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Amazon SAA-C03（Amazon AWS Certified Solutions Architect-Associate）認定試験は、Amazon Web Services（AWS）プラットフォーム上のスケーラブル、高度に利用可能な、およびフォールトトレラントシステムの設計と展開の専門知識を確立したいITプロフェッショナル向けに設計されています。この試験は、AWSサービスを扱った経験があり、AWSクラウドコンピューティングの基本的な知識を持っている個人を対象としています。

Amazon AWS Certified Solutions Architect - Associate 認定 SAA-C03 試験問題 (Q190-Q195):

質問 # 190
A company uses Amazon FSx for NetApp ONTAP in its primary AWS Region for CIFS and NFS file shares.
Applications that run on Amazon EC2 instances access the file shares. The company needs a storage disaster recovery (DR) solution in a secondary Region. The data that is replicated in the secondary Region needs to be accessed by using the same protocols as the primary Region.
Which solution will meet these requirements with the LEAST operational overhead?

A. Create an AWS Lambda function to copy the data to an Amazon S3 bucket. Replicate the S3 bucket to the secondary Region.
B. Create an Amazon EFS volume. Migrate the current data to the volume. Replicate the volume to the secondary Region.
C. Create an FSx for ONTAP instance in the secondary Region. Use NetApp SnapMirror to replicate data from the primary Region to the secondary Region.
D. Create a backup of the FSx for ONTAP volumes by using AWS Backup. Copy the volumes to the secondary Region. Create a new FSx for ONTAP instance from the backup.

正解：C

解説：
The correct answer is C because the company already uses Amazon FSx for NetApp ONTAP and requires a disaster recovery solution in a secondary Region that preserves access through the same protocols , specifically CIFS and NFS . The most appropriate solution is to deploy a second FSx for ONTAP file system in the secondary Region and use NetApp SnapMirror to replicate data between Regions. SnapMirror is built for ONTAP-based replication and is the native mechanism for efficient, storage-level disaster recovery.
This option provides the least operational overhead because it uses the capabilities already integrated into FSx for ONTAP rather than introducing another storage platform or custom replication tooling. It also preserves protocol compatibility, so applications in the recovery Region can continue to access data through CIFS and NFS without architectural changes.
Option A is incorrect because replicating data to Amazon S3 does not preserve native CIFS and NFS file shares. Option B can support recovery, but backups and restores are not the best fit for an active DR strategy where the secondary Region needs accessible replicated storage with the same protocols and lower recovery effort. Option D is incorrect because Amazon EFS does not provide CIFS/SMB support in the same way as FSx for ONTAP and would require a platform change.
AWS guidance for FSx for ONTAP disaster recovery favors using SnapMirror replication to another FSx for ONTAP deployment. This approach is protocol-compatible, efficient, and operationally simpler than building a custom DR workflow.

質問 # 191
A company is building a suite of RESTful microservices that will be exposed through public endpoints. The company requires a scalable solution to ensure that the microservices handle sudden traffic spikes from global users, minimize latency, and offload requests from the backend microservices.
Which solution will meet these requirements?

A. Create an Amazon API Gateway REST API. Deploy the microservices on Amazon EC2 instances and integrate the microservices as the API backend. Create an accelerator in AWS Global Accelerator and set the REST API as the endpoint.
B. Deploy the microservices on Amazon EC2 instances in a spread placement group. Assign Elastic IP addresses to the instances. Expose the microservices through Regional public endpoints.
C. Create an Amazon API Gateway REST API. Deploy the microservices to AWS Lambda functions and integrate the microservices with the REST API. Use Regional endpoints that use standard routing.
D. Create an Amazon API Gateway REST API. Deploy the microservices to AWS Lambda functions and integrate the microservices with the REST API. Create an Amazon CloudFront distribution and set the REST API as the origin.

正解：D

解説：
Amazon API Gateway with AWS Lambda provides a scalable serverless architecture for RESTful microservices and can automatically handle sudden changes in request volume. Adding Amazon CloudFront in front of the REST API improves performance for global users by caching eligible responses at edge locations, reducing latency, and offloading repeated requests from the backend services.

質問 # 192
A company's website is used to sell products to the public. The site runs on Amazon EC2 instances in an Auto Scaling group behind an Application Load Balancer (ALB). There is also an Amazon CloudFront distribution, and AWS WAF is being used to protect against SQL injection attacks. The ALB is the origin for the CloudFront distribution. A recent review of security logs revealed an external malicious IP that needs to be blocked from accessing the website.
What should a solutions architect do to protect the application?

