Introduction to Databases Practice Exam
Course Introduction
Introduction to Databases explores the fundamental concepts, principles, and techniques used in the design, implementation, and management of database systems. The course covers topics such as data models, relational databases, SQL (Structured Query Language), database normalization, indexing, transactions, and data integrity. Students will gain hands-on experience in constructing and querying databases, understanding the role of databases in modern applications, and addressing issues related to data consistency, security, and scalability. By the end of the course, students will be equipped with practical skills and theoretical knowledge necessary for effective database design and management.
Recommended Textbook
Database Principles Fundamentals of Design Implementation and Management international 10th
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Chapter 1: The Database Approach
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Sample Questions
Q1) A ____ database supports data distributed across several different sites.
A) single-user
B) multiuser
C) centralized
D) distributed
Answer: D
Q2) ____________________ is the result of processing raw data to reveal its meaning.
Answer: Information
Q3) Data ____________________ is a discipline that focuses on proper generation, storage and retrieval of data.
Answer: management
Q4) ____ data exist in the format in which they were collected.
A) Structured
B) Semistructured
C) Unstructured
D) Historical
Answer: C
Q5) Raw data must be properly ____________________ for storage, processing and presentation.
Answer: Falseormatted
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Chapter 2: Database Development Process
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Sample Questions
Q1) The ____ design is the process of selecting the data storage and data access characteristics of the database.
A) time
B) network
C) logical
D) physical
Answer: D
Q2) The conceptual design step that identifies ER modules and validates insert, update, and delete rules is ____.
A) database analysis and requirements
B) ER modeling and normalization
C) data-model verification
D) distributed database design
Answer: C
Q3) Installation and fine tuning are part of the ____ phase of the SDLC.
A) planning
B) analysis
C) detailed systems design
D) implementation
Answer: D
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Chapter 3: Data Models
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Sample Questions
Q1) A verb associating two nouns in a business rule translates to a(n) ____ in the data model.
A) entity
B) attribute
C) relationship
D) constraint
Answer: C
Q2) Within the database environment, a data model represents data structures with the purpose of supporting a specific problem domain.
A)True
B)False
Answer: True
Q3) Business rules must be rendered in writing.
A)True
B)False
Answer: True
Q4) In an SQL-based relational database, each table is dependent on another.
A)True
B)False
Answer: False
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Chapter 4: Relational Model Characteristics
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Sample Questions
Q1) ____________________ relationships can be implemented by creating a new entity in 1:M relationships with the original entities.
Q2) A data dictionary is sometimes described as "the database designer's database" because it records the design decisions about tables and their structures.
A)True
B)False
Q3) Depending on the sophistication of the application development software, nulls can create problems when functions such as COUNT, AVERAGE, and SUM are used.
A)True
B)False
Q4) The SELECT operator yields a vertical subset of a table.
A)True
B)False
Q5) No data entry at all is known as a(n) ____.
A) nil
B) null
C) empty
D) zero
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Chapter 5: Beginning Structured Query Language Sql
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Sample Questions
Q1) To delete a row from the PRODUCT table, use the ____ command.
A) COMMIT
B) DELETE
C) ERASE
D) KILL
Q2) Only numeric data types can be added and subtracted in SQL.
A)True
B)False
Q3) If you have not yet used the COMMIT command to store the changes permanently in the database, you can restore the database to its previous condition with the ROLLBACK command.
A)True
B)False
Q4) To delete an index, use the ____________________ command.
Q5) To join tables, simply enumerate the tables in the FROM clause of the SELECT statement. The DBMS will create a Cartesian product of every table in the FROM clause. To get the correct results, you need to select the rows in which the common attribute values do not match.
A)True
B)False
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Chapter 6: Procedural Language Sql and Advanced Sql
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Q1) In an Oracle sequence, the ____________________ pseudo-column retrieves the current value of a sequence.
Q2) The use of the ____________________ operator allows you to compare a single value with a list of values returned by the first subquery (sqA) using a comparison operator other than EQUALS.
Q3) A(n) ____________________ view is a view that can be used to update attributes in the base table(s) that are used in the view.
Q4) A row-level trigger requires use of the ____________________ keywords. This type of trigger is executed once for each row affected by the triggering statement.
Q5) A(n) ____________________ routine pools multiple transactions into a single batch to update a master table field in a single operation.
Q6) PL/SQL blocks have a section used to declare variables. A)True B)False
Q7) One of the disadvantages of stored procedures is that they increase network traffic. A)True B)False
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Chapter 7: Data Modeling With Entity Relationship
Diagrams
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Sample Questions
Q1) A recursive relationship is one in which a relationship can exist between occurrences of the same entity set
A)True
B)False
Q2) Attributes have a domain that specifies the data type of the attribute.
A)True
B)False
Q3) Relationship strength depends on how the primary key of the related entity is formulated, while the relationship ____________________ depends on how the business rule is written.
Q4) Cardinality expresses the minimum and maximum number of entity occurrences associated with one occurrence of the related entity.
A)True
B)False
Q5) The Crow's Foot notation depicts the strong relationship with a(n) ____________________ line between the entities.
Q6) A(n) ____________________ attribute is an attribute that must have a value.
Q7) ____________________ are underlined in an ER diagram.
Q8) The ERM forms the basis of a(n) ___________________________________. Page 9
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Chapter 8: Data Modeling Advanced Concepts
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Sample Questions
Q1) A ____ occurs when you have one entity in two 1:M relationships to other entities, thus producing an association among the other entities that is not expressed in the model.
