Database Management Systems
Exam Preparation Guide
Course Introduction
Database Management Systems (DBMS) is a comprehensive course that introduces students to the fundamental concepts and principles underlying the design, implementation, and management of databases. The course covers topics such as data models, relational databases, SQL querying, normalization, transaction management, and data integrity. Students will explore the architecture of modern database systems, learn techniques for efficient data storage and retrieval, and gain practical experience through hands-on projects involving database design and management. Emphasis is placed on understanding how DBMS supports data consistency, security, and concurrent access in real-world applications.
Recommended Textbook
Database Systems Design Implementation and Management 11th Edition by Carlos Coronel
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15 Chapters
1318 Verified Questions
1318 Flashcards
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Chapter 1: Database Systems
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76 Verified Questions
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Sample Questions
Q1) Which of the following is True of spreadsheet applications?
A) They provide enhanced security and robust data sharing
B) They do not allow manipulation of data features. once entered.
C) They are a better alternative to databases.
D) They enhance the user's ability to understand the data.
Answer: D
Q2) Field refers to a collection of related records.
A)True
B)False
Answer: False
Q3) The term refers to an organization of components that define and regulate the collection, storage, management and use of data within a database environment.
A) structured data
B) transaction
C) management system
D) database system
Answer: D
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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75 Flashcards
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Sample Questions
Q1) NoSQL databases:
A) are geared toward transaction consistency; not performance.
B) support only small amounts of sparse data.
C) are based on the relational model.
D) provide fault tolerance.
Answer: D
Q2) Today, most relational database products can be classified as object/relational.
A)True
B)False
Answer: True
Q3) In , a three-pronged symbol represents the "many" side of the relationship.
Answer: Crow's Foot notation
Q4) The relational model's foundation is a mathematical concept known as a . Answer: relation
Q5) What do business rules require to be effective?
Answer: To be effective, business rules must be easy to understand and widely disseminated to ensure that every person in the organization shares a common interpretation of the rules. Business rules describe, in simple language, the main and distinguishing characteristics of the data as viewed by the company.
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Chapter 3: The Relational Database Model
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Sample Questions
Q1) As rare as 1:1 relationships should be, certain conditions absolutely require their use.
A)True
B)False
Answer: True
Q2) The 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) relational
D) null
Answer: A
Q3) The one-to-many (1:M) relationship is easily implemented in the relational model by putting the foreign key of the "1" side in the table of the "many" side as a primary key.
A)True
B)False
Answer: False
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Page 5
Chapter 4: Entity Relationship Er Modeling
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Sample Questions
Q1) Unary relationships are common in manufacturing industries.
A)True
B)False
Q2) An entity in the entity relationship model corresponds to a table in the relational environment.
A)True
B)False
Q3) 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
Q4) 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
Q5) A(n) attribute need not be physically stored within the database.
Q6) Explain mandatory participation in an entity relationship.
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Chapter 5: Advanced Data Modeling
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Sample Questions
Q1) The default comparison condition for the subtype discriminator attribute is the comparison.
A) nonequality
B) less than
C) greater than
D) equality
Q2) According to the "preferably single-attribute" characteristic of a primary key, the primary key:
A) must be able to guarantee unique attribute values.
B) should have the minimum number of attributes possible.
C) should have embedded semantic meaning associated with each attribute.
D) must be composed of attributes that are free from security risks or violations.
Q3) keys work with primary keys to properly implement relationships in the relational model.
A) Foreign
B) Composite
C) Natural
D) Surrogate
Q4) completeness means that not every supertype occurrence is a member of a subtype.
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Chapter 6: Normalization of Database Tables
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110 Flashcards
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Sample Questions
Q1) An example of denormalization is using a denormalized table to hold report data. This is required when creating a tabular report in which the columns represent data that are stored in the table as rows.
A) transitive
B) 3NF
C) component
D) temporary
Q2) A table that is in 1NF and includes no partial dependencies is said to be in .
A) BCNF
B) 2NF
C) 3NF
D) 4NF
Q3) The combination of and ER modeling yields a useful ERD, whose entities may now be translated into appropriate table structures.
Q4) 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.
Q5) An ERD is created through an process.
Q6) Explain normalization and its different forms.
Page 8
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Chapter 7: Introduction to Structured Query Language Sql
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111 Flashcards
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Sample Questions
Q1) Which of the following queries will output the table contents when the value of P_PRICE is less than or equal to 10?
A) SELECT P_DESCRIPT, P_INDATE, P_PRICE, V_CODE FROM PRODUCT WHERE P_PRICE <> 10;
B) SELECT P_DESCRIPT, P_INDATE, P_PRICE, V_CODE FROM PRODUCT WHERE P_PRICE <= 10;
C) SELECT P_DESCRIPT, P_INDATE, P_PRICE, V_CODE FROM PRODUCT WHERE P_PRICE => 10;
D) SELECT P_DESCRIPT, P_INDATE, P_PRICE, V_CODE FROM PRODUCT WHERE P_PRICE = 10;
Q2) In a 1:M relationship, a user must always create the table for the side first.
Q3) An example of a command a user would use when making changes to a PRODUCT table is .
A) CHANGE PRODUCT SET P_INDATE = '18-JAN-2004' WHERE P_CODE = '13-Q2/P2';
B) ROLLBACK PRODUCT SET P_INDATE = '18-JAN-2004' WHERE P_CODE = '13-Q2/P2';
C) EDIT PRODUCT SET P_INDATE = '18-JAN-2004' WHERE P_CODE = '13-Q2/P2';
D) UPDATE PRODUCT SET P_INDATE = '18-JAN-2004' WHERE P_CODE = '13-Q2/P2';
Q4) What is a subquery? When is it used? Does the RDBMS deal with subqueries any differently from normal queries?
