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Assume we have 4 classes: 1. Person 2. Teacher 3. Student 4. PhDStudent Teacher and Student are both subclasses of Person. PhDStudent is a subclass of Student. 1. Draw a class inheritance tree using your favorite drawing program or a piece of paper and a pen. You will need to explain. 2. Which of the following assignments are legal, and why or why not? Write down your explanations. a) Person p1 = new Student(); b) PhDStudent phd1 = new Student();

Assume we have 4 classes: 1. Person 2. Teacher 3. Student 4. PhDStudent Teacher and Student are both subclasses of Person. PhDStudent is a subclass of Student. 1. Draw a class inheritance tree using your favorite drawing program or a piece of paper and a pen. You will need to explain. 2. Which of the following assignments are legal, and why or why not? Write down your explanations. a) Person p1 = new Student(); b) PhDStudent phd1 = new Student();

Database System Concepts
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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Assume we have 4 classes: 1. Person 2. Teacher 3. Student 4. PhDStudent Teacher and Student are both subclasses of Person. PhDStudent is a subclass of Student. 1. Draw a class inheritance tree using your favorite drawing program or a piece of paper and a pen. You will need to explain. 2. Which of the following assignments are legal, and why or why not? Write down your explanations. a) Person p1 = new Student(); b) PhDStudent phd1 = new Student();
Transcribed Image Text:Assume we have 4 classes: 1. Person 2. Teacher 3. Student 4. PhDStudent Teacher and Student are both subclasses of Person. PhDStudent is a subclass of Student. 1. Draw a class inheritance tree using your favorite drawing program or a piece of paper and a pen. You will need to explain. 2. Which of the following assignments are legal, and why or why not? Write down your explanations. a) Person p1 = new Student(); b) PhDStudent phd1 = new Student();
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