public void delete(String quest) {
questDB.deleteQuestion(quest);
}

public void display() {
questDB.displayQuestion();
}

public void displayAll() {
System.out.println(“Question Catalog: ” + catalog);
questDB.displayAllQuestions();
}

}
Develop another class QuestionFormat
extending the QuestionManager class
QuestionFormat.java
class QuestionFormat extends QuestionManager {

public QuestionFormat(String catalog){
super(catalog);
}

public void displayAll() {

System.out.println(“\n~~~~~~~~~~~~~”);
super.displayAll();
System.out.println(“~~~~~~~~~~~~~~~”);
}}

Develop another class JavaQuestions implementing the “Question” interface:

JavaQuestions.java:

import java.util.*;
class JavaQuestions implements Question {

private List <String> questions =
new ArrayList<String>();

private int current = 0;

public JavaQuestions() {
questions.add(“What is Java? ”);
questions.add(“What is marker interface? ”);
questions.add(“What is cross-platform? ”);
questions.add(“How multiple polymorphism i
s achieved in java? ”);
questions.add(“How many types of exception
handling are there in java? ”);