The Support center, response for the questions asked are not getting properly answered, you ask them or point out a mistake, they reply with some reference.
For eg, last week I had pointed out one issue with the question 19 in exam no 1 for AWS developer exam, the question was which method of deployment starts new instance
from the docs, it is
But the whizlab says that only ‘immutable and ble-green’ start new instance and not rolling deployment, while the AWS docs for rolling department says that
During a rolling update, capacity is only reduced by the size of a single batch, which you can configure. Elastic Beanstalk takes one batch of instances out of service, terminates them, and "then launches a batch with the new configuration". After the new batch starts serving requests, Elastic Beanstalk moves on to the next batch.