来源：AWS解决方案架构师认证-助理级(SAA-C03)仿真练习题
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🌟 单词：
- accidentaladj. 意外的，偶然的；不测的；非本质的；附带的 | n. 偶然，临时符，变音记号
- deletionn. 删除，（遗传学上染色体的）缺失，删除部分
- migratev. 移动，迁移；（鸟类、动物等）随季节而迁徙；移民；转移
- infrastructuren. （国家或机构的）基础设施
一、Amazon S3 versioning
A company hosts a static website within an Amazon S3 bucket. A solutions architect needs to ensure that data can be recovered in case of accidental deletion.
Which action will accomplish this?
- ✅ Enable Amazon S3 versioning.
- Enable Amazon S3 Intelligent-Tiering.
- Enable an Amazon S3 lifecycle policy.
- Enable Amazon S3 cross-Region replication.
✨ 关键词：S3 版本控制、意外删除后的恢复
1️⃣ ✅
💡 解析：Data can be recover if versioning enable, also it provide a extra protection like file delete,MFA delete. MFA. Delete only works for CLI or API interaction, not in the AWS Management Console. Also, you cannot make version DELETE actions with MFA using IAM user credentials. You must use your root AWS account.
二、Amazon RDS Read Replicas
A company is migrating a three-tier application to AWS. The application requires a MySQL database. In the past, the application users reported poor application performance when creating new entries. These performance issues were caused by users generating different real-time reports from the application during working hours.
Which solution will improve the performance of the application when it is moved to AWS?
1. Import the data into an Amazon DynamoDB table with provisioned capacity. Refactor the application to use DynamoDB for reports.
2. Create the database on a compute optimized Amazon EC2 instance. Ensure compute resources exceed the on-premises database.
3. ✅ Create an Amazon Aurora MySQL Multi-AZ DB cluster with multiple read replicas. Configure the application reader endpoint for reports.
4. Create an Amazon Aurora MySQL Multi-AZ DB cluster. Configure the application to use the backup instance of the cluster as an endpoint for the reports.
✨ 关键词：Amazon RDS 读写分离、Amazon RDS Read Replicas
3️⃣ ✅
💡 解析：无。
三、Amazon S3 to save static webpage content and use CloudFront
A company hosts a static website on-premises and wants to migrate迁移 the website to AWS. The website should load as quickly as possible for users around the world. The company also wants the most cost-effective solution.
What should a solutions architect do to accomplish this?
- Copy the website content to an Amazon S3 bucket. Configure the bucket to serve static webpage content. Replicate the S3 bucket to multiple AWS Regions.
- ✅ Copy the website content to an Amazon S3 bucket. Configure the bucket to serve static webpage content. Configure Amazon CloudFront with the S3 bucket as the origin.
- Copy the website content to an Amazon EBS-backed Amazon EC2 instance running Apache HTTP Server. Configure Amazon Route 53 geolocation routing policies to select the closest origin.
- Copy the website content to multiple Amazon EBS-backed Amazon EC2 instances running Apache HTTP Server in multiple AWS Regions. Configure Amazon CloudFront geolocation routing policies to select the closest origin.
✨ 关键词：Amazon S3、Static webpage content、CloudFront
2️⃣ ✅
💡 解析：What Is Amazon CloudFront?
Amazon CloudFront is a web service that speeds up distribution of your static and dynamic web content, such as .html, .css, .js, and image files, to your users.
CloudFront delivers your content through a worldwide network of data centers called edge locations. When a user requests content that you’re serving with CloudFront, the user is routed to the edge location that provides the lowest latency (time delay), so that content is delivered with the best possible performance.Using Amazon S3 Buckets for Your Origin.
When you use Amazon S3 as an origin for your distribution, you place any objects that you want CloudFront to deliver in an Amazon S3 bucket. You can use any method that is supported by Amazon S3 to get your objects into Amazon S3, for example, the Amazon S3 console or API, or a third-party tool. You can create a hierarchy in your bucket to store the objects, just as you would with any other Amazon S3 bucket.
