ちなみに、CertJuken SOA-C03の一部をクラウドストレージからダウンロードできます：https://drive.google.com/open?id=1Ja8smFcu6EFCCQTSYgkM0BccHeF4E9eA
AmazonのSOA-C03認定試験は今IT業界の人気試験で多くのIT業界の専門の人士がITの関連の認証試験を取りたいです。Amazonの認証試験の合格書を取ってから更にあなたのIT業界での仕事にとても助けがあると思います。
| Certification Vendor: | AWS |
|---|---|
| Exam Name: | AWS Certified CloudOps Engineer - Associate |
| Exam Number: | SOA-C03 |
| Exam Price: | USD 150 |
| Available Languages: | Korean, Simplified Chinese, Japanese, English |
| Exam Duration: | 130 minutes |
| Passing Score: | 720 (scaled score, out of 100-1000) |
| Related Certifications: | AWS Certified CloudOps Engineer - Associate |
| Certificate Validity Period: | 3 years |
| Real Exam Qty: | 65 (50 scored, 15 unscored) |
| Exam Format: | Multiple response, Multiple choice |
| Sample Questions: | Amazon SOA-C03 Sample Questions |
| Exam Way: | Online (proctored) or at a testing center (Pearson VUE or PSI) |
| Pre Condition: | Recommended: 1 year of experience with AWS deployment, management, troubleshooting, networking, and security. Experience in an operations role such as system administrator is helpful. |
| Official Syllabus URL: | https://docs.aws.amazon.com/aws-certification/latest/sysops-administrator-associate-03/sysops-administrator-associate-03.html |
SOA-C03認定試験に合格することは難しいようですね。試験を申し込みたいあなたは、いまどうやって試験に準備すべきなのかで悩んでいますか。そうだったら、下記のものを読んでください。いまSOA-C03試験に合格するショートカットを教えてあげますから。あなたを試験に一発合格させる素晴らしいSOA-C03試験に関連する参考書が登場しますよ。それはCertJukenのSOA-C03問題集です。気楽に試験に合格したければ、はやく試しに来てください。
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質問 # 147
A company uses AWS Lambda to process files that users upload to an Amazon S3 bucket. When a user uploads a file to the S3 bucket, S3 Event Notifications invokes a Lambda function to process the file.
The company wants to automatically invoke the Lambda function only for flies with a .txt extension that users upload to the S3 bucket.
Which solution will meet these requirements?
正解：B
解説：
S3 Event Notifications can be configured for object creation events and can use suffix filtering so the Lambda function is invoked only when uploaded object keys end with .txt. This directly filters uploads at the S3 notification configuration level before invoking the function.
質問 # 148
A CloudOps engineer is creating a simple, public-facing website running on Amazon EC2. The CloudOps engineer created the EC2 instance in an existing public subnet and assigned an Elastic IP address. The CloudOps engineer created a new security group that allows incoming HTTP traffic from 0.0.0.0/0. The CloudOps engineer also created a new network ACL and applied it to the subnet to allow incoming HTTP traffic from 0.0.0.0/0. However, the website cannot be reached from the internet.
What is the cause of this issue?
正解：A
解説：
Network ACLs are stateless, meaning both inbound and outbound rules must explicitly allow traffic. While inbound HTTP traffic (port 80) was allowed, the return traffic from the EC2 instance uses ephemeral ports (typically 1024-65535). If outbound rules do not allow this ephemeral port range, the response traffic is dropped, preventing the website from loading.
Security groups are stateful and automatically allow return traffic, but network ACLs do not. This commonly causes connectivity issues when custom ACLs are applied without matching outbound rules.
Option B is incorrect because security groups allow all outbound traffic by default. Option C is irrelevant.
Option D is incorrect because only one network ACL can be associated with a subnet at a time.
Thus, the missing outbound ephemeral port rule in the network ACL is the root cause.
質問 # 149
A company moves workloads from public subnets to private subnets to improve security. During testing, the company discovers that servers in the private subnets cannot reach an external API.
The VPC has a CIDR block of 10.0.0.0/16. The VPC contains two public subnets and two private subnets. The VPC has one internet gateway and has a NAT gateway in each of the private subnets.
