Question

License test

The Los Angeles driver's license office has asked you to create an application that grades the written portion of the drivers license test. The test has 15 multiple-choice questions. Here are the correct answers

(You may create your own correct answers if you like)

1. C 2. D     3. B 4. A      5. C

6. D 7. B     8. A     9. C     10. D

11. A 12. C   13. D    14. A     15. B

A student must answer 10 of the 15 questions to pass the test.

Write a class named DriverTest that holds the correct answers to the test in an array. The class should also have an array that holds the student's answers. The following methods should be provided.

- Passed. Returns true of the student passes or false if the student fails

- totalCorrect          Returns the total correctly answered.

- totalIncorrect       Returns the total incorrectly answered.

- questionsMissed Returns an array containing the missed questions.

- YourScore           Returns the percentage correct.

Include a separate demo program file that calls the methods from DriverTest.

Valid input: Only the letters A, B, C, or D are acceptable answers to questions.

Program must be in Java

Answer 1

Program Screenshot:

Definition of DriverExan cla33 class DriverExan an array of student's answers private String[] correct Answers- { "A", "В", "С", "В", private String uaeranewers Int [ ] 피133ed " nev int [correctAna wera,Length]; // Constructor publie DriverExam(Stringt] Answers) userAnawera-nev String [Anawera.length for int i-0; i< Anera.length i+) //Implementation of passed ethod public boolean pasaed ) if (totalCorrect >10) return true: else return false; //Implementation of totalcorrect public int totalCorrect( int correctCount0: for inti-0 1< correctanewers.length; 1++) if (userAnsers [i]. equals Ignore Case (correctAnsers [i] )) correctcount++ return correctCount: //Implementation of totalIncorrect publie int total Incorrect () int incorrectCount - 0; for (int í =0; i< correctAnsvers-length; i++) if m1a3ed(incorrectcount1 incorrectCount+t return incorrectcount //Implementation of Missed questions public intri question3M133ed return missed: isport packages import java.util.5canner: public class Ex amDemo public static void main (Stringi arga) Systen.out.println"Driver's License Exam; Scanner kb - ne Scanner (5ysten. in) Syaten.out.println" 15 Multiple choice questiona Mark A, B,C,D .") Inputting string Stringt anawersnew String[151 String anawer: for (int i-0; i < 15: i++) dlo Systen.out.print((i 1) answer b.nextline I while (isvalidAnsver (answer)) anawersianawer f Create an object Ior DriverExan claas DriverExam e-new DriverExam(answersl System. out. print ln (" RESULTS Display the number of correct anawers

/ Display the number of incorrect answers System.out.println ("Number of Incorrect answers: "+ e.totalIncorrect ()) String pa s sed=e.passed () ? "YES" : "NO". // Display the pass or fail System.out.println (" Passed: "+ passed) if (e.totalIncorrect) >0) System.out.println("Missed Questions are:") int missedIndex; for (int i - 0 i< e.totalIncorrect): i++) missedIndex=e.questionsMi s sed () [1] System.out.print (""t missedIndex): + 1; public static boolean isValidAnswer (String answer) return "A".equalsIgnoreCase (answer) I I "B".equalsIgnoreCase (answer) "C".equalslgnoreCase (answer) II "D".equalsIgnoreCase (answer)

Sample Output:

Driver's License Exam 15 Multiple choice questions Mark A,B,C,D . 3: b 5: d 6: C 7: b 8: a 9: C 10: d 11: C 12: b 13: a 14: d 15: C RESULTS Number of correct answers: 8 Number of Incorrect answers: Passed: NO Missed Questions are: 3 46 8 12 14 15

Code to copy:

// Definition of DriverExam class
class DriverExam
{
   // an array of student's answers.
   private String[] correctAnswers = { "A", "B", "C", "B",
           "D", "A", "B", "D", "C", "D", "C",
           "C", "A", "A", "B" };
   private String[] userAnswers;
   int[] missed = new int[correctAnswers.length];
   // Constructor
   public DriverExam(String[] Answers)
   {
       userAnswers = new String[Answers.length];
       for (int i = 0; i < Answers.length; i++)
       {
           userAnswers[i] = Answers[i];
       }
   }

   //Implementation of passed method
   public boolean passed()
   {
       if (totalCorrect() >= 10)
           return true;
       else
           return false;
   }

   //Implementation of totalCorrect
   public int totalCorrect()
   {
       int correctCount = 0;
       for (int i = 0; i < correctAnswers.length; i++)
       {
           if (userAnswers[i].equalsIgnoreCase(correctAnswers[i]))
           {
               correctCount++;
           }
       }
       return correctCount;
   }
  
   //Implementation of totalIncorrect
   public int totalIncorrect()
   {
       int incorrectCount = 0;

       for (int i = 0; i < correctAnswers.length; i++)
       {
           if (!userAnswers[i].equalsIgnoreCase(correctAnswers[i]))
           {
               missed[incorrectCount] = i;
               incorrectCount++;
           }
       }
       return incorrectCount;
   }

   //Implementation of Missed questions.
   public int[] questionsMissed()
   {
       return missed;
   }
}

-------------------------------------------------------------------

// import packages
import java.util.Scanner;

public class ExamDemo
{
   public static void main(String[] args)
   {
       System.out.println("   Driver's License Exam   ");
       Scanner kb = new Scanner(System.in);

       System.out.println(" 15 Multiple choice questions Mark A,B,C,D .");
       // Inputting string
       String[] answers = new String[15];
       String answer;
       for (int i = 0; i < 15; i++)
       {
           do
           {
               System.out.print((i + 1) + ": ");
               answer = kb.nextLine();
           } while (!isValidAnswer(answer));
           answers[i] = answer;

       }
       // Create an object for DriverExam class
       DriverExam e = new DriverExam(answers);
       System.out.println("       RESULTS        ");
       // Display the number of correct answers
       System.out.println("Number of correct answers: " + e.totalCorrect());
       // Display the number of incorrect answers
       System.out.println("Number of Incorrect answers: " + e.totalIncorrect());
       String passed = e.passed() ? "YES" : "NO";
       // Display the pass or fail
       System.out.println("Passed: " + passed);
       if (e.totalIncorrect() > 0)
       {
           System.out.println("Missed Questions are:");
           int missedIndex;
           for (int i = 0; i < e.totalIncorrect(); i++)
           {
               missedIndex = e.questionsMissed()[i] + 1;
               System.out.print(" " + missedIndex);
           }
       }
   }

   public static boolean isValidAnswer(String answer)
   {
       return "A".equalsIgnoreCase(answer) || "B".equalsIgnoreCase(answer) || "C".equalsIgnoreCase(answer)
               || "D".equalsIgnoreCase(answer);
   }
}