You do not need to finish every single technical problem they give you in order to receive an offer. I received a coding sample and a total of 6 technical interviews. I did not complete the coding sample, the design problem, and 3 of the other technical problems. I used Cracking the Coding Interview book to begin my review of data structures and algorithms. From there, practice coding on LeetCode. Begin with the Easy questions. Once you’re more familiar and comfortable, try the Medium problems. You’ll most likely receive Medium over Hard questions since you only have 45 minutes per interview. The concepts I utilized the most during my interviews were object-oriented design, dictionaries/hash tables, and sets.
