Assessment Service Requires Schema For Question & QuestionSet asset Type. For Reference, Schema for both asset type is given here.
Any Asset schema contains two files:
1. schema.json - This file contains all properties field and its data type
2. config.json - This file contains all configuration specific to asset type. e.g: external table name, external field names and their data types, etc
Schema for Question & QuestionSet can be also found here.\