Identify the main concepts and terminologies in DynamoDB

1. DynamoDB stores data in which is a collection of data.
2. Each table contains zero or more . An item is a group of attributes that is uniquely identifiable among all other items. 
3. An item is composed of one or more .  An attribute is a fundamental data element, something that does not need to be broken down any further.
4. When you create a table, in addition to the table name, you must specify the of the table. 
5. You can create one or more indexes on a table. 
6. DynamoDB is an optional feature that captures data modification events in DynamoDB tables. The events are near real time and occurs when an item is created, updated, or deleted.
7. One capacity unit (RCU) represents one strongly consistent read per second, or two eventually consistent reads per second, for an item up to 4 KB in size.
8. One capacity unit (WCU) represents one write per second for an item up to 1 KB in size.
9. is the action of limiting the number of requests that a client can submit to a given operation in a given amount of time. 
10. DynamoDB has two capacity modes for processing read/write transactions on your tables (On demand and Provisioned).

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