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| Certification Vendor: | Amazon Web Services |
|---|---|
| Exam Name: | AWS Certified Solutions Architect - Associate |
| Exam Number: | SAA-C03 |
| Certificate Validity Period: | 3 years |
| Passing Score: | 72% |
| Exam Format: | Multiple choice (multiple answers), Multiple choice (single answer) |
| Real Exam Qty: | 65 |
| Available Languages: | Korean, Simplified Chinese, Japanese, English |
| Related Certifications: | AWS Certified SysOps Administrator - Associate AWS Certified Developer - Associate AWS Certified Solutions Architect - Professional |
| Exam Price: | $150 USD |
| Exam Duration: | 130 minutes |
| Sample Questions: | Amazon AWS-Solutions-Associate Sample Questions |
| Exam Way: | In-person testing center or online proctored exam |
| Pre Condition: | No formal prerequisites required. Recommended: 1 year of hands-on experience designing distributed systems on AWS |
| Official Syllabus URL: | https://aws.amazon.com/certification/certified-solutions-architect-associate/ |
>> AWS-Solutions-Associate在線題庫 <<
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AWS 認證解決方案架構 - 副認證在 IT 行業中高度受到重視，因為它展示了候選人在 AWS 平台上設計和部署應用程序的專業知識。此認證適用於與 AWS 服務一起工作的 IT 專業人員，例如開發人員、架構師和系統管理員。SAA-C02 考試非常具有挑戰性，需要候選人對 AWS 服務、架構和部署最佳實踐有深刻的理解。但是，通過考試可以幫助專業人士促進自己的職業發展並增加其收入潛力。
問題 #290
A company has an application that uses an Amazon DynamoDB table for storage. A solutions architect discovers that many requests to the table are not returning the latest data. The company's users have not reported any other issues with database performance. Latency is in an acceptable range.
Which design change should the solutions architect recommend?
答案：A
解題說明：
The most suitable design change for the company's application is to request strongly consistent reads for the table. This change will ensure that the requests to the table return the latest data, reflecting the updates from all prior write operations.
Amazon DynamoDB is a fully managed NoSQL database service that provides fast and predictable performance with seamless scalability. DynamoDB supports two types of read consistency: eventually consistent reads and strongly consistent reads. By default, DynamoDB uses eventually consistent reads, unless users specify otherwise1.
Eventually consistent reads are reads that may not reflect the results of a recently completed write operation.
The response might not include the changes because of the latency of propagating the data to all replicas. If users repeat their read request after a short time, the response should return the updated data. Eventually consistent reads are suitable for applications that do not require up-to-date data or can tolerate eventual consistency1.
Strongly consistent reads are reads that return a result that reflects all writes that received a successful response prior to the read. Users can request a strongly consistent read by setting the ConsistentRead parameter to true in their read operations, such as GetItem, Query, or Scan. Strongly consistent reads are suitable for applications that require up-to-date data or cannot tolerate eventual consistency1.
The other options are not correct because they do not address the issue of read consistency or are not relevant for the use case. Adding read replicas to the table is not correct because this option is not supported by DynamoDB. Read replicas are copies of a primary database instance that can serve read-only traffic and improve availability and performance. Read replicas are available for some relational database services, such as Amazon RDS or Amazon Aurora, but not for DynamoDB2. Using a global secondary index (GSI) is not correct because this option is not related to read consistency. A GSI is an index that has a partition key and an optional sort key that are different from those on the base table. A GSI allows users to query the data in different ways, with eventual consistency3. Requesting eventually consistent reads for the table is not correct because this option is already the default behavior of DynamoDB and does not solve the problem of requests not returning the latest data.
References:
Read consistency - Amazon DynamoDB
Working with read replicas - Amazon Relational Database Service
Working with global secondary indexes - Amazon DynamoDB
問題 #291
A company's web application is using multiple Linux Amazon EC2 instances and storing data on Amazon EBS volumes. The company is looking for a solution to increase the resiliency of the application in case of a failure and to provide storage that complies with atomicity, consistency, isolation, and durability (ACID).
What should a solutions architect do to meet these requirements?
答案：C
解題說明：
Explanation
How Amazon EFS Works with Amazon EC2
The following illustration shows an example VPC accessing an Amazon EFS file system. Here, EC2 instances in the VPC have file systems mounted.
In this illustration, the VPC has three Availability Zones, and each has one mount target created in it. We recommend that you access the file system from a mount target within the same Availability Zone. One of the Availability Zones has two subnets. However, a mount target is created in only one of the subnets.
Benefits of Auto Scaling
Better fault tolerance. Amazon EC2 Auto Scaling can detect when an instance is unhealthy, terminate it, and launch an instance to replace it. You can also configure Amazon EC2 Auto Scaling to use multiple Availability Zones. If one Availability Zone becomes unavailable, Amazon EC2 Auto Scaling can launch instances in another one to compensate.
Better availability. Amazon EC2 Auto Scaling helps ensure that your application always has the right amount of capacity to handle the current traffic demand.
Better cost management. Amazon EC2 Auto Scaling can dynamically increase and decrease capacity as needed. Because you pay for the EC2 instances you use, you save money by launching instances when they are needed and terminating them when they aren't.
https://docs.aws.amazon.com/efs/latest/ug/how-it-works.html#how-it-works-ec2
https://docs.aws.amazon.com/autoscaling/ec2/userguide/auto-scaling-benefits.html
問題 #292
A company slops a cluster of Amazon EC2 instances over a weekend. The costs decrease, but they do not drop to zero Which resources could still be generating costs? (Select TWO.)
答案：C,E
問題 #293
A company is seeing access requests by some suspicious IP addresses. The security team discovers the requests are from different IP addresses under the same CIDR range.
What should a solutions architect recommend to the team?
答案：C
問題 #294
An image-processing company has a web application that users use to upload images. The application uploads the images into an Amazon S3 bucket. The company has set up S3 event notifications to publish the object creation events to an Amazon Simple Queue Service (Amazon SQS) standard queue. The SQS queue serves as the event source for an AWS Lambda function that processes the images and sends the results to users through email.
Users report that they are receiving multiple email messages for every uploaded image. A solutions architect determines that SQS messages are invoking the Lambda function more than once, resulting in multiple email messages.
What should the solutions architect do to resolve this issue with the LEAST operational overhead?
答案：A
問題 #295
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