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The typical algorithms that you would learn in a data structures and algorithms class are very common in coding interviews. Not understanding these algorithms could cost you a job. The most important sorting algorithms for interviews are the O(n*log(n) algorithms. Learning these algorithms will also help you understand how to recursively traverse through all the nodes in a tree. If you’re looking for a good resource to learn these algorithms, I recommend picking up a copy of Cracking the Coding Interview which goes over these and more in detail.