true or false.
Q7) Using the ____________________ command,SQL indexes can be created on the basis of any selected attribute. Page 9
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Page 10
Chapter 8: Advanced SQL
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Q1) The ANSI standard defines ____ type(s)of outer join(s)
A) one
B) two
C) three
D) four
Q2) One of the disadvantages of stored procedures is that they increase network traffic.
A)True
B)False
Q3) Stored procedures must have at least one argument.
A)True
B)False
Q4) The ____________________ statement combines rows from two or more queries without including duplicate rows.
Q5) Every PL/SQL block must be given a name.
A)True
B)False
Q6) If the DBMS does not support the INTERSECT statement,you can use a(n)____________________ subquery to achieve the same result.
Q7) Describe the characteristics of an Oracle sequence.
Page 11
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Chapter 9: Database Design
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Q1) List and briefly describe the three types of system maintenance activities.
Q2) Decentralized design is typical of relatively simple and/or small databases and can be successfully done by a single person.
A)True
B)False
Q3) From a database point of view,the collection of data becomes meaningful only when the business ____________________ are defined.
Q4) The first step in the ER model verification process is to ____.
A) identify each module and its components
B) identify the ER model's central entity
C) verify all processes against the ER model
D) identify each module's internal transaction requirements
Q5) What are the classical approaches to database design?
Q6) A(n)____________________ log backup backs up only the transaction log operations that are not reflected in a previous backup copy of the database.
Q7) The first step in ____________________ design is to discover the data element characteristics.
Q8) What are the factors affecting the purchasing decision for DBMS software?
Page 12
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Chapter 10: Transaction Management and Concurrency Control
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Q1) Although the DBMS is designed to recover a database to a previous consistent state (when an interruption prevents the completion of a required set of transactions),the transactions themselves are defined by the end user or programmer and must be ____________________ correct.
Q2) The ____________________ interleaves the execution of database operations to ensure serializability.
Q3) ____________________ can take place at any of the following levels: database,table,page,row,or field.
Q4) A(n)____ lock has only two stages (0 and 1).
A) shared
B) exclusive C) binary
D) two-phase
Q5) Durability requires that all portions of the transaction must be treated as a single,logical unit of work in which all operations are applied and completed to produce a consistent database.
A)True
B)False
Q6) What are the three basic techniques to control deadlocks?
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Chapter 11: Database Performance Tuning and Query
Optimization
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Q1) The SQL cache stores the end-user written SQL.
A)True
B)False
Q2) Most current-generation relational DBMSs perform automatic query optimization at the client end.
A)True
B)False
Q3) All transaction management commands are processed during the parsing and execution phases of query processing.
A)True
B)False
Q4) A DBA determines the initial size of the data files that make up the database; however,as required,the data files can automatically expand in predefined increments known as ____.
A) procedure cache
B) file group
C) data files
D) extends
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Q5) ____________________ is a measure of how likely an index will be used in query processing.
Chapter 12: Distributed Database Management Systems
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Q1) A fully distributed database management system must perform all of the functions of a centralized DBMS.What are these functions?
Q2) ____ transparency allows a distributed database to be treated as a single logical database.
A) Distribution
B) Transaction
C) Failure
D) Performance
Q3) A distributed database system requires functional characteristics that can be grouped and described as transparency features.
A)True
B)False
Q4) ____ query optimization means that the DDBMS finds the most cost-effective access path without user intervention.
A) Static
B) Dynamic
C) Automatic
D) Commit
Q5) A user-friendly ____________________ is one advantage of a DDBMS.
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Chapter 13: Business Intelligence and Data Warehouses
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Q1) To provide better performance,some OLAP systems merge the data warehouse and data mart approaches by storing small extracts of the data warehouse at end-user workstations.
A)True
B)False
Q2) It is a relatively easy task to provide a precise list of characteristics of data-mining tools.
A)True
B)False
Q3) ____ splits a table into subsets of rows or columns and places the subsets close to the client computer to improve data access time.
A) Normalization
B) Meta modeling
C) Replication
D) Partitioning
Q4) ____________________ is a method or process of government.
Q5) Because a data cube's dimensions are predefined,all cells are populated. A)True
B)False
Q6) Describe the use of SQL in relation to ROLAP.
Page 16
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Chapter 14: Database Connectivity and Web Technologies
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Q1) Every XML document has a ____.
A) root element
B) base tag
C) schema
D) DTD
Q2) Which of the following is a well-established Web server API?
A) CGIAPI
B) WSAPI
C) INPAPI
D) MWWAPI
Q3) An API (application programming interface)is defined as a set of routines,protocols,and tools for building software applications.
A)True
B)False
Q4) The ____ is the most specialized object in the ADO.NET framework.
A) Command
B) DataReader
C) DataAdapter
D) DataSet
Q5) ____________________ Web pages are at the heart of current generation Web sites.
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Chapter 15: Database Administration and Security
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Q1) The allocation of storage resources is determined when the DBMS is created.
A)True
B)False
Q2) The advent of the DBMS and its shared view of data produced a new level of data management sophistication and led the DP department to evolve into a(n)_________________________ department.
Q3) A(n)____ serves as the basis for planning,development,and control of future information systems
A) access plan
B) active data dictionary
C) information systems architecture (ISA)
D) security policy
Q4) The end user must provide testing and evaluation services for all the database and DBA applications.
A)True
B)False
Q5) The requirement that a password must have a maximum of 12 characters is an example of a(n)____________________.
Q6) Describe the need for convenient and safe backup storage.
Page 18
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