My general sense is that the reason the hiring process at tech companies is so reliant on the kind of technical interview questions that HackerRank makes its mo

My general sense is that the reason the hiring process at tech companies is so reliant on the kind of technical interview questions that HackerRank makes its money off of is largely due to the fact that students can indeed get solutions online to the various problems they're assigned, and thus many computer science degrees are due more to the student's abilities with Google and/or their reliance on private tutors/services to generate solutions. Some teachers might check for plagiarism but it's not hard to make enough changes to any body of code to make something like a diff test in an automated submission pass. Automated solution testing seems to be the norm in computer science courses as well, so it has become relatively easy for students to pass courses with good grades using this approach. There are some ways to avoid some of this, for example having in-class tests where students have to write code out with pencil and paper under a time limit while being observed, but that's only part of the grade usually.