10 Free DSA resources to crack any interview

10 Free DSA resources to crack any interview

Data structures and algorithms are very important for writing effective and performant programs. To get into your dream company, your DSA should be really good. They matter a lot in your day-to-day activities too, they help you develop problem-solving skills. You get an understanding of complex constraints and enhance your logical thinking through DSA only. Data structures and algorithms are the foundation of software development, studying them will necessitate a great deal of critical thinking and brain workout.

So, if you’re looking for free resources to crack an interview for your dream company, this is the right place for you! We’ll list down 10 free resources to help you get your dream job. They’re categorized into three categories:- Online platforms, books, and Youtube channels.

Online platforms

Here is a list of online coding platforms that have various courses as well as set-up questions for you to practice. These platforms have a consistency streak so that you can hold yourself accountable, and daily contests so that you can test where you stand.


No matter a beginner or an expert, everyone knows about this site. It has various free articles to start studying for algorithms and plenty of questions to practice. If you get stuck on any question, you’ll get multiple solutions in multiple languages, hence enhancing your vision.

You can also contribute to the articles and the code.


It has one of the best collections of filtered problems for various tech companies. It has very great community support. You can solve the question and then go for discussion section as well to see other people’s solutions and how you can improve.

You can choose your question according to the ratings too. You can opt-in to its “study plan”, wherein you’ll have daily questions based on the concepts. It has a great user base.


I know, you know, everybody knows, this is the most used platform by company recruiters. During the hiring process, most of the time you’ll get a Hackerrank test link. It has a very good number of problems as well as various articles to understand the concepts.

Start practicing with HackerRank, you’ll be in the right boat!

Codechef and Codeforces

If you’re someone who is confident about your problem-solving skills, then you should definitely opt for the contests that are held on these platforms. You’ll compete among the best.

If you’re a competitive programmer, I know this one is your favorite.


Some people like to refer to books while learning, for them, I have curated this list to learn DSA.

Grokking Algorithms

This book by Aditya Bhargava has every topic with a very detailed explanation. It’s great for people looking to broaden their knowledge. Easy to read, it has very simple language to explain hard things.

Very well illustrated and a must-read.

Introduction to Algorithms

It has a very nicely optimized concept for readers. Many people use this book as a reference to get into algorithms. You’ll get a core-level understanding by reading this.

Written by Thomas H. CormenCharles E. LeisersonRonald L. RivestClifford Stein.

Data Structures and Algorithms Made Easy

Written by Narasimha Karumanchi, has a solution to all the complex questions related to data structures and algorithms.

It comes in very handy as an interview and exam guide.

Youtube channels

Youtube channels prove to be a great asset while learning DSA. They’ll provide you with questions too and its working so that you can trace how it goes and identify the patterns of the questions.

Abdul Bari

Abdul Bari‘s youtube channel is very useful to learn concepts. His material is extremely in-depth and covers various algorithms.

His playlist will definitely help you crack your interview.


If you are a beginner, I’d strongly suggest you this channel. Their playlists have everything that a beginner should know. They’ll give you practical knowledge too.

They’ll tell you how to identify the pattern of the problem and then solve it.


FreeCodeCamp has various videos to give you in-depth knowledge and implementation in data structures and algorithms. They’ve got various lengthy courses on their youtube channel.


We just learned about 10 free resources that’ll help you crack any interview. Choose any resource and get started.

Beginners often get confused about which resource to choose. The key is to just focus on the implementation rather than the collection of resources. If you’ll refer to too many resources at the same time, you’ll get confused. So after learning any algorithms, try hands-on coding, then only you’ll know the practical knowledge.

There are too many free resources for DSA, you don’t have to buy any courses. Believe in yourself and keep preparing consistently.

All the best and thanks for reading!

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