Database Management Systems
Exam Review
Course Introduction
Database Management Systems is a foundational course that introduces students to the principles, architectures, and applications of modern database systems. Through an exploration of data models particularly the relational model students learn to design effective databases, develop structured query language (SQL) skills, and understand concepts such as normalization, indexing, transaction management, and data integrity. The course also examines database security, backup and recovery, and emerging trends in database technologies, equipping students with practical abilities to implement and maintain robust database solutions in real-world scenarios.
Recommended Textbook
Database Systems Introduction to Databases and Data Warehouses 1st Edition by Nenad Jukic
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10 Chapters
752 Verified Questions
752 Flashcards
Source URL: https://quizplus.com/study-set/3126
Page 2
Chapter 1: Introduction
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57 Verified Questions
57 Flashcards
Source URL: https://quizplus.com/quiz/61941
Sample Questions
Q1) Which of the following is a component of a database system?
A)Database
B)DBMS
C)Front-end applications
D)All of the above
Answer: D
Q2) The term data refers to facts that are recorded and can be accessed.
A)True
B)False
Answer: True
Q3) Joe is an example of:
A)Data
B)Metadata
C)Data Type
D)DBMS
Answer: A
Q4) The terms data and information should never be used as synonyms for each other.
A)True
B)False
Answer: False
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Chapter 2: Database Requirements and ER Modeling
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100 Verified Questions
100 Flashcards
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Sample Questions
Q1) Minimum cardinality can be many.
A)True
B)False
Answer: False
Q2) Which of the following is a legitimate exact minimum and maximum cardinality?
A)(20,10)
B)(5,0)
C)(5,10)
D)(5,4)
Answer: C
Q3) Minimum cardinality can be:
A)One or many
B)Zero or many
C)Optional or mandatory
D)Optional or many
Answer: C
Q4) Two entities can be related via multiple different binary relationships.
A)True
B)False
Answer: True
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Chapter 3: Relational Database Modeling
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100 Verified Questions
100 Flashcards
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Sample Questions
Q1) If a 1:M relationship is optional on the M side and mandatory on the 1 side,and if the table resulting from the 1 side has 3 records,then the table resulting from the M side CANNOT have less than ________ records.
A)0
B)1
C)2
D)3
Answer: A
Q2) A relation resulting from a weak entity has a non-composite primary key when the identifying relationship is:
A)Optional on both sides
B)1:1
C)1:M
D)M:N
Answer: B
Q3) An entity and its M:N unary relationship are mapped as one relation. A)True
B)False
Answer: False
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Page 5
Chapter 4: Update Operations, update Anomalies, and Normalization
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100 Verified Questions
100 Flashcards
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Sample Questions
Q1) Functional dependency OwnerName --> VehicleID exists in the table VEHICLE. A)True
B)False
Q2) Changing the name of owner O3,Pam to Pamela in the table VEHICLE will cause an occurrence of a modification anomaly.
A)True
B)False
Q3) Which of the following (regarding the relation ENROLLMENT)represents the insertion anomaly?
A)Inability to insert a student without adding a class
B)Inability to insert a class without adding a student
C)Inability to insert a class name without a class ID
D)Inability to insert a student name without a student ID
Q4) Functional dependency OwnerID --> OwnerName exists in the table VEHICLE. A)True
B)False
Q5) Full key functional dependency exists in the table STUDENT.
A)True
B)False
Q6) Which three operations are collectively referred to as update operations? Page 6
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Page 7
Chapter 5: SQL
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100 Verified Questions
100 Flashcards
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Sample Questions
Q1) Write an SQL statement for the HAPPY INSURANCE database that drops the column AreaName from the table AREA.
Q2) Show the INSERT INTO statements for the table VEHICLE.
Q3) What will be the result of the following query on table STUDENT?
SELECT COUNT( *)FROM student GROUP BY class HAVING COUNT(*)<3;
A)Number 5
B)Number 2
C)Numbers 2 and 3
D)Numbers 1 and 1
Q4) Which of the following is a part of a DDL statement?
A)CREATE
B)INSERT
C)DELETE
D)SELECT
Q5) Show the INSERT INTO statements for the table CLIENT.
Q6) What is an OUTER JOIN?
Q7) Write an SQL query for the HAPPY INSURANCE database that will list the agent ID and agent name for each agent hired before the year 2000.
Q8) What is a view?
