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 1

The correct answers are A. Amazon DynamoDB and B. Amazon ElastiCache.

Amazon DynamoDB is a fully managed NoSQL database service that provides fast and consistent performance. It is a good choice for storing data from a recommendation engine, social media app, or gaming platform.

Amazon ElastiCache is a managed in-memory data store that provides high performance and low latency. It is a good choice for caching data that is frequently accessed, such as product catalogs or user session data.

Amazon Redshift is a fully managed data warehouse service that provides fast and scalable performance. It is a good choice for storing large amounts of structured data, such as customer transactions or financial records.

Amazon Aurora is a fully managed MySQL-compatible database service that provides high performance and availability. It is a good choice for migrating existing MySQL workloads to AWS.

Amazon RDS for MySQL is a managed relational database service that provides a MySQL-compatible database engine. It is a good choice for storing traditional relational data, such as customer orders or product inventory.

Therefore, the two AWS services that are examples of NoSQL databases are Amazon DynamoDB and Amazon ElastiCache.

Explanation 2

Answer: A and B. Amazon DynamoDB and Amazon ElastiCache are examples of NoSQL databases.

Explanation: NoSQL databases are non-relational databases that can store and process unstructured or semi-structured data. They are typically designed for high performance, scalability, and availability. NoSQL databases can support various data models, such as key-value, document, columnar, or graph.

Amazon DynamoDB is a fully managed NoSQL database service that provides fast and consistent performance with seamless scalability. It supports key-value and document data models, and offers features such as automatic scaling, encryption at rest, point-in-time recovery, and global tables.

Amazon ElastiCache is a fully managed in-memory data store and cache service that supports two popular open-source NoSQL engines: Redis and Memcached. It provides sub-millisecond latency and high throughput for applications that require real-time access to data. It also supports features such as replication, clustering, backup and restore, encryption in transit and at rest, and enhanced monitoring.

Explanation 3

The AWS service that is an example of a NoSQL database is A. Amazon DynamoDB.

Amazon DynamoDB is an example of a NoSQL database because it is designed to handle large amounts of data across many servers and it doesn’t require a fixed schema. It supports key-value and document data models, which are typical characteristics of NoSQL databases. DynamoDB is highly scalable, provides consistent low-latency performance, and offers flexibility in data modeling, making it suitable for various applications that need to process large amounts of data.

Explanation 4

The correct answers are A. Amazon DynamoDB and B. Amazon ElastiCache.

Amazon DynamoDB is a fully managed NoSQL database service that provides fast and predictable performance with seamless scalability. It is designed to handle high-volume, low-latency data such as user preferences, session data, clickstream data, and product recommendations. DynamoDB eliminates the need to manage servers, provision capacity, patch software, or perform backups. It also offers features such as encryption at rest, point-in-time recovery, global tables, and on-demand capacity mode.

Amazon ElastiCache is a fully managed in-memory data store and cache service that supports two open source engines: Redis and Memcached. It provides sub-millisecond latency and high throughput for data-intensive applications such as caching, gaming, real-time analytics, and leaderboards. It also offers features such as encryption at rest and in transit, backup and restore, auto-scaling, and multi-AZ replication.

Amazon Redshift is a fully managed data warehouse service that allows you to run complex analytic queries against petabytes of structured data using standard SQL. It provides fast query performance by using columnar storage, massively parallel processing (MPP), and machine learning. It also offers features such as encryption at rest and in transit, backup and restore, concurrency scaling, and integration with AWS services. However, it is not a NoSQL database.

Amazon Aurora is a relational database service that is compatible with MySQL and PostgreSQL engines. It provides up to five times the performance of standard MySQL and up to three times the performance of standard PostgreSQL. It also offers features such as high availability, scalability, durability, security, and compatibility. However, it is not a NoSQL database.

Amazon RDS for MySQL is a relational database service that supports the MySQL open source database engine. It provides a managed environment for running MySQL databases in the cloud. It handles tasks such as installation, patching, backup, recovery, and monitoring. It also offers features such as encryption at rest and in transit, multi-AZ deployment, read replicas, and integration with AWS services. However, it is not a NoSQL database.

Explanation 5

The correct answers are: A. Amazon DynamoDB and B. Amazon ElastiCache.

