DATABASE CONCEPTS+MYITLAB
DATABASE CONCEPTS+MYITLAB
18th Edition
ISBN: 9780134821245
Author: KROENKE
Publisher: PEARSON C
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Chapter 5, Problem 5.9RQ

Explanation of Solution

Three type of binary relationships:

The binary relationship consists of three types. They are:

  • One-to-one relationship (1:1)
  • One-to-many relationship (1:N)
  • Many-to-many relationship (N:M)

One-to-one relationship (1:1):

  • The simplest type of a binary relationship is one-to-one relationship is one of the types of binary relationship that refer to the relationship between two entities which means one field or record in a table has either zero or one field or record in another table.
  • Let us consider the example:
    • In a college database, each department has only one HOD (Head of Department) and each HOD is assigned to only one department...

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Task 3. i) Compare your results from Tasks 1 and 2. j) Repeat Tasks 1 and 2 for 500 and 5,000 elements. k) Summarize run-time results in the following table: Time/size n String StringBuilder 50 500 5,000
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1. Create a Vehicle.java file. Implement the public Vehicle and Car classes in Vehicle.java, including all the variables and methods in the UMLS. Vehicle - make: String model: String -year: int + Vehicle(String make, String, model, int, year) + getMake(): String + setMake(String make): void + getModel(): String + setModel(String model): void + getYear(): int + set Year(int year): void +toString(): String Car - numDoors: int + numberOfCar: int + Car(String make, String, model, int, year, int numDoors) + getNumDoors(): int + setNumDoors (int num Doors): void + toString(): String 2. Create a CarTest.java file. Implement a public CarTest class with a main method. In the main method, create one Car object and print the object using System.out.println(). Then, print the numberOfCar. Your printing result must follow the example output: make Toyota, model=Camry, year=2022 numDoors=4 1 Hint: You need to modify the toString methods in the Car class and Vehicle class!
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