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
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
“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
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
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
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
You asked, and we listened! Over the past few weeks, we’ve added support for 14 more programming languages to the CodeSignal platform. The new languages on CodeSignal are: C Clojure CoffeeScript Common Lisp D Elixir
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
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
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
