import java.util.*;
class Student{
    String name;
    int marks1;
    int marks2;
    int marks3;
    int average;
    Student(String name,int marks1,int marks2,int marks3,int average){
    this.name=name;
    this.marks1=marks1;
    this.marks2=marks2;
    this.marks3=marks2;
    this.average=average;
    }
    public String getName(){
        return name;
    }
    public int getMarks1(){
        return marks1;
    }
    public int getMarks2(){
        return marks2;
    }
    public int getMarks3(){
        return marks3;
    }
    public int getAverage(){
        return average;
    }
}
class StudentEx 
{
    public static void main(String[] args) 
    {
        Scanner input=new Scanner(System.in);
        ArrayList<Student> list=new ArrayList<Student>();
        for(int i=0;i<25;i++){
            System.out.print("Enter Name: ");
            String name=input.next();
            System.out.print("Enter Marks1: ");
            int m1=input.nextInt();
            System.out.print("Enter Marks2: ");
            int m2=input.nextInt();
            System.out.print("Enter Marks3: ");
            int m3=input.nextInt();
            int total=m1+m2+m3;
            int av=total/3;
            list.add(new Student(name,m1,m2,m3,av));
        }
        for(Student st:list){
            System.out.println(st.getName()+"\t"+st.getAverage());
        }
    }
}

import java.util.*;

class StudentData{
    int id;
    String name;
    int marks;

    StudentData(int id,String name,int marks){
        this.id=id;
        this.name=name;
        this.marks=marks;
    }
    public int getId(){
        return id;
    }
    public String getName(){
        return name;
    }
    public int getMarks(){
        return marks;
    }

    public static void main(String[] args){
        int count=0;
        LinkedList<StudentData> list=new LinkedList<StudentData>();
        Scanner input=new Scanner(System.in);

        for(int i=0;i<5;i++){
            System.out.print("Enter ID: ");
            int id=input.nextInt();
            System.out.print("Enter Name: ");
            String name=input.next();
            System.out.print("Enter Marks: ");
            int m=input.nextInt();

        list.add(new StudentData(id,name,m));
        }

       for(StudentData data:list){
            if(data.getMarks()>=60){
                count++;
            }
       }
       System.out.println("Number of students obtained 60 or above: "+count);

        System.out.print("Enter id to display record: ");
        int rec=input.nextInt();
        for(StudentData data:list){
            if(data.getId()==rec){
            System.out.println(data.getId()+"\t"+data.getName()+"\t"+data.getMarks());
            }
        }
    }
}

Java Interview Questions and their Answers