Static vs Dynamic Arrays
Interview Practice

Interview Basics: Static vs. Dynamic Arrays

Arrays are one of the most basic data structures in computer science. But they form the basis of some difficult technical interview questions! So no matter where you are in your programming career, you need

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Interview Practice

Interview Basics: Reverse a Linked List

Reversing a linked list is a very common task in technical interviews. That’s why we devote a whole section of Interview Practice to them! Being able to solve this question easily is a great way

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boomx's Beautiful JavaScript Solution
CodeSignal News

Beautiful JavaScript Winner Code Walkthrough

“It’s rewarding. It feels good to come up with a solution, and just to in general practice how you approach solving problems.” – Beautiful JavaScript winner boomx on CodeSignal The CodeSignal Beautiful JavaScript contest wrapped

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Beautiful JavaScript Challenge
CodeSignal News

Beautiful JavaScript Contest Winners

The Beautiful JavaScript contest was an amazing event. We got over 500 solutions from our awesome CodeFighter community! It ended up being really hard to narrow our list of favorites down to just three. But

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CodeFights Arcade Database World
CodeSignal News

Introducing the CodeSignal Arcade Database World

The ability to access, understand, and manipulate data is extremely important in the current engineering job market. Employers are increasingly listing SQL as a “required skill” in job listings, whether the job is a back-end

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New Interview Practice Topics: Graphs, Advanced Trees, RegEx
CodeSignal News

Interview Practice: Graphs, Advanced Trees & RegEx

We’ve just added three-brand new computer science topics to Interview Practice! Get ready to dive deep on Graphs, Trees: Advanced, and RegEx. We’ve added these topics to our Extra Credit learning plan, which covers all of the topics

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Intro to Hash Tables

Hash tables are a must-know data structure for technical interviews. They’re used to store unordered collections of (key, value)pairs, in which the key must be unique. Item lookup by key, inserting a new item, or deleting an

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Beautiful JavaScript Challenge
CodeSignal News

Join the Beautiful JavaScript Challenge!

Check out the Beautiful JavaScript challenge on CodeSignal! You must submit your solution by noon on July 26. See the Official Rules at the end of this post for more details. At CodeSignal, we heart JavaScript. A

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Ace your next technical interview!
CodeSignal News

Ace Your Next Interview With CodeSignal

You know that you need to prepare for technical interviews – right? Of course you do! Companies rely on technical interviews to weed out people who can’t cut it. And for qualified candidates, they’re used to

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