Please guide me for pre exam 402 cloud solution

you can review: 
https://clouddocs.f5.com/training/community/f5cert/html/class17/class17.html F5 401 - Security Solution Expert Study Guide - Created 09/26/18¶

I recently recertified my F5 401 - CSE-Security and I believe the information on this Study guide is still relevant. 

I would add to read up on:

K02145419: Overview of the DataSafe profile

AS3 - https://clouddocs.f5.com/products/extensions/f5-appsvcs-extension/latest/userguide/about-as3.html