A) surrogate primary keys
B) time-variant data
C) design trap
D) fan trap
Q2) The "____" characteristic of a primary key states the following: The PK must uniquely identify each entity instance. A primary key must be able to guarantee unique values. It cannot contain nulls.
A) unique values
B) nonintelligent
C) preferably single-attribute
D) security complaint
Q3) Implementing non-overlapping subtypes requires the use of one discriminator attribute for each subtype.
A)True
B)False
Q4) What is an entity cluster?
Q5) What do specialization hierarchies do?
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Chapter 9: Normalizing Database Designs
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Sample Questions
Q1) Normalization works through a series of stages called normal forms. For most purposes in business database design, ____ stages are as high as you need to go in the normalization process.
A) two
B) three
C) four
D) five
Q2) An attribute that cannot be further divided is said to display
Q3) Explain how database designers design and normalize databases.
Q4) Normalization represents a micro view of the entities within the ERD.
A)True
B)False
Q5) A good relational DBMS excels at managing denormalized relations. A)True B)False
Q6) Describe a dependency diagram and explain its purpose.
Q7) Normalization purity is easy to sustain in the modern database environment. A)True B)False
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Chapter 10: Distributed Databases
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Sample Questions
Q1) A ____ contains the description of the entire database as seen by the database administrator.
A) distributed global dictionary
B) distributed data dictionary
C) distributed global schema
D) distributed data schema
Q2) The ____________________ fragment condition indicates that each row is unique, regardless of the fragment in which it is located.
Q3) A fully distributed database management system must perform all of the functions of a centralized DBMS. What are these functions?
Q4) Both distributed processing and distributed databases require a network to connect all components.
A)True
B)False
Q5) A remote transaction, composed of several requests, may access data at multiple sites.
A)True
B)False
Q6) A user-friendly ____________________ is one advantage of a DDBMS.
Page 13
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Chapter 11: Interacting With Databases Through the Web
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Q1) ODBC, OLE-DB, and ADO.NET form the backbone of the ______________________________ architecture.
Q2) A programming language typically used for CGI scripts is ____.
A) PERL
B) Java
C) SQL
D) JavaScript
Q3) The effects of bad database design, implementation, and management are multiplied in an environment in which transactions may be measured in hundreds of thousands per day, rather than in hundreds per day.
A)True
B)False
Q4) A(n) ____________________ provides limited additional semantic value to XML, such as data type support or data validation rules.
Q5) ____________________ are objects that manage the connection with a data source and provide data to the consumers.
Q6) The Web has helped create a new information dissemination standard.
A)True
B)False
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Chapter 12: Database Administration and Security
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Sample Questions
Q1) The ____ is responsible for ensuring database security and integrity.
A) database programmer
B) systems analyst
C) data administrator
D) database security officer
Q2) Explain user requirements gathering as part of the DBA's end-user support services.
Q3) Placing the DBA function in a(n) ____________________ position often creates a consulting environment in which the DBA is able to devise the data administration strategy but does not have the authority to enforce it or to resolve possible conflicts.
Q4) The person responsible for the control of the centralized and shared database is the database ____.
A) analyst
B) administrator
C) programmer
D) user
Q5) The DBA must review the database application design to ensure that transactions are ____________________, meaning that they do not overload the DBMS.
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Chapter 13: Managing Transactions and Concurrency
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Q1) The last step in the write-through technique recovery procedure is to identify the last checkpoint in the transaction log.
A)True
B)False
Q2) What is transaction isolation and why it is important?
Q3) A transaction is a ____ unit of work that must be either entirely completed or aborted.
A) timed
B) practical
C) logical
D) physical
Q4) What are database checkpoints?
Q5) The ANSI has defined standards that govern SQL database transactions. Transaction support is provided by two SQL statements: ____ and ROLLBACK.
A) RETRIEVE
B) ASSIGN
C) UPDATE
D) COMMIT
Q6) How does a shared/exclusive lock schema increase the lock manager's overhead?
Page 16
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Chapter 14: Managing Database and Sql Performance
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Q1) The DBMS ____ the SQL query and chooses the most efficient access/execution plan.
A) parses
B) executes
C) fetches
D) processes
Q2) The majority of primary memory resources will be allocated to the ____ cache.
A) data
B) SQL
C) sort
D) optimizer
Q3) The ____ table space is used to store the data dictionary tables.
A) system
B) user data
C) temporary
D) rollback segment
Q4) Good database performance is easy to evaluate.
A)True
B)False
Q5) Describe query optimization and the modes that an optimizer can operate in.
Page 17
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Chapter 15: Databases for Decision Support
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Sample Questions
Q1) ____ are in charge of presenting the data to the end user in a variety of ways.
A) Data stores
B) ETL tools
C) Data visualization tools
D) Data analysis tools
Q2) Computed or derived facts are sometimes called ____ to differentiate them from stored facts.
A) details
B) attributes
C) metrics
D) fact tables
Q3) To support a(n) ____________________ adequately, the DBMS might be required to use advanced hardware, such as multiple disk arrays, and even more importantly, to support multiple-processor technologies, such as a symmetric multiprocessor (SMP) or a massively parallel processor (MPP).
Q4) BI is a framework that allows a business to transform data into information, information into knowledge, and knowledge into wisdom.
A)True
B)False
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