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Question 1:
Research the definition of a "minimal cover". Explain it in your own words and give an example.
Question 2:
Consider the following relation R with sample data where names are unique:
MOTHER
CHILD
GIFT
DATE
OCCASION
Linda
Jim
Bike
1-20-2009
Birthday
Sweater
12-25-2008
Christmas
CD
3-8-2007
Grade Report
Mary
Game
Book
2-20-2006
Susan
David
7-20-2009
Shoes
8-30-2009
Back to School
1- What functional dependencies can you conclude from the data above?
2- What is the highest normal form R is in?
3- If R is not in BCNF, then decompose R to become in BCNF and show that all functional dependencies still hold.
Compute the closure sets of R - find all non-trivial dependencies and what are the candidate keys of R?
Write a program that models an employee. An employee has an employee number, a name, an address, and a hire date. A name consists of a first name and a last name.
Describe the different procedure performed in DBMS for student database in which fields are student id, student name, student class, marks.
You are to design a prototype for a hospital management system. Design a data model for this system, Convert the data model to a set of virtual windows.
Consider relation schema r(A,B,C,D,E, F) and a set of functional dependencies {A BCD,BCDE,BD,DA}. Calculate canonical cover for set of functional dependencies (show each step of your derivation with an explanation).
Create an ERD and relatioal schema in third normal form based upon the following business rules. (Hint: ensure that all attributes are FULLY DETERMINED by the primary key.) Don't forget to place your normalization arrows on your relational schema.
Using example of vehicles and drivers, explain issues to convert relationship for new cardinality including new relationships and attributes for the tables.
Mark the following words in the document as index entries: behavior (four instances), favorable (five instances), and impression (eight instances).
Describe relationships with the example. Also illustrate degree of relationship for that example. Describe the different operations of relational algebra with suitable example each.
Transform the tables into one or more tables in BCNF. Write the primary keys, candidate keys, and referential integrity constraints.
What is meant by a Metadata? How does this term pertain to a database? Write down advantage is there in storing metadata in tables?
Assume you were a newly hired IT Security Manager at a software development company that in the past hasn't paid much attention to security, especially in its database development processes.
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