Hi Rizwan,
That's a cool approach for helping someone find their areas of strengths and weaknesses!
If you want to map individual questions to a category, one option to explore could be creating a number variable for each category to keep track of the score for each one.
Once that's done, go to each assessment question and add an Adjust Variable trigger to any response that should increase a category's score. For instance, in the screenshot I've included, selecting the correct answer adds one point to my variable "Category1".
At the end of the self-assessment, create a single screen that displays their points in each category simply by adding variable references to your slide.