Explanation:

NoSQL databases are designed to handle unstructured or semi-structured data and offer high scalability and flexibility. Among the given options, the following two are examples of NoSQL databases:

• Amazon DynamoDB (Option A): DynamoDB is a fully managed NoSQL database service that provides seamless scalability and high availability. It is optimized for key-value and document data structures and is suitable for various types of applications, including web, mobile, gaming, and more.
• Amazon ElastiCache (Option B): ElastiCache is a fully managed in-memory caching service that supports popular open-source in-memory engines such as Redis and Memcached. While it’s not a traditional NoSQL database, it falls within the NoSQL category due to its focus on caching unstructured data in memory.

The other options mentioned:

• Amazon Redshift (Option C): Amazon Redshift is a managed data warehousing service that is designed for online analytical processing (OLAP). It is not a NoSQL database; rather, it’s a relational database optimized for analytical queries.
• Amazon Aurora (Option D): Amazon Aurora is a high-performance relational database engine compatible with MySQL and PostgreSQL. It is not a NoSQL database; it’s a relational database service.
• Amazon RDS for MySQL (Option E): Amazon RDS (Relational Database Service) for MySQL is a managed relational database service. It is not a NoSQL database; it’s a service for managing MySQL databases.

In summary, both Amazon DynamoDB and Amazon ElastiCache are examples of NoSQL databases within the given options.

Explanation 6

The two AWS services that are examples of NoSQL databases are:

A. Amazon DynamoDB: DynamoDB is a fully managed NoSQL database service provided by AWS. It offers high scalability, low latency, and automatic scaling of throughput capacity. DynamoDB is designed to handle large amounts of data and provides fast and predictable performance.

B. Amazon ElastiCache: ElastiCache is an in-memory data store service provided by AWS. While it is primarily used for caching purposes, it supports two NoSQL engines: Redis and Memcached. ElastiCache allows you to store and retrieve data in a key-value format, making it suitable for applications that require fast access to frequently accessed data.

C. Amazon Redshift: Redshift is not a NoSQL database. It is a fully managed data warehousing service provided by AWS. It is optimized for online analytical processing (OLAP) and is based on a columnar storage architecture. Redshift is designed for running complex queries on large datasets and is commonly used for business intelligence and data analytics purposes.

D. Amazon Aurora: Aurora is a relational database engine provided by AWS. It is compatible with MySQL and PostgreSQL and offers high performance, scalability, and durability. Aurora is not a NoSQL database as it follows a traditional relational database model.

E. Amazon RDS for MySQL: RDS for MySQL is a managed relational database service provided by AWS. It is based on the MySQL database engine and supports the relational database model. It is not a NoSQL database.

To summarize, the two AWS services that are examples of NoSQL databases are Amazon DynamoDB and Amazon ElastiCache.

Explanation 7

The correct answers are A. Amazon DynamoDB and B. Amazon ElastiCache.

Amazon DynamoDB is a fully managed NoSQL database service that provides fast and consistent performance. It is a good choice for storing data that is frequently accessed and that does not have a rigid schema.

Amazon ElastiCache is a fully managed in-memory data store that provides high performance and low latency. It is a good choice for storing data that needs to be accessed quickly, such as session data or caching data.

Amazon Redshift is a fully managed data warehouse service that is designed for analytical workloads. It is not a NoSQL database.

Amazon Aurora is a fully managed MySQL-compatible database service that is designed to be more scalable and available than RDS. It is not a NoSQL database.

Amazon RDS for MySQL is a managed relational database service that provides a MySQL-compatible database engine. It is not a NoSQL database.

Therefore, the AWS services that are examples of NoSQL databases are Amazon DynamoDB and Amazon ElastiCache.

Explanation 8

The AWS services that are examples of NoSQL databases are Amazon DynamoDB and Amazon ElastiCache.

Amazon DynamoDB is a fully managed NoSQL database service that provides fast and predictable performance with seamless scalability. It is designed to handle large amounts of data and can automatically scale up or down based on the traffic to your application. DynamoDB also provides built-in security features, such as encryption at rest and in transit, to help protect your data.

Amazon ElastiCache is a fully managed in-memory data store and cache service that is compatible with Redis and Memcached. It is designed to improve the performance of web applications by allowing you to retrieve information from fast, managed, in-memory caches instead of relying entirely on slower disk-based databases.

Therefore, the AWS services that are examples of NoSQL databases are Amazon DynamoDB and Amazon ElastiCache.

