What happens to the I/O operations while you take a database snapshot?
A.
I/O operations to the database are suspended for a few minutes while the backup is in progress.
B.
I/O operations to the database are sent to a Replica (if available) for a few minutes while the backup is in
progress.
C.
I/O operations will be functioning normally
D.
I/O operations to the database are suspended for an hour while the backup is in progress
Agree with A.
“Amazon RDS creates a storage volume snapshot of your DB instance, backing up the entire DB instance and not just individual databases. Creating this DB snapshot on a Single-AZ DB instance results in a brief I/O suspension that can last from a few seconds to a few minutes, depending on the size and class of your DB instance. Multi-AZ DB instances are not affected by this I/O suspension since the backup is taken on the standby.”
http://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/USER_CreateSnapshot.html
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However, note that in multi AZ C would be the answer
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