class Manager extends Employee implements Executive { } The class Manager is extending another…

Answered: 1. Write the class declaration of…

1. Write the class declaration of Manager. 2. What is wrong with this? Executive el - new Executive () ; 3. Which is right? Employee e2 - new Engineer () ; OR Engineer e2 - new Employee ();

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Question

<<interfac
Employee
Executiv
Manager
Engineer
1. Write the class declaration of Manager.
2. What is wrong with this?
Executive el = new Executive () ;
Ja Va
3. Which is right?
Employee e2 = new Engineer ();
OR
Engineer e2 = new Employee () ;
4. Which is right?
Executive e3 = new Employee ();
OR
Engineer e3 = new Manager ();
5. Draw the UML diagram from the class declaration below.
package mycity;
class Staff ( )
public class EMs extends Staff implements Specialized,
Insurable ( )
6. Write the class code Retiree that is a subclass of Person, and it implements
Comparable interface. It is full class code that MUST be compilable.

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