Fault Handler for Multiple Operations

Summary:

I have the below flow in which 

1) First using DB Adapter, selecting rows from database tables using select queries based on where condition

2) Pass the values from database to the REST API 

3) Response from REST API is passed to the Stored Procedure using DB Adapter

I would like to know is should I have one Fault Handler or multiple Fault Handler? What is the best practice?

Content (please ensure you mask any confidential information):

Version (include the version you are using, if applicable):

Gen2

Code Snippet (add any code snippets that support your topic, if applicable):