Data Modeling Exam Materials
Course Introduction
Data Modeling is a foundational course that explores the principles and practices of representing real-world data structures in a systematic and organized manner. Students will learn how to analyze data requirements, design conceptual, logical, and physical data models, and utilize tools such as Entity-Relationship Diagrams (ERD) to visualize data relationships. The course covers normalization techniques, schema design, and the transition from models to database implementation, equipping learners with the skills needed to efficiently structure and manage data within modern database systems. Emphasis is placed on understanding data integrity, consistency, and the role of data models in supporting business intelligence and analytics.
Recommended Textbook
Database Systems Design Implementation and Management 13th Edition by Carlos Coronel
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16 Chapters
1194 Verified Questions
1194 Flashcards
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Chapter 1: Database Systems
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Sample Questions
Q1) Metadata describe the data characteristics and the set of relationships that links the data found within the database.
A)True
B)False
Answer: True
Q2) Data is the result of processing raw facts to reveal its meaning.
A)True
B)False
Answer: False
Q3) One disadvantage of the DBMS is that it increases the risk of data security breaches.
A)True
B)False
Answer: False
Q4) A _____ is a collection of related records.
A) schema
B) field
C) column
D) file
Answer: D
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Chapter 2: Data Models
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Sample Questions
Q1) An internal _____ refers to a specific representation of an internal model, using the database constructs supported by the chosen database.
Answer: schema
Q2) In the _____ model, each parent can have many children, but each child has only one parent.
A) hierarchical
B) network
C) relational
D) entity relationship
Answer: A
Q3) Business rules apply to businesses and government groups, but not to other types of organizations such as religious groups or research laboratories.
A)True
B)False
Answer: False
Q4) A data model is usually graphical.
A)True
B)False
Answer: True
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Chapter 3: The Relational Database Model
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Sample Questions
Q1) A(n) _____ join links tables by selecting only the rows with common values in their common attribute(s).
A) attribute
B) unique
C) foreign
D) natural
Answer: D
Q2) Only a single attribute, not multiple attributes, can define functional dependence.
A)True
B)False
Answer: False
Q3) The _____ is actually a system-created database whose tables store the user/designer-created database characteristics and contents.
A) database tuple
B) systematic database
C) unique index
D) system catalog
Answer: D
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Chapter 4: Entity Relationship Er Modeling
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Sample Questions
Q1) A weak relationship exists if the primary key of the related entity contains at least one primary key component of the parent entity.
A)True
B)False
Q2) _____ are characteristics of entities.
Q3) Explain recursive relationships with the help of an example.
Q4) The decision to store _____ attributes in database tables depends on the processing requirements and the constraints placed on a particular application.
A) multivalued
B) derived
C) single-valued
D) composite
Q5) The existence of a(n) _____ entity indicates that its minimum cardinality is zero.
A) ternary
B) optional
C) strong
D) weak
Q6) A(n) _____ process is based on repetition of processes and procedures.
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Chapter 5: Advanced Data Modeling
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Sample Questions
Q1) A(n)_____ is a generic entity type that is related to one or more entity subtypes.
A) subtype discriminator
B) inheritance
C) specialization hierarchy
D) entity supertype
Q2) One practical advantage of a(n) _____ key is that because it has no intrinsic meaning, values for it can be generated by the DBMS to ensure that unique values are always provided.
Q3) A specialization hierarchy can have _____ level(s) of supertype/subtype relationships.
A) zero
B) only one
C) one or many
D) many
Q4) The completeness constraint can be partial or total.
A)True
B)False
Q5) Specialization is based on grouping _____ characteristics and relationships of the subtypes.
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Chapter 6: Normalization of Database Tables
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Sample Questions
Q1) In a real-world environment, changing granularity requirements might dictate changes in primary key selection, and those changes might ultimately require the use of _____ keys.
Q2) In order to meet performance requirements, portions of the database design may need to be occasionally denormalized.
A)True
B)False
Q3) Repeating groups must be eliminated by ensuring that each row defines a single entity.
A)True
B)False
Q4) Normalization works through a series of stages called normal forms.
A)True
B)False
Q5) In order to meet _____ requirements, you may have to denormalize some portions of a database design.
Q6) Explain normalization and its different forms.
Q7) Any attribute that is at least part of a key is known as a(n) _____.
Page 8
Q8) What steps are involved in the conversion to third normal form?
Q9) In the _____, no row may contain two or more multivalued facts about an entity.
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Chapter 7: Introduction to Structured Query Language Sql
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Sample Questions
Q1) The _____ function returns the current system date in MS Access.
A) TO_DATE()
B) SYSDATE()
C) DATE()
D) TODAY()
Q2) When using a(n) _____ join, only rows from the tables that match on a common value are returned.
A) full
B) outer
C) inner
D) set
Q3) _____ functions allow you to take a value of a given data type and convert it to the equivalent value in another data type.
Q4) The _____ command restricts the selection of grouped rows based on a condition.
A) DISPLAY
B) HAVING
C) FROM
D) CONVERT
Q5) What are the four different types of results that can be returned from a subquery?
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Chapter 8: Advanced Sql
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Sample Questions
Q1) SQL supports the conditional execution of procedures (IF-THEN-ELSE statements) that are typically supported by a programming language.
A)True
B)False
Q2) A persistent stored module is stored and executed on the database client machine.
A)True
B)False
Q3) _____ is a cursor attribute that returns TRUE if the last FETCH returned a row, and FALSE if not.
A) %ROWCOUNT
B) %NOTFOUND
C) %FOUND
D) %ISOPEN
Q4) In Oracle, you can use the SQL*Plus command SHOW ERRORS to help you diagnose errors found in PL/SQL blocks.
