Which of the below mentioned functionalities helps achieve HA?

A user wants to achieve High Availability with PostgreSQL DB.

Which of the below mentioned functionalities helps achieve HA?
A .  Multi AZ
B .  Read Replica
C .  Multi region
D .  PostgreSQL does not support HA

View Answer

Answer: A

Explanation:

The Multi AZ feature allows the user to achieve High Availability. For Multi AZ, Amazon RDS automatically provisions and maintains a synchronous “standby” replica in a different Availability Zone.

Reference: http://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/Welcome.html