Given a Student class, and UndergradCourse is a true subtype of Course, there is one method called recommend in the Student class: public class Student { public Course recommend(Course pCourseID); } Please evaluate if EACH of the method in UndergradStudent class violates the Liskov Substitution Principle. public class UndergradStudent extends Student { 1. public Course recommend(UndergradCourse pCourseID); 2. public UndergradCourse recommend(Course pCourseID); 3. public UndergradCourse recommend(Object pCourseID); 4. public Course recommend(Course pCourseID) throw SomeCheckedException;
Given a Student class, and UndergradCourse is a true subtype of Course, there is one method called recommend in the Student class: public class Student { public Course recommend(Course pCourseID); } Please evaluate if EACH of the method in UndergradStudent class violates the Liskov Substitution Principle. public class UndergradStudent extends Student { 1. public Course recommend(UndergradCourse pCourseID); 2. public UndergradCourse recommend(Course pCourseID); 3. public UndergradCourse recommend(Object pCourseID); 4. public Course recommend(Course pCourseID) throw SomeCheckedException;
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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Given a Student class, and UndergradCourse is a true subtype of Course, there is one method called recommend in the Student class:
public class Student {
public Course recommend(Course pCourseID);
}
Please evaluate if EACH of the method in UndergradStudent class violates the Liskov Substitution Principle.
public class UndergradStudent extends Student {
1. public Course recommend(UndergradCourse pCourseID);
2. public UndergradCourse recommend(Course pCourseID);
3. public UndergradCourse recommend(Object pCourseID);
4. public Course recommend(Course pCourseID) throw SomeCheckedException;
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