Question 110:
KindleYou is a location-based social search mobile app that allows users to like or dislike other users, and allows users to chat if both parties liked each other in the app. It has more than 1 billion customers across the world. They use DynamoDB to support the mobile application and S3 to host the images and other documents shared between users. Consider a table named SessionData that tracks the session history of users. Each item in SessionData is identified by a partition key (UserName) and a sort key (SessionId). Additional attributes like UserName, SessionId, CreationTime and ExpirationTime track the session information.The ExpirationTime attribute is set as the Time To Live (TTL) attribute. How is the data in the SessionData table managed in DynamoDB post TimeToLive (TTL)? Select 2 options.
Answer options:
A.A background job checks the TTL attribute of items to see if they are expired. B.No background job is needed to check TTL. Automatically DynamoDB expires the Item. C.If the epoch time value stored in the attribute is less than the current time, the item is marked as expired and subsequently deleted. D.The item is marked as expired and subsequently deleted automatically. E.There is a very mild performance impact when deletion is performed, it specially impacts the read traffic. F.There is a very mild performance impact when deletion is performed, it specially impacts the write traffic.