You have been hired as a Database administrator by a start-up. Your first task is to modify a DynamoDB table so that its data expires automatically after a certain period of time. Upon looking at the documentation, you figured out that DynamoDB supports a concept of TTL using which you can achieve the same. What are the steps to use the feature?

Answer options:

A.Enable TTL and use the dataExpiry keyword as a key attribute to store the expiry timestamp.
B.Enable TTL and use any name of your choice as a key attribute to store the expiry timestamp.
C.Enable TTL and use the keyword expiryTTL as a key attribute to store the expiry timestamp.
D.It is by default enabled and will automatically pick a key attribute with timestamp value.

Correct Answer: B
While enabling TTL, you can provide any name of your choice to use as a key attribute name to be used for storing timestamp value.
Option A is incorrect: dataExpiry is not a reserved keyword for TTL.
Option C is incorrect: expiryTTL is also not a reserved keyword for TTL.
Option D is incorrect: TTL is not enabled by default, and it does not even pick the TTL key attribute automatically.
Reference:
https://docs.aws.amazon.com/amazondynamodb/latest/developerguide/TTL.html