Using an existing Amazon S3 bucket as your CloudFront origin server doesn’t change the bucket in any way; you can still use it as you normally would to store and access Amazon S3 objects at the standard Amazon S3 price. You incur regular Amazon S3 charges for storing the objects in the bucket.
Reference:
https://docs.aws.amazon.com/AmazonCloudFront/latest/DeveloperGuide/Introduction.html
https://docs.aws.amazon.com/AmazonCloudFront/latest/DeveloperGuide/DownloadDistS3AndCustomOrigins.html
四、Amazon Elastic File System
A product team is creating a new application that will store a large amount of data. The data will be analyzed hourly and modified by multiple Amazon EC2 Linux instances. The application team believes the amount of space needed will continue to grow for the next 6 months.
Which set of actions should a solutions architect take to support these needs?
1. Store the data in an Amazon EBS volume. Mount the EBS volume on the application instances.
2. ✅ Store the data in an Amazon EFS file system. Mount the file system on the application instances.
3. Store the data in Amazon S3 Glacier. Update the vault policy to allow access to the application instances.
4. Store the data in Amazon S3 Standard-Infrequent Access (S3 Standard-IA). Update the bucket policy to allow access to the application instances.
✨ 关键词：Amazon EFS、modified by multiple Amazon EC2
2️⃣ ✅
💡 解析：Amazon Elastic File System (Amazon EFS) provides a simple, scalable, fully managed elastic NFS file system for use with AWS Cloud services and on-premises resources. It is built to scale on demand to petabytes without disrupting applications, growing and shrinking automatically as you add and remove files, eliminating the need to provision and manage capacity to accommodate growth.
Amazon EFS is designed to provide massively parallel shared access to thousands of Amazon EC2 instances, enabling your applications to achieve high levels of aggregate throughput and IOPS with consistent low latencies.
Amazon EFS is well suited to support a broad spectrum of use cases from home directories to business-critical applications. Customers can use EFS to lift-and- shift existing enterprise applications to the AWS Cloud. Other use cases include: big data analytics, web serving and content management, application development and testing, media and entertainment workflows, database backups, and container storage.
Amazon EFS is a regional service storing data within and across multiple Availability Zones (AZs) for high availability and durability. Amazon EC2 instances can access your file system across AZs, regions, and VPCs, while on-premises servers can access using AWS Direct Connect or AWS VPN.
Reference:
https://aws.amazon.com/efs/
五、Amazon FSx
A company is migrating from an on-premises infrastructure to the AWS Cloud. One of the company’s applications stores files on a Windows file server farm that uses Distributed File System Replication (DFSR) to keep data in sync. A solutions architect needs to replace the file server farm.
Which service should the solutions architect use?
1. Amazon EFS
2. ✅ Amazon FSx
3. Amazon S3
4. AWS Storage Gateway
✨ 关键词：Windows file server farm
2️⃣ ✅
💡 解析：Amazon FSx 让您可以轻松且经济高效地在云中启动、运行和扩展功能丰富的高性能文件系统。该服务具备可靠性、安全性、可扩展性和丰富的功能，可以为大量工作负载提供支持。Amazon FSx 建立在最新的 AWS 计算、网络和磁盘技术之上，可提供高性能和更低的 TCO。作为一项完全托管的服务，它可以处理硬件配置、补丁和备份，使您能够腾出时间专注于应用程序、最终用户和业务。
Amazon FSx 允许你在四个广泛使用的文件系统之间进行选择：NetApp ONTAP、OpenZFS、Windows File Server 和 Lustre。这种选择通常取决于您对给定文件系统的熟悉程度，或者将文件系统的功能集、性能概况和数据管理能力与您的工作负载要求相匹配。
Reference:
https://aws.amazon.com/cn/fsx/