A cellular operator needs a database to keep track of its customers, their subscription plans, and the handsets (mobile phones) that they are using. The E- R diagram in Figure 2-24 illustrates the key entities of interest to the operator and the relationships between them. Based on the figure, answer the following questions and explain the rationale for your response. For each question, identify the element(s) in the E-R diagram that you used to determine your answer. a. Can a customer have an unlimited number of plans? b. Assume a handset type exists that can utilize multiple operating systems. Could this situation be accommodated within the model included in Figure 2-24? c. Is the company able to track a manufacturer without maintaining information about its handsets?

A cellular operator needs a database to keep track of its customers, their subscription plans, and the handsets (mobile phones) that they are using. The E- R diagram in Figure 2-24 illustrates the key entities of interest to the operator and the relationships between them. Based on the figure, answer the following questions and explain the rationale for your response. For each question, identify the element(s) in the E-R diagram that you used to determine your answer. a. Can a customer have an unlimited number of plans? b. Assume a handset type exists that can utilize multiple operating systems. Could this situation be accommodated within the model included in Figure 2-24? c. Is the company able to track a manufacturer without maintaining information about its handsets?

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...

See similar textbooks

Similar questions

Please include the eer diagram
Create ER duagram of the foloowing information and also find entity identification, Rekationship identification, Cardianlity identification, Identify attributes.
Swing Jazz Club ERD Problem Follow the Simple Procedure for ERD diagramming to design an ERD using the following user provided information. Remember the ERD will eventually turn into the design for a database from a top down view. Make sure you resolve any many to many conflicts. Label an identifier or primary key and all pertinent attributes given. If an attribute is not readily apparent from the user information, then make one up that makes sense for the particular entity. Therefore, all entities should end up with at least an identifier and another attribute that makes sense. You may use any of the approaches shown by the book, though the ER-Model and Crow’s foot are the most common. Make sure you show entities, relationships, cardinality, and optionality. Swing Jazz Club The Swing Jazz Club teaches swing and jazz dancing and offers both private and group lessons. Swing Jazz charges $60 dollars per hour for a private lesson and $10 dollars per hour for a group lesson.…
Draw the Enhanced Entity–Relationship (EER) model and the relational schema for the case study below: This case study describes a company called HomeCinema, which rents out videos to its members. The first branch of HomeCinema was established in 1982 in Jeddah but the company has now grown and has many branches throughout the country. As HomeCinema has grown, so has the difficulties in managing the increasing amount of data used and generated by the company. To ensure the continued success of the company, the Director of HomeCinema has urgently requested that a database application be built to help solve the increasing problems of data management. The data held on a branch of HomeCinema is the branch address made up of street, city, state, and zip code, and the telephone numbers (maximum of 3 lines). Each branch is given a branch number, which is unique throughout the company. Each branch of HomeCinema has staff, which includes a Manager, one or more Supervisors, and a number of other…
Decipher the business rules for this ER Diagram :
What is the solution for this question ( using data base systems)
Using er assistant create an Entity Relationship Diagram(ERD) with appropriate entries, relevant attributes, and relations to support the following business rules, and write a few lines to defend your erd. You need to design a database to keep track of clubs at a high school. Attributes: A student may only join one club Some students do not join at all Club needs to have one student Need to capture students: Name Address Year of grad All Phone numbers Club name Club advisor Meeting dates