HubSpot Software Engineer Tech Phone Screen Experience with Codesignal

I got a referral for HubSpot's Online Assessment (OA), a 90-minute codesignal. It wasn't too difficult, but the time was very tight. There were four levels, each worth 250 points, requiring a total of

I got a referral for HubSpot's Online Assessment (OA), a 90-minute codesignal. It wasn't too difficult, but the time was very tight. There were four levels, each worth 250 points, requiring a total of 480 points. However, the platform has its own algorithm; it's not just a simple addition of scores. The questions are: (The following requires a score higher than 188. You can already view it.) The cloud storage question I got was similar; you can search for it on LeetCode. The core idea is a Trie, but with many conditional statements. L1: Implement initialization, storage, deletion, and searching (return file size). L2: Given a file prefix and a number n,

return the top n files with the same prefix based on file size. L3: Each file belongs to a user; implement a merge user function (file ownership is updated after merging). L4 (didn't complete). Overall, it wasn't difficult, but it tested my postgraduate level of proficiency; 90 minutes for four sub-questions was indeed a bit tight. Please give me points. Thank you everyone.