Placement prep, sharpened
Most platforms tell you whether the tests passed. CodeMentor tells you what a reviewer would say, adjusts the next problem to your real level, and remembers the pattern you keep repeating.
A senior engineer's read on your code: complexity, readability, edge cases — scored across five dimensions, not one pass/fail bit.
A rolling weighted average moves each topic's tier independently. Tier 4 in arrays and tier 2 in graphs is a normal profile, not a bug.
Every review leaves a note. Come back in a week and the tutor already knows the mistake you keep making.