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Chapter 6: Database Implementation and Use
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55 Verified Questions
55 Flashcards
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Sample Questions
Q1) Describe the delete restrict option (for implementing a referential integrity constraint).
Q2) Assume a form is created for HAPPY INSURANCE database where a user can perform the following action:
A user highlights the first row of the CLIENT table and presses the delete key on the keyboard.
Write the SQL statement that will be issued on the user's behalf based on this action.
Q3) If a DBMS enforces in the HAPPY INSURANCE database an UPDATE RESTRICT option on the referential integrity constraint between AGENT and AGENT (i.e. ,circular referential referential integrity constraint for table AGENT)in the HAPPY INSURANCE database,and an UPDATE CASCADE between AGENT and CLIENT,value A1 in the second record in the table AGENT can be changed to A5.
A)True
B)False
Q4) Show the CREATE TABLE statements for HAPPY INSURANCE database for the table CLIENT (assume that non-primary key columns can be optional)with the DELETE SET-TO-NULL and UPDATE CASCADE option for its referential integrity constraint.
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9
Chapter 7: Data Warehousing Concepts
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48 Verified Questions
48 Flashcards
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Sample Questions
Q1) List the three major components of every data warehousing system.
Q2) What is an independent data mart?
Q3) Operational queries are typically issued:
A)By fewer users than analytical queries
B)By more users than analytical queries
C)By an equal number of users as analytical queries
D)By no users if the corporation has users issuing analytical queries
Q4) Operational queries typically process:
A)Larger amounts of data than analytical queries
B)Smaller amounts of data than analytical queries
C)Equal amounts of data as analytical queries
D)Infinite amounts of data,incomparable to analytical queries
Q5) Explain the term detailed and/or summarized data in the following data warehouse definition,and elaborate on the reasons for storing detailed and aggregated data in the data warehouse:
The data warehouse is a structured repository of integrated,subject-oriented,enterprise-wide,historical,and time-variant data.The purpose of the data warehouse is the retrieval of analytical information.A data warehouse can store detailed and/or summarized data.
Q6) What is a dependent data mart?
Page 10
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Chapter 8: Data Warehouse and Data Mart Modeling
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100 Verified Questions
100 Flashcards
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Sample Questions
Q1) The STATEWIDE HEALTH star schema contains the dimension PATIENT.
A)True
B)False
Q2) In a typical,properly designed star schema,the number of records (rows)in any of the dimension tables is:
A)Larger than in the fact table
B)Same as in the fact table
C)Smaller than in the fact table
D)No typical rule-there is an even number of dimension tables with larger,smaller and same number of records as in the fact table
Q3) Based on the data shown in the STATEWIDE HEALTH PRESCRIPTIONS DATABASE,the dimension DOCTOR in the STATEWIDE HEALTH star schema has ________ records.
A)0 (the dimension DOCTOR does not exist)
B)3
C)4
D)5
Q4) Transaction time is typically included as a column in the fact table.
A)True
B)False
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Chapter 9: Data Warehouse Implementation and Use
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50 Verified Questions
50 Flashcards
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Sample Questions
Q1) What is an executive dashboard?
Q2) A user using an OLAP query (based on the dimensionally modeled data set that contains the ABC Retailer dimension PRODUCT)can drill up from ProductID to ProductCategoryID.
A)True
B)False
Q3) Querying and presenting data from data warehouses and/or data marts for analytical purposes is known as:
A)ETL
B)OLAP
C)OLTP
D)Micro batches
Q4) If applicable,the archived data from operational sources is loaded in the data warehouse during the:
A)Refresh load
B)First load
C)Final load
D)Archived data can never be loaded in the data warehouse
Q5) What is a refresh load?
Q6) What is a data warehouse alpha release?
Page 12
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Chapter 10: Overview of Dbms Functionalities and Database Administration
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42 Verified Questions
42 Flashcards
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Sample Questions
Q1) What is the difference between accidental misuse and malicious data updates?
Q2) The data definition component is a part of every DBMS package. A)True B)False
Q3) What is a common purpose for all database policies and standards?
Q4) What is the purpose of the COMMIT command?
Q5) What is the query cost?
Q6) What is a complete mirrored backup?
Q7) What is query optimization?
Q8) What is the purpose of the data definition component of a DBMS?
Q9) The application development component is a part of every DBMS package. A)True B)False
Q10) In a role-based access control system,users can be assigned several database roles. A)True B)False Page 13
What is database recovery?
Q12) What is a query optimizer?
Q13) What is a single-user DBMS?
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Page 14