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
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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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