public class Problem5{ // Program to display number of correct and incorrect ans

ID: 3846327 • Letter: P

Question

public class Problem5{

// Program to display number of correct and incorrect answers

public static void main(String []args){

char[] answerKeyFromChars = { 'D', 'B', 'D', 'C', 'C', 'D', 'A', 'E', 'A', 'D' } ;

char[][] studentsAnswersFromChars =

{ { 'A', 'B', 'A', 'C', 'C', 'D', 'E', 'E', 'A', 'D' },

{ 'D', 'B', 'A', 'B', 'C', 'A', 'E', 'E', 'A', 'D' },

{ 'E', 'D', 'D', 'A', 'C', 'B', 'E', 'E', 'A', 'D' },

{ 'C', 'B', 'A', 'E', 'D', 'C', 'E', 'E', 'A', 'D' },

{ 'A', 'B', 'D', 'C', 'C', 'D', 'E', 'E', 'A', 'D' },

{ 'B', 'B', 'E', 'C', 'C', 'D', 'E', 'E', 'A', 'D' },

{ 'B', 'B', 'A', 'C', 'C', 'D', 'E', 'E', 'A', 'D' },

{ 'E', 'B', 'E', 'C', 'C', 'D', 'E', 'E', 'A', 'D' }

} ;

int[][] studentResult= new int[8][2];

// initializing studentResult 2d array to zero where 0th location represents number of correct answers and 1st location represents number of incorrect answers

for(int i = 0; i < studentResult.length; i++)

studentResult[i][0]= studentResult[i][1] = 0;

// Iterating through student 2D array

for(int i = 0; i < studentsAnswersFromChars.length; i++ ){

for(int j = 0; j < studentsAnswersFromChars[i].length; j++){

// checking student answers with key

if(studentsAnswersFromChars[i][j] == answerKeyFromChars[j])

studentResult[i][0]++;

else

studentResult[i][1]++;

}

// displaying student results

System.out.println("Student Results are:");

for(int i = 0; i < studentResult.length; i++){

System.out.println("Student "+ i +" has "+ studentResult[i][0] +" correct "+"and "+ studentResult[i][1] + " wrong answers" );

}

Duplicate your previous project (lab 2 part 1-grade student exams) in Eclipse (or other IDE) First, create a method to grade the student exams gradeExams(). It takes 2 parameters: the answer key (single dimensional array) and the student answers (two dimensional array); displays the results; no return value (void). It should invoke a second method-gradeExam() that takes 2 parameters: the answer key (single dimensional array) and a single dimensional array for a single student's answers; displays the results; no return value (void) Once this works, create 2 more methods: getAnswerkey() and getStudentAnswers() which prompt the user for the corresponding information. getAnswerkey() returns a single dimensional array and getStudentAnswers() returns a two dimensional array. Note: getStudentAnswers() should take a single parameter specifying the number of questions (you can determine the value by looking at the array returned by getAnswerkey())-use this value to check that the user entered the correct number of answers for each student. Use your gradeExams() method to grade the user-supplied info. Recommendation: use Scanner (nextLine()) to read in the answer key as a single string (no spaces between answers) and the String method to convert it to an array of char.

Explanation / Answer