A)True
B)False
Q5) A table can be deleted from the database by using the _____ command.
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Chapter 9: Database Design
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Sample Questions
Q1) The maintenance and evolution phase of the Database Life Cycle (DBLC) involves
A) defining objectives
B) introducing changes
C) testing the database
D) installing the DBMS
Q2) What are the factors affecting the purchasing decision for DBMS software?
Q3) The implementation of _____ applications tends to prolong the operational life of systems by making them easier to update and maintain.
A) database-produced
B) network-produced
C) CASE-produced
D) design-produced
Q4) Systems analysis establishes the need for an information system and its extent.
A)True
B)False
Q5) A(n) _____ rule is a brief and precise narrative of a policy, procedure, or principle within a specific organization's environment.
Q6) The first step in _____ is to discover the data element characteristics.
Page 12
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Chapter 10: Transaction Management and Concurrency Control
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Sample Questions
Q1) The _____ manager is responsible for assigning and policing the locks used by transactions.
A) transaction
B) database
C) lock
D) schedule
Q2) The scheduler's main job is to create a(n) _____ of a transaction's operation, in which the interleaved executions of transactions yield the same results as if the transactions were executed in serial order.
Q3) Database transaction _____ restores a database from an inconsistent state to a previously consistent state.
Q4) The phenomenon of uncommitted data occurs when two transactions are executed concurrently and the first transaction is rolled back after the second transaction has already accessed the uncommitted data-thus violating the isolation property of transactions.
A)True
B)False
Q5) _____ can take place at any of the following levels: database, table, page, row, or field.
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Chapter 11: Database Performance Tuning and Query
Optimization
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Sample Questions
Q1) Bitmap indexes tend to use less space than a _____ because they use bits instead of bytes to store their data.
A) hash index
B) sparse index
C) B-tree index
D) reverse index
Q2) The _____ cache is used as a temporary storage area for ORDER BY or GROUP BY operations, as well as for index-creation functions.
A) data
B) SQL
C) sort
D) optimizer
Q3) All transaction management commands are processed during the parsing and execution phases of query processing.
A)True
B)False
Q4) A(n) _____ request is a low-level read or write data access operation to or from computer devices.
Page 14
Q5) List and describe some typical DBMS processes.
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Chapter 12: Distributed Database Management Systems
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Sample Questions
Q1) A distributed _____ contains the description of the entire database as seen by the database administrator.
A) global index
B) data dictionary
C) global catalog
D) data thesaurus
Q2) Distributed processing does not require:
A) processing function distribution to all storage sites.
B) an existing distributed database.
C) interconnected networks of components.
D) multiple sites to share processing chores.
Q3) Theweb is the repository for distributed data.
A)True
B)False
Q4) A _____ request lets a single SQL statement reference data located at several different local or remote DP sites.
A) distributed
B) transaction
C) fragmented
D) remote
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Chapter 13: Business Intelligence and Data Warehouses
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Sample Questions
Q1) The data warehouse development life cycle differs from classical systems development.
A)True
B)False
Q2) A(n)_____ is a read-only database optimized for data analysis and query processing.
Q3) Advanced OLAP feature become more useful when access to them is kept simple.
A)True
B)False
Q4) _____ are qualifying characteristics that provide additional perspectives to a given fact.
Q5) Data warehouse data are organized and summarized by table, such as CUSTOMER and ADDRESS.
A)True
B)False
Q6) Which of the following is a personal analytics vendor for BI applications?
A) IBM
B) Kognitio
C) Netezza
D) MicroStrategy
Page 16
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Chapter 14: Big Data and Nosql
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Sample Questions
Q1) Key-value and document databases are structurally similar.
A)True
B)False
Q2) ______ is keeping the same number of systems, but migrating each system to a larger system.
A) Clustering
B) Scaling up
C) Streaming
D) Scaling out
Q3) When using MapReduce,best practices suggest that the number of mappers on a given node should be ______.
A) 50 or less
B) over 100 but less than 300
C) 100 or less
D) at least 300
Q4) ______ do not store relationships as perceived in the relational model and generally have no support for join operations.
Q5) _______ languages allow the user to specify what they want, not how to get it which is very useful for query processing.
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Chapter 15: Database Connectivity and Web Technologies
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Sample Questions
Q1) The first line of an XML document represents the document declaration, and it is mandatory.
A)True
B)False
Q2) _____ is a higher-level, object-oriented application interface used to access remote database servers.
A) UDA
B) ODBC
C) DAO
D) RDO
Q3) Which of the following is true of a web application server?
A) It is Microsoft's implementation of a superset of the SQL Access Group CLI standard for database access.
B) It is automatically invoked by the browser when needed.
C) It runs on the client machine, freeing server resources.
D) It provides security and authentication of users through user IDs and passwords.
Q4) A DBMS that supports _____ exchanges can integrate with external systems such as the web, mobile data, and legacy systems, thus enabling the creation of new types of systems.
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Chapter 16: Database Administration and Security
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Sample Questions
Q1) In the context of database administration, standards are written instructions that describe a series of steps to be followed during the performance of a given activity.
A)True
B)False
Q2) _____ security breaches include database access by computer viruses and by hackers whose actions are designed to destroy or alter data.
A) Debilitative
B) Preserving
C) Corrupting
D) Destructive
Q3) The _____, also known as the information resource manager (IRM), usually reports directly to top management and is given a higher degree of responsibility and authority than the DBA, although the two roles can overlap.
Q4) Instructions to create a password are an example of a _____.
A) rule
B) policy
C) standard
D) procedure
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