Explanation 9

The correct answers are A. Amazon DynamoDB and B. Amazon ElastiCache.

Amazon DynamoDB and Amazon ElastiCache are examples of NoSQL databases, which are databases that store and retrieve data in a non-relational or non-tabular format, such as key-value pairs, documents, graphs, or columns. NoSQL databases are designed to handle large volumes of structured, semi-structured, or unstructured data, with high performance, scalability, and availability.

Amazon DynamoDB is a fully managed NoSQL database service that provides fast and consistent performance, scalability, and high availability for any scale of data. It supports flexible data modeling and querying, as well as features such as encryption, backup, restore, point-in-time recovery, streams, triggers, and global tables.

Amazon ElastiCache is a fully managed in-memory data store and cache service that supports two popular open-source NoSQL engines: Redis and Memcached. It provides sub-millisecond latency and high throughput for data-intensive applications, such as gaming, e-commerce, social media, and analytics.

The other options are not examples of NoSQL databases because they are relational databases or support relational database engines. Relational databases are databases that store and retrieve data in a tabular format, with rows and columns. Relational databases are designed to handle structured data, with strict schema definitions, integrity constraints, and complex queries.

Amazon Redshift is a fully managed data warehouse service that supports the SQL standard and integrates with various business intelligence tools. It provides fast and cost-effective analytics on petabytes of structured data.

Amazon Aurora is a fully managed relational database service that is compatible with MySQL and PostgreSQL engines. It provides high performance, availability, and durability for mission-critical applications.

Amazon RDS for MySQL is a fully managed relational database service that supports the MySQL open-source database engine. It provides easy setup, operation, and scaling for online transaction processing (OLTP) applications.

Explanation 10

NoSQL databases are purpose built for specific data models and have flexible schemas for building modern applications. NoSQL databases are widely recognized for their ease of development, functionality, and performance at scale.

Among the options you provided, A. Amazon DynamoDB and B. Amazon ElastiCache are examples of NoSQL databases.

Amazon DynamoDB is a fully managed, serverless, key-value NoSQL database designed to run high-performance applications at any scale. DynamoDB offers built-in security, continuous backups, automated multi-Region replication, in-memory caching, and data import and export tools.

Amazon ElastiCache is a fully managed in-memory data store that supports two popular open-source NoSQL engines: Redis and Memcached. ElastiCache offers sub-millisecond latency, high availability, scalability, and integration with other AWS services.

The other options are not examples of NoSQL databases. Amazon Redshift is a fully managed data warehouse that uses SQL to query and analyze data. Amazon Aurora is a relational database that is compatible with MySQL and PostgreSQL. Amazon RDS for MySQL is a managed service that makes it easy to set up, operate, and scale MySQL deployments in the cloud.

Explanation 11

Here’s the answer to your question:

The correct answers are:

A. Amazon DynamoDB
B. Amazon ElastiCache

Explanation:

Amazon DynamoDB is a fully managed NoSQL database service that provides fast and predictable performance with seamless scalability. It supports key-value and document data models, and is ideal for applications that require low latency and high throughput.

Amazon ElastiCache is a fully managed, in-memory data store service that provides fast access to data and supports popular open source database engines like Redis and Memcached. It is designed for applications that require high performance and low latency.

Neither of the other options, Amazon Redshift, Amazon Aurora, and Amazon RDS for MySQL, are examples of NoSQL databases.

Amazon Redshift is a fully managed data warehouse service that is designed for querying and analyzing data using SQL-like queries. It is a relational database that stores data in a columnar format, which makes it optimized for querying and analysis.

Amazon Aurora is a MySQL and PostgreSQL-compatible relational database service that is designed to be a drop-in replacement for traditional on-premises databases. It is not a NoSQL database.

Amazon RDS for MySQL is a managed relational database service that makes it easy to set up and run MySQL databases in the cloud. It is not a NoSQL database.

Explanation 12

Amazon DynamoDB and Amazon ElastiCache are examples of NoSQL databases.

NoSQL databases are a type of database that do not use the traditional relational database model. Instead, they use a variety of different data models, such as key-value stores, document stores, and graph databases. This makes them more flexible and scalable than relational databases, but they can also be more complex to manage.

