Table of Contents
Question
Which AWS services are examples of NoSQL databases? (Choose two.)
A. Amazon DynamoDB
B. Amazon ElastiCache
C. Amazon Redshift
D. Amazon Aurora
E. Amazon RDS for MySQL
Answer
A. Amazon DynamoDB
B. Amazon ElastiCache
Explanation
The correct answers for the question “Which AWS services are examples of NoSQL databases?” are:
A. Amazon DynamoDB
B. Amazon ElastiCache
Explanation:
A NoSQL database refers to a non-relational database that provides a flexible schema design and is suitable for handling vast amounts of unstructured or semi-structured data. Among the given options, Amazon DynamoDB and Amazon ElastiCache are examples of NoSQL databases.
A. Amazon DynamoDB: This is a fully managed NoSQL database service provided by AWS. DynamoDB is designed to provide low-latency, high-performance storage for applications that require consistent, single-digit millisecond response times. It is a key-value store that allows you to store and retrieve any amount of data and automatically scales to handle traffic fluctuations.
B. Amazon ElastiCache: While ElastiCache is primarily a managed in-memory cache service, it supports two NoSQL databases: Redis and Memcached. Both Redis and Memcached are key-value stores that are commonly used for caching and speeding up read-heavy workloads. ElastiCache allows you to utilize these NoSQL databases as an in-memory cache for your applications, improving performance and reducing the load on your primary databases.
The other options, C. Amazon Redshift, D. Amazon Aurora, and E. Amazon RDS for MySQL, are not examples of NoSQL databases.
C. Amazon Redshift: Redshift is a fully managed data warehousing service that is optimized for online analytic processing (OLAP) workloads. It is based on a columnar storage architecture and is primarily used for querying and analyzing large datasets using SQL.
D. Amazon Aurora: Aurora is a relational database engine compatible with MySQL and PostgreSQL. It is designed to provide high performance, scalability, and durability. Aurora is a relational database and does not fall under the NoSQL category.
E. Amazon RDS for MySQL: RDS (Relational Database Service) for MySQL is a managed service that simplifies the deployment, operation, and scaling of MySQL databases in the AWS cloud. MySQL is a popular open-source relational database management system (RDBMS) and does not fit the NoSQL database model.
Therefore, the correct answers are A. Amazon DynamoDB and B. Amazon ElastiCache.
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