The Best 2020 Resources for Your Coding Interview Preparation

A personal list for avoiding failure during an important interview

Piero Borrelli
Aug 10 · 5 min read
Image for post
Illustration by Maria Shukshina from Icons8

“Early success is a terrible teacher. You’re essentially being rewarded for a lack of preparation, so when you find yourself in a situation where you must prepare, you can’t do it. You don’t know how.”Chris Hadfield, An Astronaut’s Guide to Life on Earth

I already told a story that makes me relate to a quote like this. About my journey trying to get a job abroad. And how I miserably failed.

And I failed because of a lack of preparation. Because I was ignorant enough to think that a quick recap of basic language concepts would have me landed the job.

To reduce the risk to fail anything in life, as astronauts teach, there’s only one useful principle. Preparation, preparation, preparation.

Know what you will go through, prepare for it, try to anticipate the emotions you will feel and don’t let them govern you during the interview.

Following is a list of the best resources I’ve found for reducing risks of failure and applying the preparation principle in 2020’s coding interviews.


Interview Cake

50+ hours of coding interview questions preparations. Including full break-down solutions, “gotchas” lists and “what we learned” sections. Here you will find all the important building blocks of interviews such as data structures, algorithms, searching and sorting etc.

Interview cake
Interview cake

You can also access their free small glossary articles to get acquainted with the needed technical dictionary.


AlgoExpert (Author’s choice)

Algo expert
Algo expert

This looks extremely interesting and possibly a new tool since all the advertisement it received lately. A detailed overview of 85 of the best programming interview questions in 9 different languages: JavaScript, Python, Swift, C++, Java, C#, Kotlin, Go and TypeScript.

The tool offers a great environment for code execution, support for space-time complexity analysis and professional interview tips.

Plus, they include an incredible service for one of the most underrated interviews questions type: the system design problem. They propose a tool called SystemExpert, which is basically a preparation course on designing large-scale applications.

It features mocked video interviews, fully equipped lessons for all the topics related to designing a system plus real code examples.

Image for post

As of the day of writing this article, for its price and offer, I strongly suggest you subscribe to Algo Expert +System Expert and enjoy having all the stuff you need in a single, fully-equipped environment.


LeetCode

Leet Code
LeetCode

An extremely famous platform among all developers out there. You may want to check it out to practice your skills with real coding interview questions. Supporting over 14 programming languages, LeetCode will provide you over 1600 interview questions, contests and even opportunities to be hired directly via the platform.

Pramp

Pramp
Pramp

Do you suffer from anxiety when talking in front of a person? Or maybe you’re afraid to watch your mind go blank when in front of a real interviewer. Pramp comes in your help with this. It’s a Magnifique peer to peer platform where you can practice solving code problems with another person.

One of you will play the role of the interviewer, and the other one of the person interviewed. And then the roles will be exchanged.

Interviews are live, 1-on-1 video sessions that take place on their website over a collaborative code editor. And they also take care of the scheduling and interview prep content. Plus, you can choose exactly what you would like to practice in your interview, from system design to behavioural questions or simple code.


Educative.io Interview Courses Set

Image for post
Educative.io

Now, instead of listing other 100 of valid courses or resources, you might want to go through, I prefer to give you another single place where you can learn and practice all you need.

It’s just crazy how poor traction I have seen for incredibly good courses such as the ones I’ve seen on Educative.io. They feature lessons on basically any topics you can think of, for a single monthly subscription or yearly access.

And, in particular, they have quite a rich gold mine of interview preparation courses. With explanations and exercises.

This platform is particularly recommended if you don't want to spend excessive amounts of money or if you’re interested in subscribing just for a short period of time.

Here are their interview preparation courses I advice you to go through:

Grokking the Coding Interview: Patterns for Coding Questions

A great list of 16 of the most important patterns you must know to solve any interview question. From linked-lists reversal to Big-O notation and the sliding windows algorithm.

Grokking the Behavioral Interview

This can be considered your interview etiquette for the rest of your days. Learn how to deal with any behavioural interview questions, how to show the best of your personality and the proper manners to correctly ace these types of interviews.

Grokking the System Design Interview

Back on designing systems, this is a great course for preparing and learning how to correctly design, scale and implement an error-prone application.


How to go through all of this

My approach for you to prepare for an interview using one of the listed resources is:

  • Pick one between Algo Expert + System Expert or Interview Cake.
  • Go through the full curriculum, completing every topic and challenge so you get the maximum knowledge possible.
  • Practice, practice and then practice some more both via the courses you bought and with Pramp + Leet Code challenges. Plus, master the behavioural interview etiquette via the course Educative.io provides.

Conclusion

Interviews have become truly hard. Refreshing your mind on data-structures won’t help you land the job of your dreams in the long run. Preparation is success in this kingdom, and you have to be fully ready for any challenge you might face.

As always, thanks for reading and keep the comments flowing with other great resources you believe are valid.

Resources

JavaScript In Plain English

New JavaScript + Web Development articles every day.

Piero Borrelli

Written by

Software developer for the Wifi industry. Burning keyboards with JavaScript code. Defenceless talking about the ups and downs of the developer’s life.

JavaScript In Plain English

New JavaScript + Web Development articles every day.

Piero Borrelli

Written by

Software developer for the Wifi industry. Burning keyboards with JavaScript code. Defenceless talking about the ups and downs of the developer’s life.

JavaScript In Plain English

New JavaScript + Web Development articles every day.

Welcome to a place where words matter. On Medium, smart voices and original ideas take center stage - with no ads in sight. Watch

Follow all the topics you care about, and we’ll deliver the best stories for you to your homepage and inbox. Explore

Get unlimited access to the best stories on Medium — and support writers while you’re at it. Just $5/month. Upgrade

Get the Medium app

A button that says 'Download on the App Store', and if clicked it will lead you to the iOS App store
A button that says 'Get it on, Google Play', and if clicked it will lead you to the Google Play store