A. Modify the network ACL on the CloudFront distribution to add a deny rule for the malicious IP address.
B. Modify the network ACL for the EC2 instances in the target groups behind the ALB to deny the malicious IP address.
C. Modify the security groups for the EC2 instances in the target groups behind the ALB to deny the malicious IP address.
D. Modify the configuration of AWS WAF to add an IP match condition to block the malicious IP address.

正解：D

解説：
AWS WAF is a web application firewall that helps protect web applications from common web exploits that could affect application availability, compromise security, or consume excessive resources. AWS WAF allows users to create rules that block, allow, or count web requests based on customizable web security rules. One of the types of rules that can be created is an IP match rule, which allows users to specify a list of IP addresses or IP address ranges that they want to allow or block. By modifying the configuration of AWS WAF to add an IP match condition to block the malicious IP address, the solution architect can prevent the attacker from accessing the website through the CloudFront distribution and the ALB.
The other options are not correct because they do not effectively block the malicious IP address from accessing the website. Modifying the network ACL on the CloudFront distribution or the EC2 instances in the target groups behind the ALB will not work because network ACLs are stateless and do not evaluate traffic at the application layer. Modifying the security groups for the EC2 instances in the target groups behind the ALB will not work because security groups are stateful and only evaluate traffic at the instance level, not at the load balancer level.
Reference:
AWS WAF
How AWS WAF works
Working with IP match conditions

質問 # 193
A company is developing a social media application that must scale to meet demand spikes and handle ordered processes.
Which AWS services meet these requirements?

A. Elastic Beanstalk, RDS, and SNS for decoupling.
B. ECS with Fargate, RDS, and SNS for decoupling.
C. DynamoDB, Lambda, DynamoDB Streams, and Step Functions.
D. ECS with Fargate, RDS, and SQS for decoupling.

正解：D

解説：
* Option A combines ECS with Fargate for scalability, RDS for relational data, and SQS for decoupling with message ordering (FIFO queues).
* Option B uses SNS, which does not maintain message order.
* Option C is suitable for serverless workflows but not relational data.
* Option D relies on Elastic Beanstalk, which offers less flexibility for scaling.

質問 # 194
There was an incident in your production environment where the user data stored in the S3 bucket has been accidentally deleted by one of the Junior DevOps Engineers. The issue was escalated to your manager and after a few days, you were instructed to improve the security and protection of your AWS resources.
What combination of the following options will protect the S3 objects in your bucket from both accidental deletion and overwriting? (Select TWO.)

A. Disallow S3 Delete using an IAM bucket policy
B. Enable Amazon S3 Intelligent-Tiering
C. Enable Multi-Factor Authentication Delete
D. Enable Versioning
E. Provide access to S3 data strictly through pre-signed URL only

正解：C、D

解説：
By using Versioning and enabling MFA (Multi-Factor Authentication) Delete, you can secure and recover your S3 objects from accidental deletion or overwrite.
Versioning is a means of keeping multiple variants of an object in the same bucket. Versioning-enabled buckets enable you to recover objects from accidental deletion or overwrite. You can use versioning to preserve, retrieve, and restore every version of every object stored in your Amazon S3 bucket. With versioning, you can easily recover from both unintended user actions and application failures.
You can also optionally add another layer of security by configuring a bucket to enable MFA (Multi-Factor Authentication) Delete, which requires additional authentication for either of the following operations:
- Change the versioning state of your bucket
- Permanently delete an object version
MFA Delete requires two forms of authentication together:
- Your security credentials
- The concatenation of a valid serial number, a space, and the six-digit code displayed on an approved authentication device Providing access to S3 data strictly through pre-signed URL only is incorrect since a pre-signed URL gives access to the object identified in the URL. Pre-signed URLs are useful when customers perform an object upload to your S3 bucket, but does not help in preventing accidental deletes.
Disallowing S3 Delete using an IAM bucket policy is incorrect since you still want users to be able to delete objects in the bucket, and you just want to prevent accidental deletions. Disallowing S3 Delete using an IAM bucket policy will restrict all delete operations to your bucket.
Enabling Amazon S3 Intelligent-Tiering is incorrect since S3 intelligent tiering does not help in this situation.
Explanation:
Reference:
https://docs.aws.amazon.com/AmazonS3/latest/dev/Versioning.html Check out this Amazon S3 Cheat Sheet: https://tutorialsdojo.com/amazon-s3/

質問 # 195
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