How many Always On availability Groups can be configured in always on?

How many replicas can I have in an AlwaysOn availability group?

Each availability group supports one primary replica and up to eight secondary replicas. For more information, see Overview of Always On Availability Groups (SQL Server). Each availability replica must reside on a different node of a single Windows Server Failover Clustering (WSFC) cluster.

How many availability groups does an instance have?

Availability Groups now allow you to group appropriate databases together. You can setup, up to 10 AAG's on a per instance level. Across these 10 Availability Groups you can have up to 100 replica databases participating.

How many replicas can I have in an AlwaysOn availability Group 2016?

Limit of two replicas (primary and secondary).

Which three operating modes are possible with AlwaysOn availability groups?

Always On availability groups supports three availability modes-asynchronous-commit mode, synchronous-commit mode, and configuration only mode as follows: Asynchronous-commit mode is a disaster-recovery solution that works well when the availability replicas are distributed over considerable distances.