CS 1102 Unit 5 Programming Assignment In This Assignment You

Cs 1102 Unit 5 Programming Assignmentin This Assignment You Will Ag

This assignment involves modifying an existing Quiz program by introducing an abstract class called "Question" and creating subclasses "MultipleChoiceQuestion" and "TrueFalseQuestion." The task requires restructuring your classes to leverage inheritance and polymorphism in Java. You will create the "Question" class with shared variables and methods, update "MultipleChoiceQuestion" to extend "Question," and implement a new "TrueFalseQuestion" class. Additionally, adjustments in the quiz logic will ensure that all question types are handled uniformly using the "Question" type. You will also add several true/false questions to your quiz, ensuring the program correctly accepts answers, tracks scores, and displays appropriate results.

Paper For Above instruction

The purpose of this programming assignment is to demonstrate and reinforce understanding of inheritance, abstract classes, and polymorphism in Java. The task requires transforming a procedural question-and-answer quiz into a more scalable and flexible object-oriented design. This implementation allows the quiz to handle different question types seamlessly, leveraging the power of inheritance and method overriding, which are foundational concepts in object-oriented programming.

To begin, the creation of the abstract "Question" class serves as the backbone for all question types. In Java, an abstract class cannot be instantiated directly but can provide common variables, methods, and abstract method declarations that subclasses must implement. The "Question" class will include static variables "nQuestions" and "nCorrect" to track total questions asked and correctly answered, respectively. Instance variables like "question" and "correctAnswer" will be inherited by subclasses for specific question details. The "check" method will use the "ask" method, which is declared abstract within "Question" and must be implemented uniquely in each subclass. The "showResults" static method will display the cumulative quiz results.

Modifying the "MultipleChoiceQuestion" class involves declaring it as a subclass of "Question" using the "extends" keyword. All duplicate variables and methods from "MultipleChoiceQuestion" that are now included in "Question" should be removed. The constructor and "ask" method in "MultipleChoiceQuestion" remain unchanged, ensuring the class functions correctly within the new inheritance hierarchy. This reorganization allows referencing "MultipleChoiceQuestion" objects via "Question" variables, promoting polymorphism. Testing this change involves running the quiz to verify that it behaves identically, with questions still initializing correctly and responses processed accurately.

Next, a new subclass "TrueFalseQuestion" is implemented. This class extends "Question" and provides specific behavior for true/false questions. The "ask" method will repeatedly prompt users using JOptionPane until a valid response is entered, accepting variations like "t", "f", "yes", "no", etc. User inputs are transformed into standardized responses "TRUE" or "FALSE" to simplify answer checking. A constructor accepting the question text and correct answer is added, prefixing "TRUE or FALSE: " to the question text for clarity. Correct answer validation ensures only "TRUE" or "FALSE" is stored, regardless of input casing or format.

After implementing the class, test the quiz by creating an instance of "TrueFalseQuestion" with sample questions. Verify that only valid answers are accepted and that the current score and question count are accurately maintained. Subsequently, add four more true/false questions to reach a total of at least five of each type. Run the quiz to ensure all questions are processed correctly, answers are validated, and results are displayed accurately. This process consolidates object-oriented principles and enhances the modularity and scalability of the quiz program.

In conclusion, this assignment enhances understanding of inheritance, abstract classes, and method overriding in Java. By refactoring existing code into a hierarchical class design, students learn to build flexible software systems that can easily accommodate new features—such as additional question types—without significant rewriting. The real-world relevance of such design patterns is significant in large software projects where code reuse and clarity are paramount. This exercise not only solidifies core programming skills but also prepares students for more complex object-oriented design challenges in professional development environments.

References

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