You are configuring your company's application to use Auto Scaling and need to move user state information. Which of the following AWS services provides a shared data store with durability and low latency?
I'm a little confused by this question. What exactly do they mean by "user state information"? Is that the same as session data? If so, then DynamoDB could be a good choice, but I'm not 100% sure.
Okay, let me think this through. We need a shared data store, so that rules out EC2 instance storage. S3 has durability, but I'm not sure about the latency. DynamoDB does sound like the best option here.
I think this is a pretty straightforward question. The key is that we need a shared data store with durability and low latency, which points to DynamoDB.
Hmm, I'm a bit unsure about this one. I know DynamoDB is a NoSQL database, but I'm not sure if it has the low latency we're looking for. Maybe EC2 instance storage could work?
Hmm, I'm a bit confused on this one. The question mentions AJAX and the user tabbing out of each field, so I'm wondering if the Request scope might also be a valid option since the data is being updated in real-time. I'll need to think this through a bit more carefully.
Hmm, EC2 instance storage is temporary and not shared, so that's a no-go. I'm torn between A and B, but I'll go with B since S3 is more for object storage.
I was leaning towards D, but then I remembered ElastiCache Memcached is more for caching and not really a durable data store. Good thing I double-checked the options!
Ernest
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