Final answer:
The four view types for DynamoDB Streams are KEYS_ONLY, NEW_IMAGE, OLD_IMAGE, and NEW_AND_OLD_IMAGES, which specify the amount of data sent to consumers of the stream.
Step-by-step explanation:
The four view types available with DynamoDB (DDB) Streams are:
- KEYS_ONLY - only the key attributes of the modified item.
- NEW_IMAGE - the entire item as it appears after it was modified.
- OLD_IMAGE - the entire item as it appeared before it was modified.
- NEW_AND_OLD_IMAGES - both the new and the old images of the item.
These view types determine the data that will be sent to any applications or services consuming the DDB Stream, which is useful for various application requirements such as replication, triggering workflows, or auditing changes.