Module 5: Storage and Databases

You want to store data that is infrequently accessed but must be immediately available when needed. Which Amazon S3 storage class should you use?

• Amason S3 Intelligent-Tiering

• Amason S3 Glacier Deep Archive

• Amazon S3 Standard-IA

• Amazon S3 Glacier Flexible Retrieval

Answer explanation

The correct response option is Amazon S3 Standard-IA.

 

The Amazon S3 Standard-IA storage class is ideal for data that is infrequently accessed but requires high availability when needed. Both Amazon S3 Standard and Amazon S3 Standard-IA store data in a minimum of three Availability Zones. Amazon S3 Standard-IA provides the same level of availability as Amazon S3 Standard but at a lower storage price.

 

The other response options are incorrect because:

In the Amazon S3 Intelligent-Tiering storage class, Amazon S3 monitors objects’ access patterns. If you haven’t accessed an object for 30 consecutive days, Amazon S3 automatically moves it to the infrequent access tier, Amazon S3 Standard-IA. If you access an object in the infrequent access tier, Amazon S3 automatically moves it to the frequent access tier, Amazon S3 Standard.

Amazon S3 Glacier Flexible Retrieval and Amazon S3 Glacier Deep Archive are low-cost storage classes that are ideal for data archiving. They would not be the best choice for this scenario, which requires high availability. You can retrieve objects stored in the Amazon S3 Glacier Flexible Retrieval storage class within a few minutes to a few hours. By comparison, you can retrieve objects stored in the Amazon S3 Glacier Deep Archive storage class within 12 hours.

What are the scenarios in which you should use Amazon Relational Database Service (Amazon RDS)? (Select TWO.)

• Running a serverless database

• Using SQL to organize data

• Storing data in a key-value database

• Scaling up to 10 trillion requests per day

• Storing data in an Amazon Aurora database

Answer explanation

The two correct response options are:

Using SQL to organize data

Storing data in an Amazon Aurora database

The other three response options are scenarios in which you should use Amazon DynamoDB.

Which statement or statements are TRUE about Amazon EBS volumes and Amazon EFS file systems?

• EBS volumes store data within a single Availability Zone. Amazon EFS file systems store data across multiple Availability Zones.

• EBS volumes store data across multiple Availability Zones. Amazon EFS file systems store data within a single Availability Zone.

• EBS volumes and Amazon EFS file systems both store data within a single Availability Zone.

• EBS volumes and Amazon EFS file systems both store data across multiple Availability Zones.

Answer explanation

The correct response option is: EBS volumes store data within a single Availability Zone. Amazon EFS file systems store data across multiple Availability Zones.

 

An EBS volume must be located in the same Availability Zone as the Amazon EC2 instance to which it is attached.

 

Data in an Amazon EFS file system can be accessed concurrently from all the Availability Zones in the Region where the file system is located.

You want to store data in an object storage service. Which AWS service is best for this type of storage?

• Amazon Managed Blockchain

• Amazon Elastic File System (EFS)

• Amazon Elastic Block Store (EBS)

• Amazon Simple Storage Service (S3)

Answer explanation

The correct response option is Amazon Simple Storage Service (Amazon S3).

 

The other response options are incorrect because:

Amazon Managed Blockchain is a service that you can use to create and manage blockchain networks with open-source frameworks. Blockchain is a distributed ledger system that lets multiple parties run transactions and share data without a central authority.

Amazon Elastic File System (Amazon EFS) is a scalable file system used with AWS Cloud services and on-premises resources. It does not store data as object storage.

Amazon Elastic Block Store (Amazon EBS) is a service that provides block-level storage volumes that you can use with Amazon EC2 instances.

Which statement best describes Amazon DynamoDB?A service that enables you to run relational databases in the AWS Cloud

• A service that enables you to run relational databases in the AWS Cloud

• A serverless key-value database service

• A service that you can use to migrate relational databases, nonrelational databases, and other types of data stores

• An enterprise-class relational database

Answer explanation

The correct response option is A serverless key-value database service.

 

Amazon DynamoDB is a key-value database service. It is serverless, which means that you do not have to provision, patch, or manage servers.

 

The other response options are incorrect because:

A service that enables you to run relational databases in the AWS Cloud describes Amazon Relational Database Service (Amazon RDS).

A service that you can use to migrate relational databases, nonrelational databases, and other types of data stores describes AWS Database Migration Service (AWS DMS).

An enterprise-class relational database describes Amazon Aurora.

Which service is used to query and analyze data across a data warehouse?

• Amazon Redshift

• Amazon Neptune

• Amazon DocumentDB

• Amazon ElastiCache