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Amazon AWS-Developer（AWS Certified Developer - Associate）試験は、AWSサービスを理解し、AWSアプリケーションを開発・維持する能力を持つプロフェッショナル向けの認定試験です。この試験は、AWSサービスを使用したクラウドベースのアプリケーションを開発・展開する能力を評価します。この認定試験は、AWS開発におけるスキルを向上させ、混雑した求職市場で差別化を図りたい開発者にとって理想的です。 Amazon AWS Certified Developer Associate Exam (DVA-C02) 認定 AWS-Certified-Developer-Associate 試験問題 (Q99-Q104):質問 # 99
An online gaming site asked you if you can deploy a database that is a fast, highly scalable NoSQL
database service in AWS for a new site that he wants to build. Which database should you recommend?
A. Amazon Redshift
B. Amazon SimpleDB
C. Amazon RDS
D. Amazon DynamoDB
正解：D
解説：
Amazon DynamoDB is ideal for database applications that require very low latency and predictable
performance at any scale but don't need complex querying capabilities like joins or transactions. Amazon
DynamoDB is a fully-managed NoSQL database service that offers high performance, predictable
throughput and low cost. It is easy to set up, operate, and scale.
With Amazon DynamoDB, you can start small, specify the throughput and storage you need, and easily
scale your capacity requirements on the fly. Amazon DynamoDB automatically partitions data over a
number of servers to meet your request capacity. In addition, DynamoDB automatically replicates your
data synchronously across multiple Availability Zones within an AWS Region to ensure high-availability
and data durability.
Reference: https://aws.amazon.com/running_databases/#dynamodb_anchor
質問 # 100
What type of block cipher does Amazon S3 offer for server side encryption?
質問 # 101
A developer needs to secure the static assets in a company's Amazon S3 bucket that is named DOC-EXAMPLE-BUCKET. The company has an Amazon CtoudFront distribution that serves the S3 bucket's assets to the public. The developer has already created the origin access identity (OAI) and has associated the OAI with the distribution. The developer must write a bucket policy that allows only the CloudFront distribution to access the S3 bucket Which policy will meet this requirement MOST securely?
A)
B)
C)
D)
A. Option A
B. Option D
C. Option B
D. Option C
正解：D
質問 # 102
A company is building a content authoring application. The application has multiple user groups, such as content creator, reviewer, approver, and administrator. The company needs to assign users fine-grained permissions for specific parts of the application.
The company needs a solution to configure, maintain, and analyze user permissions. The company wants a solution that can be easily adapted to work with newer applications in the future. The company must use a third-party OpenID Connect (OIDC) identity provider (IdP) to authenticate users.
A. Use Amazon Verified Permissions to set up user permissions. Integrate Verified Permissions with a third-party IdP. Configure the application to request authorization decisions from Verified Permissions.
B. Configure the application to check user permissions upon request. Configure the application logic to manage user permissions.
C. Set up an IAM role for each user group. Assign users appropriate IAM roles. Configure the application to determine appropriate permissions for each user based on the user's IAM role.
D. Configure an Amazon Cognito identity pool for the application. Use the identity pool identities within the application to manage user permissions.
正解：A
解説：
* Why Option C is Correct:Amazon Verified Permissions provides fine-grained access control capabilities, making it ideal for managing complex user permissions. It integrates with OIDC IdPs for authentication and allows applications to request authorization decisions dynamically. It is also easily adaptable to newer applications.
* Why Other Options are Incorrect:
* Option A: Cognito identity pools do not natively support fine-grained permission analysis or management.
* Option B: Managing permissions in application logic adds significant operational overhead.
* Option D: IAM roles are not designed for application-specific fine-grained access control and are more suitable for resource-level permissions.
* AWS Documentation References:
* Amazon Verified Permissions
質問 # 103
Developer is creating an AWS Lambda function to process a stream of data from an Amazon Kinesis Data Stream. When the Lambda function parses the data and encounters a missing field, it exits the function with an error. The function is generating duplicate records from the Kinesis stream. When the Developer looks at the stream output without the Lambda function, there are no duplicate records.
What is the reason for the duplicates?
A. The Lambda function is not keeping up with the amount of data coming from the stream.
B. The Lambda function did not advance the Kinesis stream pointer to the next record after the error.
C. The Lambda event source used asynchronous invocation, resulting in duplicate records.
D. The Lambda function did not handle the error, and the Lambda service attempted to reprocess the data.
