Java Language Only

**Mandatory**

**Make clear UML diagram for the following code**

Will Thumbs up good work thanks!!

If not able to please tell me why

import java.io.*; public class DriverExam { final char answers[] = {'B','D','A','A','C','A','B','A','C','D','B','C','D','A','D','C','C','B','D','A'}; //Assigned answers array boolean passed(char input[])// This function displays whether passes or failed { int correct=0,i;//Variable declaratoion for(i=0;i<20;i++)//Looping for 20 times { if(input[i]==answers[i])//Matches input answers to the actual answers correct++; } if(correct>=15)//Pass Condition. Returns true if false else fail return true; else return false; } int totalCorrect(char input[])//Calculates and returns total correct answers { int correct=0,i; for(i=0;i<20;i++)//Loop 20 times { if(input[i]==answers[i])//Matches input answers to the actual answers correct++;//If match found increment correct answers count } return correct; } int totalIncorrect(char input[])//Calculates and returns total incorrect answers { int incorrect=0,i; for(i=0;i<20;i++) { if(input[i]!=answers[i]) incorrect++; } return incorrect; } int[] questionMissed(char input[])//Find the questions incorrectly answered { int missed[]=new int[20]; int cnt=0,i; for(i=0;i<20;i++)//Initialize all elements of missed to -1 { missed[i]=-1; } for(i=0;i<20;i++)//Loop 20 times { if(input[i]!=answers[i])//Matches input answers to the actual answers { missed[cnt]=i+1;//If match not found store question number in array. Remember question number is always 1 more than index(variable i) as 'i' starts from 0 but question nos start from 1. cnt++; } } return missed; } public static void main(String[] args)throws IOException { BufferedReader in = new BufferedReader(new InputStreamReader(System.in));//Alternatively use scanner class for user input //Scanner class for user input DriverExam ob = new DriverExam();//Object Creation int i,correct,incorrect;int missed[]; char input[] = new char[20];boolean result; System.out.println("Enter Answers: ");//Accept user answers for(i=0;i<20;i++) { do { System.out.print("Q."+(i+1)+": "); input[i]=(in.readLine()).charAt(0); if(input[i]!='A' && input[i]!='B' && input[i]!='C' && input[i]!='D')//InputValidation { System.out.println("Invalid Answer. Enter a valid Answer."); } }while(input[i]!='A' && input[i]!='B' && input[i]!='C' && input[i]!='D'); } //Function calls result = ob.passed(input); correct = ob.totalCorrect(input); incorrect = ob.totalIncorrect(input); missed = ob.questionMissed(input); //Display Results if(result == true) System.out.println("Result: Passed"); else System.out.println("Result: Failed"); System.out.println("Number of Correct Answers: "+correct); System.out.println("Number of InCorrect Answers: "+incorrect); if(missed[0]==-1) { System.out.print("Questions Missed: NA"); } else { System.out.print("Questions Missed: "+missed[0]); i=1; while(missed[i]!=-1) { System.out.print(", "+missed[i]); i++; } } } }