Q5) Using the command, SQL indexes can be created on the basis of any selected attribute.
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Chapter 8: Advanced Sql
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109 Flashcards
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Sample Questions
Q1) A trigger is procedural SQL code that is automatically invoked by the RDBMS upon the occurrence of a given data manipulation event.
A)True
B)False
Q2) The Oracle function returns the current date.
A) DATE
B) SYSDATE
C) CURRENT_DATE
D) TO_DATE
Q3) MySQL allows multiple triggering conditions per trigger.
A)True
B)False
Q4) "Linked SQL" is a term used to refer to SQL statements that are contained within an application programming language such as COBOL, C++, ASP, Java, or ColdFusion.
A)True
B)False
Q5) A row-level trigger requires use of the keywords and is executed once for each row affected by the triggering statement.
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Page 10
Chapter 9: Database Design
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Sample Questions
Q1) In the Systems Development Life Cycle (SDLC), after testing is concluded, end-user training is not necessary.
A)True
B)False
Q2) Installation and fine tuning are part of the phase of the Systems Development Life Cycle (SDLC).
A) planning
B) analysis
C) detailed systems design
D) implementation
Q3) 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
Q4) The database initial study phase of the Database Life Cycle (DBLC) involves .
A) defining objectives
B) introducing changes
C) testing the database
D) installing the DBMS
Page 11
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Chapter 10: Transaction Management and Concurrency
Control
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85 Flashcards
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Sample Questions
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 semantically correct.
A)True
B)False
Q2) The implicit beginning of a transaction is .
A) when the database is started
B) when a table is accessed for the first time
C) when the first SQL statement is encountered
D) when the COMMIT command is issued
Q3) How do transaction recovery procedures use the deferred-write and write-through techniques to recover transactions?
Q4) The multiuser DBMS must implement controls to ensure serializability and isolation of transactions, in addition to atomicity and durability, in order to guard the database's consistency and integrity.
A)True
B)False
Page 12
Q5) How does a shared/exclusive lock schema increase the lock manager's overhead?
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Chapter 11: Database Performance Tuning and Query
Optimization
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85 Flashcards
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Sample Questions
Q1) How can queries be written to perform the fastest when equality and inequality comparisons are needed?
Q2) Character field comparisons are faster than numeric, date, and NULL comparisons.
A)True
B)False
Q3) Working with data in the data cache is many times faster than working with data in the data files.
A)True
B)False
Q4) Indexes are very useful in small tables or tables with low sparsity.
A)True
B)False
Q5) Maximizing disk contention is one of the general recommendations for the physical storage of databases.
A)True
B)False
Q6) One of the main functions of a database system is to provide timely answers to end users.
A)True
B)False Page 13
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Page 14
Chapter 12: Distributed Database Management Systems
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Sample Questions
Q1) The distributed database system must be of the computer hardware system.
Q2) A distributed can reference several different local or remote data processing sites. A) request
B) site
C) data location
D) transaction
Q3) The level of transparency supported by the distributed database management system remains the same for all systems.
A)True
B)False
Q4) One of the advantages of a distributed database management system (DDBMS) is operating cost.
Q5) In a distributed database management system (DDBMS), control is used to manage simultaneous data access and ensure data consistency across database fragments.
Q6) The protocol is used by a DP to roll transactions back and forward with the help of the system's transaction log entries.
Q7) Explain the three types of operations defined by the DO-UNDO-REDO protocol.
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Chapter 13: Business Intelligence and Data Warehouses
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75 Verified Questions
75 Flashcards
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Sample Questions
Q1) The basic star schema has four components: facts, , attributes, and attribute hierarchies.
A) keys
B) relationships
C) cubes
D) dimensions
Q2) Which of the following is a personal analytics vendor for BI applications?
A) IBM
B) Kognitio
C) Netezza
D) MicroStrategy
Q3) Explain the concept of data analytics. What are the various tools of data analytics?
Q4) Data _____ tools are tools that provide advanced statistical analysis to uncover problems and opportunities hidden within business data.
Q5) A index is based on 0 and 1 bits to represent a given condition.
A) logical
B) multidimensional
C) normal
D) bitmapped
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Chapter 14: Database Connectivity and Web Technologies
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Sample Questions
Q1) In the OLE-DB model, the acts like a data consumer of the data provider and as a data provider for the data consumer (end-user application).
Q2) A web server is a middleware application that expands the functionality of web servers by linking them to a wide range of services.
Q3) , or transactions done over the Internet, enables all types of organizations to sell products and services to a global market.
Q4) ODBC works on the operating system.
A) Kronos
B) UNIX
C) Windows
D) Mac
Q5) In the database query scenario, the web server generates the webpage contents before it sends the page to the client web browser.
A)True
B)False
Q6) A(n) _____ is a program written in a programming language that is not compiled, but is interpreted and executed at run time.
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Chapter 15: Database Administration and Security
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Sample Questions
Q1) "All users must have passwords" is an example of a .
A) rule
B) policy
C) standard
D) procedure
Q2) Within the data security framework, is concerned with keeping data consistent and free of errors or anomalies.
Q3) User-access management is a subset of .
A) password protection
B) authorization management
C) data integrity management
D) managerial control
Q4) Incremental backups produce a backup of all data.
A)True
B)False
Q5) In case a company installs several incompatible databases and assigns a DBA for each of them, the general coordinator of all such DBAs is known as the administrator.
Q6) The aspect of introducing a DBMS in an organization deals with hardware and software changes in the organization.
Page 18
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