Amazon DynamoDB is a fully managed NoSQL database service that offers high performance, scalability, and durability. It is ideal for applications that require real-time access to data, such as mobile applications, gaming applications, and IoT applications.

Amazon ElastiCache is a managed in-memory data store that provides fast access to data for applications that require high performance. It is ideal for applications that need to process large amounts of data quickly, such as real-time analytics applications and gaming applications.

Explanation 13

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.

Explanation 14

Here is the answer with detailed explanation:

The two correct options are:

A) Amazon DynamoDB

Amazon DynamoDB is a fully managed NoSQL database service provided by AWS. It delivers single-digit millisecond performance at any scale. DynamoDB is a key-value and document database that delivers single-digit millisecond performance at any scale. It is a fully-managed database with no need for shards or replicas.

B) Amazon ElastiCache

Amazon ElastiCache is a web service that makes it easy to set up, manage, and scale distributed in-memory cache environments in the cloud. It supports Redis and Memcached protocols. ElastiCache is often used as a NoSQL database for purposes like storing session state and caching application data.

The other options are incorrect:

C) Amazon Redshift is a fast, fully managed, petabyte-scale data warehouse service in the cloud. It is meant for analytics workloads and is not considered a NoSQL database.

D) Amazon Aurora is a relational database engine that is MySQL and PostgreSQL wire protocol compatible. It is not a NoSQL database.

E) Amazon RDS for MySQL is a relational database service and uses the MySQL database engine. Relational databases like MySQL are not considered NoSQL databases.

Therefore, the two correct answers that are examples of NoSQL databases provided by AWS are Amazon DynamoDB and Amazon ElastiCache.

Explanation 15

The correct answers are A. Amazon DynamoDB and B. Amazon ElastiCache.

Amazon DynamoDB is a fully managed NoSQL database service that provides fast and consistent performance. It is a good choice for storing data from a recommendation engine, gaming applications, and other applications that require high performance and scalability.

Amazon ElastiCache is a managed in-memory data store that provides fast access to data. It is a good choice for caching data that is frequently accessed, such as product catalogs and user session data.

Amazon Redshift is a fully managed data warehouse service that provides fast and scalable performance for analytical workloads. It is a good choice for storing large amounts of data that needs to be analyzed, such as customer transactions and website clickstream data.

Amazon Aurora is a managed MySQL-compatible database service that provides high performance and availability. It is a good choice for applications that require a relational database but need the performance and scalability of a NoSQL database.

Amazon RDS for MySQL is a managed MySQL database service that provides a MySQL-compatible database engine. It is a good choice for applications that require a relational database but do not need the performance and scalability of a NoSQL database.

Therefore, the two AWS services that are examples of NoSQL databases are Amazon DynamoDB and Amazon ElastiCache.

Explanation 16

The two AWS services that are examples of NoSQL databases are:

A. Amazon DynamoDB: Amazon DynamoDB is a fully managed NoSQL database service provided by AWS. It is designed for applications that require low-latency, single-digit millisecond response times and can scale to handle large workloads. DynamoDB offers high availability and durability, automatic scaling, and seamless integration with other AWS services.

B. Amazon ElastiCache: Amazon ElastiCache is a web service that provides an in-memory data store or cache. While ElastiCache supports both Redis and Memcached, both of which are NoSQL databases, Redis is more commonly used for caching purposes. Redis is an open-source, in-memory data structure store that can be used as a database, cache, or message broker. It offers high performance, scalability, and persistence options.

C. Amazon Redshift: Amazon Redshift is not an example of a NoSQL database. It is a fully managed data warehousing service that is optimized for online analytic processing (OLAP). Redshift uses columnar storage and parallel query execution to handle large-scale data warehousing workloads efficiently.

D. Amazon Aurora: Amazon Aurora is a relational database service that is compatible with MySQL and PostgreSQL. It provides the performance and availability of commercial-grade databases at a lower cost. Aurora is not a NoSQL database; it is a highly scalable, distributed, and durable relational database service.

E. Amazon RDS for MySQL: Amazon RDS (Relational Database Service) for MySQL is a managed database service that simplifies the setup, operation, and scaling of a MySQL database in the cloud. MySQL is a widely used open-source relational database management system (RDBMS) and is not classified as a NoSQL database.

In summary, the correct options are A. Amazon DynamoDB and B. Amazon ElastiCache as examples of NoSQL databases among the given options.

