HOTSPOT
An organization has over 10,000 users and uses a SQL-based Active Directory Federation Services (AD
FS) server farm.
You need to change the AD FS 2.0 service account password.
What should you do? Select the correct answer from each list in the answer area.
Answer: 
Correct, see https://technet.microsoft.com/en-us/library/hh344804(v=ws.10).aspx
Server 2012 R2 uses ADFS 3.0 which no longer relies on IIS so you only need to update the password for the service on each federation server.
https://blogs.technet.microsoft.com/rmilne/2016/12/06/change-ad-fs-2012-r2-service-account-password/
The question specifically stated the use of ADFS 2.0, which requires IIS. ADFS 2.0 is still in use and has not yet been deprecated.