Coder Pad interview round for Java backend developer. Interviewer will share a Hackerrank link and will ask us to solve it in screen share. We will need to explain our solution and the interviewer may ask questions on the code you are writing.

package Interviews; /**

• ===================Question===================
• In a college, a student can be identified uniquely with combination of student's first and last name,
• and in a given stream, a student can enroll in one or many subjects. Finally, during evaluations, students are scored for each subject.
• E.g. In Physics subject (see code below), Rahul, Sidd, Monica have scored 40, 50, 30 marks each.
• We need to print the students in descending order of their average marks across subjects.
• Expected output for students in code snippet should be as below:
• Student{firstName='Sidd', lastName='Bhatia', age=30, stream='Science', avgScore=50.0}
• Student{firstName='Neha', lastName='Jain', age=33, stream='Science', avgScore=48.0}
• Student{firstName='Vishal', lastName='Garg', age=24, stream='Commerce', avgScore=44.0}
• Student{firstName='Abhishek', lastName='Kakkar', age=22, stream='Commerce', avgScore=43.0}
• Student{firstName='Rahul', lastName='Garg', age=25, stream='Science', avgScore=43.0}
• Student{firstName='Monica', lastName='Mishra', age=26, stream='Science', avgScore=41.333333333333336}
• Also, please note, the evaluator will give some different input to the program, and the code should produce the expected output for the same.
• ===========================Code snippet================================= */

import java.util.*; import java.util.stream.Collectors;

public class AvgMaxGrade { static Map<String, List> subjectToStudentsMap = new HashMap();

static {
    subjectToStudentsMap.put("Physics", Arrays.asList(
            new Student("Rahul", "Garg", 25,"Science", 40),
            new Student("Sidd", "Bhatia", 30,"Science", 50),
            new Student("Monica", "Mishra", 26, "Science", 30)
    ));
    subjectToStudentsMap.put("Chemistry", Arrays.asList(
            new Student("Rahul", "Garg", 25,"Science", 46),
            new Student("Neha", "Jain", 33,"Science", 48),
            new Student("Monica", "Mishra", 26,"Science", 46)
    ));

    subjectToStudentsMap.put("Maths", Arrays.asList(
            new Student("Vishal", "Garg", 24,"Commerce", 44),
            new Student("Abhishek", "Kakkar",22, "Commerce", 43),
            new Student("Monica", "Mishra", 26,"Science", 48)
    ));
}

public static void main(String[] args) {

//Write your code here }

class Student implements Comparable { String firstName; String lastName; double score; String stream; int age;

public Student(String firstName, String lastName, int age, String stream, double score) {
    this.firstName = firstName;
    this.lastName = lastName;
    this.score = score;
    this.age = age;
    this.stream = stream;
}

@Override
public int compareTo(Object o) {
    Student s2 = (Student) o;
    return Double.compare(s2.score, this.score);
}

@Override
public String toString() {
    return "Student{"
            + "firstName='" + firstName + "'"
            + ", lastName='" + lastName + "'"
            + ", score=" + score
            + ", stream='" + stream + "'"
            + ", age=" + age
            + "}";
}

}