Explanation 17

The AWS services that are examples of NoSQL databases are Amazon DynamoDB (Option A) and Amazon ElastiCache (Option B).

Explanation:

Let’s evaluate each option to determine which services are examples of NoSQL databases:

A. Amazon DynamoDB: Amazon DynamoDB is a fully managed NoSQL database service provided by AWS. It is designed for applications that require low-latency, scalable, and highly available data storage. DynamoDB offers fast and predictable performance and supports key-value and document data models.

B. Amazon ElastiCache: Amazon ElastiCache is a fully managed, in-memory caching service that supports two popular open-source in-memory data stores: Memcached and Redis. While ElastiCache is primarily used for caching, Redis is a NoSQL database that can be utilized as a key-value store or as a data structure store.

C. Amazon Redshift: Amazon Redshift is a fully managed data warehousing service that is optimized for online analytic processing (OLAP). It is not a NoSQL database but rather a columnar data store that is well-suited for running complex analytical queries on large datasets.

D. Amazon Aurora: Amazon Aurora is a relational database service that is compatible with MySQL and PostgreSQL. It is not a NoSQL database, but rather a highly available and scalable relational database engine.

E. Amazon RDS for MySQL: Amazon RDS (Relational Database Service) for MySQL is a managed service that provides a resizable database in the cloud. MySQL is a popular open-source relational database management system (RDBMS) and not a NoSQL database.

In summary, the two AWS services that are examples of NoSQL databases are Amazon DynamoDB (Option A) and Amazon ElastiCache (Option B). DynamoDB is a fully managed NoSQL database service, while ElastiCache supports Redis, which can be used as a NoSQL data store.

Explanation 18

Based on my knowledge and expertise in Amazon AWS Certified Cloud Practitioner certification exam, I can tell you that the correct answer is (B) Amazon ElastiCache and (D) Amazon Aurora.

Amazon ElastiCache is an in-memory data storage service that can be used as a NoSQL database. It stores data in an in-memory cache, which can improve the performance of web applications and other workloads that require fast data access. ElastiCache supports a variety of database engines, including Memcached, Redis, and Oracle.

Amazon Aurora is a MySQL and PostgreSQL-compatible database service that offers a variety of storage options, including a NoSQL database option. Aurora is designed to provide high availability, durability, and performance for databases, and it can be easily scaled to meet the needs of applications.

The other options are not NoSQL databases:

• (A) Amazon DynamoDB is a fully managed NoSQL database service that provides fast and predictable performance with seamless scalability. While it is not an example of a NoSQL database, it is often used for mobile, web, and IoT applications that require fast data access.
• (C) Amazon Redshift is a data warehousing and analytics database service that is designed for analyzing large amounts of data. It is not a NoSQL database, but rather a distributed relational database that can handle petabyte-scale data and perform complex queries.
• (E) Amazon RDS for MySQL is a managed relational database service that provides a managed environment for MySQL and Oracle databases. While it is not a NoSQL database, it can be used for a wide range of applications that require a highly available and scalable database environment.

Explanation 19

The correct answers are A and D.

A. Amazon DynamoDB: DynamoDB is a fully managed NoSQL database service provided by AWS. It is a key-value and document database that provides low-latency access to data and supports a highly scalable architecture.

D. Amazon Aurora: Aurora is a MySQL and PostgreSQL-compatible database service that is also a NoSQL database. It is designed to provide high availability, durability, and performance for web-scale applications.

Explanation:

B. Amazon ElastiCache: ElastiCache is an in-memory data store and cache service, not a database.

C. Amazon Redshift: Redshift is a fully managed data warehouse service, not a NoSQL database.

E. Amazon RDS for MySQL: RDS (Relational Database Service) is a managed relational database service, not a NoSQL database. While RDS supports MySQL, it is not a NoSQL database.

Reference

• What is NoSQL? | Nonrelational Databases, Flexible Schema Data Models | AWS (amazon.com)
• Fast NoSQL Key-Value Database – Amazon DynamoDB – Amazon Web Services
• NoSQL Workbench for Amazon DynamoDB – A professional GUI client

Amazon AWS Certified Cloud Practitioner certification exam practice question and answer (Q&A) dump with detail explanation and reference available free, helpful to pass the Amazon AWS Certified Cloud Practitioner exam and earn Amazon AWS Certified Cloud Practitioner certification.

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