Dima's Student

import java.util.Random;

public class Student {
    int mark;
    String name;
    String group;

    Student(String name, String group) {
        this.name = name;
        this.group = group;
        assignRandomExamMark();
    }

    void assignRandomExamMark() {
        Random random = new Random();
        mark = random.nextInt(4) + 2;
    }
}