Database Management Systems
Textbook Exam Questions
Course Introduction
Database Management Systems is a foundational course that explores the principles, architecture, and management of databases in modern information systems. Students will learn about data models, relational databases, SQL query language, and database design methodologies. The course covers concepts such as normalization, transaction management, concurrency control, and data security. Students gain practical experience in designing, implementing, and querying databases, as well as understanding emerging trends like NoSQL and distributed databases. This course equips learners with the skills necessary to manage vast amounts of data efficiently, supporting robust applications and informed decision-making in various organizational settings.
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Concepts of Database Management 9th Edition by Joy
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Page 2
L. Starks
Chapter 1: Introduction to Database Management
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Q1) An entity is a person, place, object, event, or idea for which you want to store and process data.
A)True
B)False
Answer: True
Q2) Which type of rule ensures that changes made to the database do not result in a loss of data consistency?
A) redundancy constraint
B) integrity constraint
C) conflict requirement
D) security requirement
Answer: B
Q3) _________________________ describes the large volume of data produced by every digital process, system, sensor, mobile device, and even social media exchange.
Answer: Big data
Q4) Redundancy makes changing data more cumbersome and time-consuming.
A)True
B)False
Answer: True
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Chapter 2: The Relational Model 1: Introduction, QBE, and Relational Algebra
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Q1) Which command contains all rows that are common in two tables?
A) UNION
B) SUBTRACT
C) JOIN
D) INTERSECT
Answer: D
Q2) Which operator is used to concatenate every row in the first table with every row in the second table?
A) union
B) difference
C) product
D) intersection
Answer: C
Q3) What type of functions are Count, Sum, Avg, Max, and Min?
A) accumulation
B) allowed
C) primary
D) aggregate
Answer: D
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Chapter 3: The Relational Model 2: SQL
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Q1) You use the WHERE clause on groups and the HAVING clause on rows.
A)True
B)False
Answer: False
Q2) What command do you use to make changes to existing data in a table?
A) MODIFY
B) CHANGE
C) SELECT
D) UPDATE
Answer: D
Q3) The ____________________ data type stores integers in the range -32768 to 32767.
Answer: SMALLINT
Q4) Based on the code shown, which query lists the descriptions of all items that are not in Storehouse 3???Item (ItemNum, Description, OnHand, Category, Storehouse, Price )
A) SELECT Description FROM Customer WHERE NOT Storehouse='3' ;
B) SELECT Description FROM Item WHERE Storehouse='4' ;
C) SELECT Description FROM Item WHERE Storehouse>'3' ;
D) SELECT Description FROM Item WHERE NOT Storehouse='3' ;
Answer: D
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Chapter 4: The Relational Model 3: Advanced Topics
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Q1) Which command will create an application program's or individual user's picture of the database?
A) CREATE INDEX
B) SELECT INDEX
C) SELECT VIEW
D) CREATE VIEW
Q2) When you create a query that involves a view, the DBMS immediately executes the query you created.
A)True
B)False
Q3) What is the difference between entity integrity and referential integrity?
Q4) Which statement removes the table Category from a DBMS?
A) DELETE TABLE Category ;
B) DROP TABLE Category ;
C) REMOVE TABLE Category ;
D) RID TABLE Category ;
Q5) Within relational model systems on both mainframes and personal computers, the main mechanism for increasing the efficiency with which data is retrieved from the database is the ____________________.
Q6) Describe a client/server system and how it applies to stored procedures.
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Chapter 5: Database Design 1: Normalization
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Q1) Which term's definition also defines a candidate key?
A) functional key
B) repeating group
C) primary key
D) nonkey column
Q2) When the ____________________ of a table is a single column, the table is automatically in second normal form.
Q3) A(n) ________________ key is a candidate key not chosen ad the primary key.
Q4) Second normal form can be defined as a table that is in first normal form but that contains no ____.
A) partial dependencies
B) alternate keys
C) nonkey columns
D) interrelation constraints
Q5) The ____________________ process enables you to identify the existence of potential problems in the design of a database.
Q6) A table that contains a ________________ that is not a candidate key indicates the table is not in third normal form.
Q7) Discuss what normal forms are and list the most common normal forms.
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Chapter 6: Database Design 2: Design Method
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Q1) What is a column that you create for an entity to serve solely as the primary key and that is visible to users?
A) synthetic key
B) weak entity
C) artificial key
D) natural key
Q2) What is an entity that does not require a relationship to another entity for identification?
A) alternative entity
B) foreign entity
C) independent entity
D) single entity
Q3) To obtain information about ____________________ dependencies you might ask users questions such as: "If you know a particular employee number, can you establish other information, such as employee name?"
Q4) When the existence of one entity depends on the existence of another related entity, there is an existence ____________________.
Q5) On an E-R diagram, ____________________ entities have rounded corners.
Q6) Describe the different types of primary keys.
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Chapter 7: Dbms Functions
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Q1) In which procedure does the DBMS read the log for the problem transactions and apply the before images to undo their updates?
A) concurrent update
B) backward recovery
C) authentication
D) batch processing
Q2) ____________________ involves maintaining a log of all updates in the database.
Q3) You can minimize the occurrence of deadlocks by making sure all programs lock records in random order whenever possible.
A)True
B)False
Q4) Which process returns the database to a state that is known to be correct?
A) recovery
B) concurrent update
C) encryption
D) batch processing
Q5) A commit is a record of what the data in a row looked like before an update.
A)True
B)False
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Chapter 8: Database Administration
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Q1) When the primary key cannot be null, this is known as ____________________.
Q2) The data architect sets data-handling policies and assigns data entry.
A)True
B)False
Q3) QBE is an example of a procedural language.
A)True
B)False
Q4) Which of the following is a log of all database maintenance, with dates, license keys, issues or updates, involved personnel, and resolutions?
A) system journal
B) run-book
C) system catalog
D) DBMS log
Q5) A shared lock permits other users to read the data in the database.
A)True
B)False
Q6) A(n) ____________________ site is a backup site that is equipped with duplicate hardware and software but not data.
Q7) Describe a parallel database system.
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Chapter 9: Database Management Approaches
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Q1) An advantage of a distributed database is that the database can handle more complex query processing.
A)True
B)False
Q2) A local deadlock involves one transaction that requires a record held by a second transaction at one site, while the second transaction requires a record held by the first transaction at a different site.
A)True
B)False
Q3) Late binding lets you use the same name for different operations, which is called ____________________ in object-oriented systems.
Q4) The term domain refers to the general structure of an object.
A)True
B)False
Q5) Where does a user send a message to execute steps in a method?
A) to the method
B) to the object
C) to a class
D) to a subclass
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