The company must ensure that workloads that run in the private subnets can reach the external API.
Which solution will meet this requirement?
正解：A
解説：
Instances in private subnets do not have direct routes to an internet gateway, so they cannot reach public internet endpoints unless the VPC provides a managed egress path. The standard AWS architecture for private-subnet outbound internet access is to use a NAT device (typically a NAT gateway) placed in a public subnet, with an Elastic IP address and a route from the private subnet to that NAT gateway for 0.0.0.0/0 traffic. The NAT gateway then forwards traffic to the internet through the VPC's internet gateway while preventing unsolicited inbound connections to the private instances.
The scenario states that the VPC has a NAT gateway in each private subnet. That placement prevents proper egress because a NAT gateway itself must be in a public subnet with a route to the internet gateway to function for internet-bound traffic. Without that, private instances will fail to reach external services such as a third-party API, exactly as observed.
Option C corrects the architecture by deploying NAT gateways in the public subnets with Elastic IPs and updating the private subnet route tables so that outbound internet traffic targets the NAT gateways. This enables private workloads to initiate outbound connections while remaining unreachable from the public internet directly, maintaining the intended security posture.
質問 # 150
A user working in the Amazon EC2 console increased the size of an Amazon Elastic Block Store (Amazon EBS) volume attached to an Amazon EC2 Windows instance. The change is not reflected in the file system.
What should a CloudOps engineer do to resolve this issue?
正解：A
解説：
When an Amazon EBS volume is resized, the new storage capacity is immediately available to the attached EC2 instance. However, EBS does not automatically extend the file system. The CloudOps engineer must manually extend the file system within the operating system to utilize the additional space.
AWS documentation for EC2 and EBS specifies:
"After you increase the size of an EBS volume, use file system-specific tools to extend the file system so that the operating system can use the new storage capacity." On Windows instances, this can be achieved through Disk Management or diskpart commands. On Linux systems, utilities such as growpart and resize2fs are used.
Options B and C do not modify file system metadata and are ineffective. Option D unnecessarily replaces the volume, which adds risk and downtime. Thus, Option A aligns with the Monitoring and Performance Optimization practices of AWS CloudOps by properly extending the file system to recognize the new capacity.
References (AWS CloudOps Documents / Study Guide):
* AWS Certified CloudOps Engineer - Associate (SOA-C03) Exam Guide - Domain 1
* Amazon EBS - Modifying EBS Volumes
* Amazon EC2 User Guide - Extending a File System After Resizing a Volume
* AWS Well-Architected Framework - Performance Efficiency Pillar
質問 # 151
A company operates compute resources in a VPC and in the company's on-premises data center. The company already has an AWS Direct Connect connection between the VPC and the on-premises data center.
A CloudOps engineer needs to ensure that Amazon EC2 instances in the VPC can resolve DNS names for hosts in the on-premises data center.
Which solution will meet this requirement with the LEAST amount of ongoing maintenance?
正解：C
解説：
Amazon Route 53 Resolver outbound endpoints enable Amazon VPC resources to forward DNS queries to DNS servers that are outside of AWS, such as on-premises DNS servers. Because the company already has AWS Direct Connect in place, DNS queries can be routed privately from the VPC to the on-premises DNS infrastructure without using the public internet.
By creating an outbound endpoint and configuring forwarding rules for the on-premises domains, EC2 instances in the VPC can resolve DNS names dynamically using the existing authoritative DNS servers. This approach requires minimal ongoing maintenance because DNS records continue to be managed centrally in the on-premises DNS system.
Manually populating a private hosted zone or /etc/hosts files would require constant updates and does not scale. Reverse DNS forwarding alone does not solve forward name resolution.
Therefore, using Route 53 Resolver outbound endpoints is the correct solution.
質問 # 152
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SOA-C03受験内容: https://www.certjuken.com/SOA-C03-exam.html
P.S. CertJukenがGoogle Driveで共有している無料かつ新しいSOA-C03ダンプ：https://drive.google.com/open?id=1Ja8smFcu6EFCCQTSYgkM0BccHeF4E9eA