DATABASE SYSTEMS (LOOSELEAF)-W/MINDTAP
13th Edition
ISBN: 9781337761833
Author: Coronel
Publisher: CENGAGE L
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Expert Solution & Answer
Chapter 4, Problem 7P
Explanation of Solution
Entity Relational (ER) Diagram:
The following figure illustrates the ER Diagram for given business rules using Crow’s Foot notation:
Explanation:
The above ERD, contains several entities such as “VOLUNTEER”, “ASSIGNMENT”, “LIST”, “ACTION”, “ITEM”, “PACKAGE_CONTENT” and “PACKAGE”. Each entity has its own attributes.
- A volunteer can have assignment for several tasks. Similarly, a task can be done by several volunteers. Hence the relationship between the entities “VOLUNTEER” and “ACTION” is M: N...
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Task 2: Comparable Interface and Record (10 Points)
1. You are tasked with creating a Java record of Dog (UML is shown below). The dog record
should include the dog's name, breed, age, and weight. You are required to implement the
Comparable interface for the Dog record so that you can sort the records based on the dogs'
ages. Create a Java record named Dog.java.
name: String
breed: String
age: int
weight: double
+ toString(): String
>
Dog
+ compareTo(otherDog: Dog): int
>
Comparable
2. In the Dog record, establish a main method and proceed to generate an array named
dogList containing three Dog objects, each with the following attributes:
Dog1: name: "Buddy", breed: "Labrador Retriever", age: 5, weight: 25.5
Dog2: name: "Max", breed: "Golden Retriever", age: 3, weight: 30
Dog3: name: "Charlie", breed: "German Shepherd", age: 2, weight: 22
3. Print the dogs in dogList before sorting the dogList by age. (Please check the example
output for the format).
•
4. Sort the dogList using…
The OSI (Open Systems Interconnection) model is a conceptual framework that standardises the functions of a telecommunication or computing system into seven distinct layers, facilitating communication and interoperability between diverse network protocols and technologies. Discuss the OSI model's physical layer specifications when designing the physical network infrastructure for a new office.
In a network, information about how to reach other IP networks or hosts is stored in a device's routing table. Each entry in the routing table provides a specific path to a destination, enabling the router to forward data efficiently across the network. The routing table contains key parameters determining the available routes and how traffic is directed toward its destination. Briefly explain the main parameters that define a routing entry.
Chapter 4 Solutions
DATABASE SYSTEMS (LOOSELEAF)-W/MINDTAP
Ch. 4 - Prob. 1RQCh. 4 - What is a strong (or identifying) relationship,...Ch. 4 - Prob. 4RQCh. 4 - Suppose you are working within the framework of...Ch. 4 - Prob. 6RQCh. 4 - Prob. 7RQCh. 4 - Discuss the difference between a composite key and...Ch. 4 - What two courses of action are available to a...Ch. 4 - What is a derived attribute? Give an example. What...Ch. 4 - Prob. 11RQ
Ch. 4 - Discuss two ways in which the 1:M relationship...Ch. 4 - Prob. 13RQCh. 4 - Prob. 14RQCh. 4 - Briefly, but precisely, explain the difference...Ch. 4 - What are multivalued attributes, and how can they...Ch. 4 - Prob. 17RQCh. 4 - Prob. 18RQCh. 4 - What two attributes must be contained in the...Ch. 4 - Describe precisely the composition of the...Ch. 4 - Prob. 21RQCh. 4 - Prob. 1PCh. 4 - Create a complete ERD in Crows Foot notation that...Ch. 4 - Prob. 4PCh. 4 - Prob. 5PCh. 4 - Prob. 6PCh. 4 - Prob. 7PCh. 4 - Prob. 8PCh. 4 - Prob. 9PCh. 4 - Prob. 10PCh. 4 - Prob. 11C
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