just got through the CVS Health online assessment / coding interview section so posting this while it's fresh. searched for this before going in and couldn't find much.
the OA was on HackerRank, timed at 90 minutes, 3 problems. here's roughly what the difficulty split looked like for me: problem 1: easy. string manipulation, basically warm-up level. finished in maybe 10 minutes problem 2: medium. something involving arrays and frequency counting, very standard LeetCode medium territory problem 3: harder medium, verging on hard. graph or tree traversal, i don't want to post the exact problem but it required thinking through edge cases carefully
you write in whatever language you prefer. i used python. no system design or SQL in the OA for this role (backend SWE entry-level).
my actual take: if you've been doing consistent LeetCode practice, medium difficulty stuff, you should be fine on problems 1 and 2. problem 3 might require a bit of hustle depending on what you get. the main thing is time management. i spent too long on problem 3 and ran out of time on some edge cases.
one thing i noticed: the platform was clean, no weird technical glitches. and the instructions were clear about what language and format to use. CVS doesn't seem to be pulling nasty tricks here, the assessment is pretty straightforward.
after the OA they said results would be reviewed within a week. i heard back in 5 days with a technical phone screen invite.
if you're prepping: definitely do standard LeetCode medium arrays, strings, trees, graphs. nothing exotic. HIPAA or healthcare knowledge doesn't come up in the OA, that's more for the system design stage.