What trace flags are already enabled in SQL Server 2016

Hello,

I read somewhere Trace flags 1118, 1117 & 2371 are already enabled in SQL Server 2016 but when I execute DBCC TRACESTATUS(-1), no data is returned indicating no trace flags are enabled.

Env:

Microsoft SQL Server 2016 (RTM-GDR) (KB3194716) - 13.0.1722.0 (X64)   Sep 26 2016 13:17:23   Copyright (c) Microsoft Corporation  Enterprise Evaluation Edition (64-bit) on Windows 8.1 Enterprise 6.3 <X64> (Build 9600: ) 

I would appreciate if someone shed light on two points:

1. If certain trace flags are enabled, whether enabled by default during product shipping or enabled by DBA - DBCC TRACESTATUS is the correct way to get this information?
2. Even if a trace flag is enabled by Microsoft in a version of SQL Server, it would possible to disable the same if required?

Appreciate your pointed revert. Thank you.