[daemonologist]

I'm not big into this style of study (would usually rather do projects), but when I do want to grind HackerRank has been the site I use.

I think the biggest point that could be improved is question quality, particularly for curated questions sets/prep kits where my expectations are higher. It's not uncommon to run into an edge case that's tested for but not specified in the problem, or some deficiency with the question itself (I've seen "fix the bug" questions with "from scratch" code provided, or vice versa).

Another thing which could be really valuable are challenges in big codebases - add feature X to some open source project or whatever. Curated/teaching versions of this kind of exercise are hard to come by and would serve as a middle ground between the usual toy problems and in-practice software engineering.

[rvivek]

Super good feedback. It’s on top of our list to move to more real-world set up like how you are mentioning