Amazon DynamoDB supports fast in-place updates. You can increment or decrement a numeric attribute in a row using a single API call. Similarly, you can atomically add or remove to sets, lists, or maps. View our documentation for more information on atomic updates.
C, Yes
https://aws.amazon.com/dynamodb/faqs/
Q: Does DynamoDB support in-place atomic updates?
Amazon DynamoDB supports fast in-place updates. You can increment or decrement a numeric attribute in a row using a single API call. Similarly, you can atomically add or remove to sets, lists, or maps. View our documentation for more information on atomic updates.
0
0