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AWS-Solutions-Associate試験の資格を得るには、AWSでスケーラブル、非常に利用可能な、およびフォールトトレラントシステムを設計および展開する最低1年間の実践的なエクスペリエンスが必要です。また、Core AWSサービス、AWSアーキテクチャのベストプラクティス、およびAWSコスト最適化戦略をよく理解する必要があります。
この認定試験は、AWS上でスケーラブルでコスト効果の高い、耐障害性のシステムを設計・展開する経験が1年以上ある個人を対象に設計されています。AWSアーキテクチャ、展開、セキュリティ、トラブルシューティングなど、さまざまなトピックをカバーしています。この試験は、実世界のシナリオにAWSのベストプラクティスと設計原則を適用する候補者の知識と能力をテストするよう設計されています。
>> AWS-Solutions-Associate受験対策 <<
AWS-Solutions-Associate試験問題のさまざまなバージョンを知りたい場合があります。まず、PDFバージョンは読みやすく、印刷しやすいです。次に、ソフトウェアバージョンは実際のAWS-Solutions-Associate実際のテストガイドをシミュレートしますが、Windowsオペレーティングシステムでのみ実行できます。第三に、オンライン版はあらゆる電子機器をサポートし、オフライン使用もサポートします。初めて、オンライン環境でAWS-Solutions-Associate試験問題を開く必要があり、それをオフラインで使用できます。全体として、受験者が試験に合格するのを支援することが常に求められています。 AWS-Solutions-Associate実際のテストガイドが最適です。
Amazon AWS-Solutions-Associate（AWS Certified Solutions Architect-Associate（SAA-C02））認定試験は、スケーラブルで高度に利用可能なスケーラブルで展開のスキルと知識を検証したいIT専門家にとって非常に人気のある認定です。 Amazon Web Services（AWS）のフォールトトレラントシステム。この認定試験は、AWS上のクラウドベースのソリューションの設計と展開において、1年以上の実践的な経験を持つ個人向けに設計されています。 AWS-Solutions-Associate認証試験は、AWS Architectsの次のレベルの認定であるAWS認定ソリューションアーキテクトプロフェッショナルになるための最初のステップです。
質問 # 193
A news company that has reporters ail over the world is hosting its broadcast system on AWS The reporters send live broadcasts to the broadcast system The reporters use software on their phones to send live streams through the Real Time Messaging Protocol (RTMP).
A solutions architect must design a solution that gives the reporters the ability to send the highest quality streams. The solution must provide accelerated TCP connections back to the broadcast system.
What should the solutions a use to meet these requirements?
正解：B
質問 # 194
Your application is using an ELB in front of an Auto Scaling group of web/application servers deployed across two AZs and a Multi-AZ RDS Instance for data persistence.
The database CPU is often above 80% usage and 90% of 1/0 operations on the database are reads. To improve performance you recently added a single-node Memcached ElastiCache Cluster to cache frequent DB query results. In the next weeks the overall workload is expected to grow by 30%.
Do you need to change anything in the architecture to maintain the high availability or the application with the anticipated additional load? Why?
正解：D
解説：
ElastiCache for Memcached
The primary goal of caching is typically to offload reads from your database or other primary data source.
In most apps, you have hot spots of data that are regularly queried, but only updated periodically. Think of the front page of a blog or news site, or the top 100 leaderboard in an online game. In this type of case, your app can receive dozens, hundreds, or even thousands of requests for the same data before it's updated again. Having your caching layer handle these queries has several advantages. First, it's considerably cheaper to add an in-memory cache than to scale up to a larger database cluster. Second, an in-memory cache is also easier to scale out, because it's easier to distribute an in-memory cache horizontally than a relational database.
Last, a caching layer provides a request buffer in the event of a sudden spike in usage. If your app or game ends up on the front page of Reddit or the App Store, it's not unheard of to see a spike that is 10 to
1 00 times your normal application load. Even if you autoscale your application instances, a lOx request spike will likely make your database very unhappy.
Let's focus on ElastiCache for Memcached first, because it is the best fit for a caching focused solution.
We'll revisit Redislater in the paper, and weigh its advantages and disadvantages.
