A full mock is useful when you can name the step that failed.
NuRhoN looks at the working you upload, not only the option you marked. A missed JEE question is tagged as conceptual, procedural, or systematic, so the next practice set stays on that gap.
More than a score
A traditional mock tells you how many questions you got right. NuRhoN examines the solution process: the line where the reasoning broke, the calculation that drifted, and the pattern that repeats across Physics, Chemistry, and Mathematics.
You understand what you got wrong, and why. That is the difference between another score and a diagnosis you can practise.
Multi-correct questions and numerical items are read the same way. The tag follows the item type, so a partial multi-correct attempt is still a diagnosis, not a blank.
After the paper
Save the attempt and come back to it. Look at the error pattern, then take a chapter-wise or weak-area set instead of sitting another full paper the same day.
Full-length and chapter-wise mocks both fit the same loop: diagnose, practise, update, improve. A chapter mock is enough when one unit is shaky. A full-length mock is for the week when you need to see how those units hold together under time.
When the clock is the problem
Timed practice shows which step breaks when the clock is running. Upload the working you actually did. The first break in the solution is the step to practise before the next mock, not a longer paper.
JEE Main and JEE Advanced practice can share this habit. The paper changes. The question after the mock stays the same: which step failed, and what will you attempt next?