You will be tested on 5 sections. Installation, Configuration, Troubleshooting, Hive Availability, Security
Installation contains of Configure a local HDP repository, Installing Ambari agent and server, Decommissioning a node, adding a node, Add an HDP service to a cluster using Ambari etc.
Configuration contains changing the config of a service, Define and deploy a rack topology script, changing the log location for a service etc.
Troubleshooting contains debugging a failed service, reading log files of a service, managing alerts, troubleshooting a job etc.
Hive Availability contains setting up HA for namenode, Resource Manager, Hive server and also creating snapshots and managing snapshots, distcp between clusters etc.
Security contains setting up Knox, Ranger, Kerberos. Managing ACLs etc.
You can find the complete syllabus here and link for practice exam here.
Hope this helps. All the best for your exam 🙂