Given the following class definitions and a declaration of Book b = new Dictionary() which of the following will cause a compile-time error?

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 the following class definitions and a declaration of Book b = new Dictionary() which of the following will cause a
compile-time error?
public class Book
{
public String getISBN()
{
}
// implementation not shown
// constructors, fields, and other methods not shown
}
public class Dictionary extends Book
{
public String getDefinition()
// implementation not shown
}
O b.getDefintion();
O b.getISBN():
O ((Dictionary) b).getDefinition();
Transcribed Image Text:Given the following class definitions and a declaration of Book b = new Dictionary() which of the following will cause a compile-time error? public class Book { public String getISBN() { } // implementation not shown // constructors, fields, and other methods not shown } public class Dictionary extends Book { public String getDefinition() // implementation not shown } O b.getDefintion(); O b.getISBN(): O ((Dictionary) b).getDefinition();
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