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DBST651 9040 Midterm exam part 1 and 2 (fall 2014)




Question;MIDTERM;PART I;1. Which of the following is a characteristic of;databases?;A) Many users can use the same database at the;same time;B) Different database entities can be connected;to provide more information;C) Relevant business data are stored in a;database;D) All of the above;2. A(n);enables a database administrator to define schema components.;A) extensible markup language (XML);B) data definition language (DDL);C) unified modeling language (UML);D) query language;Use the following to;answer questions 4 - 5;A database table;consists of the following columns: employee's name, SS#, job-title;hiring-date, years-in-job, base-salary.;A bonus calculation program, a personnel promotion application program;and a payroll application program all use this table. To implement a policy change in personnel;promotion, the following column is added to the table: highest-college-degree.;This new column is not used by the payroll program or by the bonus calculation;program.;3. The;following application program will be modified to accommodate the change to the;database table;A) The bonus calculation program;B) The personnel promotion application program;C) The payroll application program;D) All of the above;4. The;ability to add the new column without requiring changes to all of the;application programs strongly relates to the following feature of modern;database systems;A) Nonprocedural programming;B) Transaction processing;C) Data independence;D) Data sharing;5. Entity;Relationship Diagrams are input to the following phase of Database Development;A) Logical Database Design;B) Conceptual Data Modeling;C) Physical Database Design;D) Distributed Database Design;6.;Advantages of a DBMS are;A) Improved data;sharing and data security;B) Better data;integration;C) Minimized data;inconsistency and increase end-user productivity;D) Improved data;access and decision making;E) All of the above;7.;In a;relational table the order of the rows and columns are immaterial to the DBMS;True False;Use the following to answer Questions 8-11;The following data are in;the tables Employee (primary key: Empno) and Department (primary key: Deptno).;The questions refer to row numbers of this table. The first row of each table;is row #1. Empdeptno in table Employee is a foreign key that refers to Deptno;in the table Department. Deptmgr in the table Department is a foreign key that;refers to Empno in the table Employee.;8. Which of the;following statements is true?;A. Row #7 of table Employee violates neither the entity integrity rule nor;the referential integrity rule.;B. Row #7 of table Employee violates the entity integrity rule.;C. Row #7 of table Employee violates the referential integrity rule.;D. Row #7 of table Employee violates both the entity integrity rule and;the referential integrity rule.;9. An inner join only;returns matched records from the tables that are being joined.;True False;10. Which of the;following columns of the table Department is a foreign key?;A. Deptno;B. Deptname;C. Deptcity;D. Deptmgr;11. The values shown in;the table Department;A. violate neither the entity integrity rule nor the referential integrity;rule;B. violate the entity integrity rule;C. violate the referential integrity rule;D. violates both the entity integrity rule and the referential integrity;rule;12. In the relational model, ____ are important;because they are used to ensure that each row in a table is uniquely;identifiable.;A) Relations;B) Indexes;C) Keys;D) Logical;structures;13. Entity supertype Contains unique characteristics of each entity;subtype;True False;14. The ____ is not supported directly in the relational;environment.;A) M:N;B) 1:M;C) M:1;D) 1:1;15.;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;16. The following step occurs first in the process;of building an ERD: ____.;A) Develop the initial ERD.;B) Identify the business rules based;on the description of operations.;C) Identify the attributes and;primary keys that adequately describe the entities.;D) Create a detailed narrative of;the organization?s description of operations.;17. When the PK of one entity does not contain the;PK of a related entity, the relationship is ____.;A) Weak;B) Strong;C) Neutral;D) Missing;18. In Crow's Foot;notation, the symbol;Denotes one or many, the ?many?;side is optional;True False;19. Entities;corresponds to table and not to row in relational environment;True False;20. The;key is an attribute or a combination of attributes in one;table whose values must either match the primary key in another table or be be;null;A);Super Key;B);Candidate Key;C);Primary Key;D);Foreign Key;E);Secondary Key;21. The three stage;process in natural joins are;A);Product, Union, Project;B);Product, Select, Intersect;C);Product, Select, Project;22. Composite;attribute can be subdivided;True False;23. In a supertype;subtype relationship;A);Subtype entities inherit attributes and relationships of supertype;B);All entity subtypes inherit their primary key attribute from their;supertype;C);Entity subtypes inherit all relationships in which supertype;entity participates;D);All of the above.;24. Characteristics of Primary Key include;a.;Must have unique values and should be intelligent;b.;Should be nonintelligent and not change over time;c.;Must not change over time and composed of several attribute;25. Third Normal Form;is often as high as needed in normalization;True FalseMIDTERM PART II;Name: Date;Question 1;The;table shown below lists dentist-patient appointment data. A patient is given an appointment at a;specific time and date with a dentist located at a particular surgery. On each day of patient appointments, a;dentist is allocated to a specific surgery for that day.;StaffNo;Dentist Name;PatNo;PatName;Appointment Date & Time;SurgeryNo;S1011;S1011;S1024;S1024;S1032;S1032;James Bond;James Bond;Andrew Joe;Andrew Joe;Kevin King;Kevin King;P100;P105;P108;P108;P107;P110;Kim Su;Jenny Gold;Ian Chappell;Ian Chappell;John Spooner;Frank Holey;1/9/05 10.00;1/9/05 12.00;1/9/05 10.00;2/7/05 14.00;2/7/05 16.30;2/7/05 18.00;S10;S15;S10;S10;S15;S13;Evaluate;if the table shown above is normalized, if not describe and illustrate the;process of normalizing the table shown above to third normal form. Show your work in table format along with step by step explanations;of how you got from to 1NF, 2NF, and 3NF.State;any assumptions you make about the data shown in this table. (20 Points);Question 2;Please;provide answers to problems 10 through 16 in Chapter 3 of Coronel book after;reading the problem. (Page 99-100) (15 Points);Question 3;Please;provide answers to Questions (located under the Review Question in our;textbook) 7-9 in chapter 5 of Coronel;book after reading the problem. (Page 172) (15 Points)


Paper#36579 | Written in 18-Jul-2015

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