Second Attempt at Quiz

Graded question slides in Storyline 360 work like they did in Storyline 3.

For graded question slides, it's best to have the Slide Properties set to "Automatically Decide." That takes advantage of the built-in functionality: It doesn't let the user change an answer if they review the quiz. It does let them change the answer if they retry the quiz. 

When you set Attempts to anything >1, the program automatically adds a Try Again layer. If the user answers incorrectly, the Try Again layer will show until they reach the maximum allowed attempts. After that, another incorrect answer will show the Incorrect layer. When you set it for Unlimited attempts, the user has to keep trying until they get the correct answer. In other words, the Incorrect layer will never show. (The Correct layer will show if they answer correctly.) 

Note that program looks for layers named Correct and Incorrect. If you change those names, the program can't automatically show the appropriate layer. 

Also, be sure that you've indicated the correct answer for each question. In Slide View, that shows as the button looking selected when you're editing. In Form View, the correct item should be selected in the Correct column.