Fiserv Java Developer Interview Question for Experienced Professionals 2024.

Hello folks, I would like to share my recent Java interview experience with one of the fintech companies called Fiserv. Banking and finance companies have a very tough interview process. This is for Java developers who have 3–8 years of experience and can go through this to crack their interviews. I hope this actual transcript will help you. Let's dive into the actual interview.

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Is it possible to add three objects of the same Employee class (e1, e2, e3) and two objects of the Department class (d1, d2) to a TreeSet? What will happen if I attempt to print those objects using System.out.println?

Below is the program

package com.test.springdataflowtest;

import java.util.*;


public class TreeSetExample {
    public static void main(String[] args) {
        TreeSet<Object> treeSet = new TreeSet<>();

        Employee e1 = new Employee(101, "John");
        Employee e2 = new Employee(102, "Alice");
        Employee e3 = new Employee(103, "Bob");

        Department d1 = new…