Answer - B.
DynamoDB is a fully managed NoSQL offering provided by AWS.
It is now available in most regions for users to consume.
For more information on AWS DynamoDB, visit the below link:
https://aws.amazon.com/dynamodb/
The correct answer is B. DynamoDB.
Explanation:
AWS RDS (A) is a managed relational database service, which provides options for MySQL, Oracle, SQL Server, PostgreSQL, MariaDB, and Amazon Aurora database engines.
DynamoDB (B) is a fully managed NoSQL database service provided by AWS, which supports key-value and document data models. It is designed to provide low-latency, highly scalable, and fault-tolerant performance for any application that needs consistent, single-digit millisecond latency at any scale. DynamoDB is a good fit for web, mobile, gaming, ad tech, IoT, and many other applications.
Oracle RDS (C) is also a managed relational database service provided by AWS, which provides options for the Oracle database engine.
Elastic MapReduce (D) is a fully managed big data processing service that makes it easy to process large amounts of data using Hadoop, Spark, Presto, Hive, and other popular open-source frameworks. It is not a NoSQL database service.
Therefore, the correct answer to the question is B. DynamoDB, which is a fully managed NoSQL database provided by AWS.
