---
title: "Comment by Saurav J on \"Essential Data Structures for your upcoming Android interview - Part 1\" | Hashnode"
description: "Much needed. I was stuck in one round because of using hash map instead of set. Thanks :)"
url: "https://hashnode.com/posts/essential-data-structures-for-your-upcoming-android-interview-part-1/648f1d46e256ab2098305baf/comment/64900d67018fec138a9a9c42"
---

[Discussion](https://hashnode.com/posts/essential-data-structures-for-your-upcoming-android-interview-part-1/648f1d46e256ab2098305baf)

Comment [Essential Data Structures for your upcoming Android interview - Part 1](https://hashnode.com/posts/essential-data-structures-for-your-upcoming-android-interview-part-1/648f1d46e256ab2098305baf)

[Saurav J](https://hashnode.com/@Saurav102)

[Jun 19, 2023](https://hashnode.com/posts/essential-data-structures-for-your-upcoming-android-interview-part-1/648f1d46e256ab2098305baf/comment/64900d67018fec138a9a9c42)

Much needed. I was stuck in one round because of using hash map instead of set. Thanks :)

[Satyajit Das](https://hashnode.com/@Satyajitdas)

[Jun 19, 2023](https://hashnode.com/posts/essential-data-structures-for-your-upcoming-android-interview-part-1/648f1d46e256ab2098305baf/comment/64900d67018fec138a9a9c42#reply-64901090018fec138a9a9c9a)

Agree. Sometimes using the wrong data structure can be too much expensive.