### Database Normalization and Design TaskA company has several employees, each with unique names, who conduct interviews with job applicants (one applicant is interviewed by one employee). The job applicants also have distinct names. Interviewers schedule appointments for interviews with the applicants. Each applicant may be interviewed multiple times, potentially by different interviewers, but these interviews occur on different days.The company has designated interview rooms. Each interviewer uses the same room for all interviews in a day. A room can be shared by different interviewers on the same day, provided the interview times do not overlap.The interview appointment reservations will be computerized. The database developer has opted to use a single relation for all data, defined by the schema:**Interviews(interviewer, applicant, day, time, room)**Tasks:a) From the text, identify functional dependencies in the relation.b) Determine the keys of the relation.c) Demonstrate that the relation is in Third Normal Form (3NF) but not in Boyce-Codd Normal Form (BCNF).d) Decompose the relation into relations that are in BCNF.e) Extra assignment: Draw an Entity-Relationship (E/R) diagram representing the system. Try to include all dependencies from the text in the diagram, which may be challenging.

The Answer to the above-given question is given below.

A company has several employees, all with different names, who perform interviews with job applicants (one applicant is interviewed by one employee). The job applicants also have different names. The interviewer makes appointments for interviews with the applicants. Each applicant may be interviewed at several occasions, possibly by different interviewers, but in that case the interviews take place during different days. The company has special interview rooms. Each interviewer uses the same room for all interviews during a day. A room may, however, be used by different interviewers during a day, as long as the interviews don't collide in time. The reservation of interview appointments is to be computerized. The database devel- oper has decided to use a single relation for all data, with the following schema: Interviews(interviewer, applicant, day, time, room) a) From the text, find functional dependencies in the relation. b) Find the keys of the relation. c) Show that the relation is in 3NF but not in BCNF. d) Decompose the relation in relations that are in BCNF.

A company has several employees, all with different names, who perform interviews with job applicants (one applicant is interviewed by one employee). The job applicants also have different names. The interviewer makes appointments for interviews with the applicants. Each applicant may be interviewed at several occasions, possibly by different interviewers, but in that case the interviews take place during different days. The company has special interview rooms. Each interviewer uses the same room for all interviews during a day. A room may, however, be used by different interviewers during a day, as long as the interviews don't collide in time. The reservation of interview appointments is to be computerized. The database devel- oper has decided to use a single relation for all data, with the following schema: Interviews(interviewer, applicant, day, time, room) a) From the text, find functional dependencies in the relation. b) Find the keys of the relation. c) Show that the relation is in 3NF but not in BCNF. d) Decompose the relation in relations that are in BCNF.

Computer Networking: A Top-Down Approach (7th Edition)

7th Edition

ISBN:9780133594140

Author:James Kurose, Keith Ross

Publisher:James Kurose, Keith Ross

Chapter1: Computer Networks And The Internet

Section: Chapter Questions

Problem R1RQ: What is the difference between a host and an end system? List several different types of end...

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Question

### Database Normalization and Design Task

A company has several employees, each with unique names, who conduct interviews with job applicants (one applicant is interviewed by one employee). The job applicants also have distinct names. Interviewers schedule appointments for interviews with the applicants. Each applicant may be interviewed multiple times, potentially by different interviewers, but these interviews occur on different days.

The company has designated interview rooms. Each interviewer uses the same room for all interviews in a day. A room can be shared by different interviewers on the same day, provided the interview times do not overlap.

The interview appointment reservations will be computerized. The database developer has opted to use a single relation for all data, defined by the schema:

**Interviews(interviewer, applicant, day, time, room)**

Tasks:
a) From the text, identify functional dependencies in the relation.
b) Determine the keys of the relation.
c) Demonstrate that the relation is in Third Normal Form (3NF) but not in Boyce-Codd Normal Form (BCNF).
d) Decompose the relation into relations that are in BCNF.
e) Extra assignment: Draw an Entity-Relationship (E/R) diagram representing the system. Try to include all dependencies from the text in the diagram, which may be challenging.

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