Architecture with ElastiCache for Memcached
When you deploy an ElastiCache Memcached cluster, it sits in your application as a separate tier alongside your database. As mentioned previously, Amazon ElastiCache does not directly communicate with your database tier, or indeed have any particular knowledge of your database. A simplified deployment for a web application looks something like this:
In this architecture diagram, the Amazon EC2 application instances are in an Auto Scaling group, located behind a load balancer using Elastic Load Balancing, which distributes requests among the instances. As requests come into a given EC2 instance, that EC2 instance is responsible for communicating with ElastiCache and the database tier. For development purposes, you can begin with a single ElastiCache node to test your application, and then scale to additional cluster nodes by modifying t he ElastiCache cluster. As you add additional cache nodes, the EC2 application instances are able to distribute cache keys across multiple ElastiCache nodes. The most common practice is to use client-side sharding to distribute keys across cache nodes, which we will discuss later in this paper.
When you launch an ElastiCache cluster, you can choose the Availability Zone(s) that the cluster lives in.
For best performance, you should configure your cluster to use the same Availability Zones as your application servers. To launch an ElastiCache cluster in a specific Availability Zone, make sure to specify the Preferred Zone(s) option during cache cluster creation. The Availability Zones that you specify will be where ElastiCache will launch your cache nodes. We recommend that you select Spread Nodes Across Zones, which tells ElastiCache to distribute cache nodes across these zones as evenly as possible. This distribution will mitigate the impact of an Availability Zone disruption on your ElastiCache nodes. The trade-off is that some of the requests from your application to ElastiCache will go to a node in a different Availability Zone, meaning latency will be slightly higher.
For more details, refer to Creating a Cache Cluster in the Amazon ElastiCache User Guide.
As mentioned at the outset, ElastiCache can be coupled with a wide variety of databases. Here is an example architecture that uses Amazon DynamoDB instead of Amazon RDS and MySQL:
This combination of DynamoDB and ElastiCache is very popular with mobile and game companies, because DynamoDB allows for higher write throughput at lower cost than traditional relational databases.
In addition, DynamoDB uses a key-value access pattern similar to ElastiCache, which also simplifies the programming model. Instead of using relational SQL for the primary database but then key-value patterns for the cache, both the primary database and cache can be programmed similarly.
In this architecture pattern, DynamoDB remains the source of truth for data, but application reads are offloaded to ElastiCache for a speed boost.
質問 # 195
An ecommerce company has an application that collects order-related information from customers. The company uses one Amazon DynamoDB table to store customer home addresses, phone numbers, and email addresses. Customers can check out without creating an account. The application copies the customer information to a second DynamoDB table if a customer does create an account.
The company requires a solution to delete personally identifiable information (PII) for customers who did not create an account within 28 days.
Which solution will meet these requirements with the LEAST operational overhead?
正解：B
解説：
Explanation (AWS Docs):
DynamoDB has a built-in feature called Time to Live (TTL) which automatically deletes expired items without manual intervention. This requires adding a timestamp attribute and setting a TTL on the table. This is the lowest operational overhead approach.
"You can use DynamoDB TTL to automatically delete items after a specified time, reducing storage costs and administrative overhead."
- DynamoDB TTL
質問 # 196
A user is aware that a huge download is occurring on his instance. He has already set the Auto Scaling policy to increase the instance count when the network I/O increases beyond a certain limit. How can the user ensure that this temporary event does not result in scaling?
正解：A
解説：
The user may want to stop the automated scaling processes on the Auto Scaling groups either to perform manual operations or during emergency situations. To perform this, the user can suspend one or more scaling processes at any time. Once it is completed, the user can resume all the suspended processes.
Reference: http://docs.aws.amazon.com/AutoScaling/latest/DeveloperGuide/AS_Concepts.html
質問 # 197
An application that is hosted on Amazon EC2 instances needs to access an Amazon S3 bucket Traffic must not traverse the internet How should a solutions architect configure access to meet these requirements?
正解：C
質問 # 198
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AWS-Solutions-Associate模擬試験: https://www.xhs1991.com/AWS-Solutions-Associate.html
P.S. Xhs1991がGoogle Driveで共有している無料かつ新しいAWS-Solutions-Associateダンプ：https://drive.google.com/open?id=15EbGlYk25b4Up76-h5B9sGh3Gg6Msf8O