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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Design Secure Architectures | 30% | - Secure access to AWS resources
|
| Topic 2: Design Cost-Optimized Architectures | 20% | - Cost-effective resource selection
|
| Topic 3: Design High-Performing Architectures | 24% | - Compute and storage optimization
|
| Topic 4: Design Resilient Architectures | 26% | - Highly available architecture
|
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問題 #373
A company needs to migrate a MySQL database from its on-premises data center to AWS within 2 weeks. The database is 20 TB in size. The company wants to complete the migration with minimal downtime.
Which solution will migrate the database MOST cost-effectively?
答案：C
解題說明：
This answer is correct because it meets the requirements of migrating a 20 TB MySQL database within 2 weeks with minimal downtime and cost-effectively. The AWS Snowball Edge Storage Optimized device has up to 80 TB of usable storage space, which is enough to fit the database. The AWS Database Migration Service (AWS DMS) can migrate data from MySQL to Amazon Aurora, Amazon RDS for MySQL, or MySQL on Amazon EC2 with minimal downtime by continuously replicating changes from the source to the target. The AWS Schema Conversion Tool (AWS SCT) can convert the source schema and code to a format compatible with the target database. By using these services together, the company can migrate the database to AWS with minimal downtime and cost. The Snowball Edge device can be shipped back to AWS to finish the migration and continue the ongoing replication until the database is fully migrated.
References:
https://docs.aws.amazon.com/snowball/latest/developer-guide/device-differences.html
https://docs.aws.amazon.com/dms/latest/userguide/CHAP_Source.MySQL.html
https://docs.aws.amazon.com/SchemaConversionTool/latest/userguide/CHAP_Source.MySQL.htm
問題 #374
[Design Secure Architectures]
A company is migrating five on-premises applications to VPCs in the AWS Cloud. Each application is currently deployed in isolated virtual networks on premises and should be deployed similarly in the AWS Cloud. The applications need to reach a shared services VPC. All the applications must be able to communicate with each other.
If the migration is successful, the company will repeat the migration process for more than 100 applications.
Which solution will meet these requirements with the LEAST administrative overhead?
答案：C
解題說明：
Understanding the Requirement: The company needs to migrate applications to AWS, maintaining isolated networks while allowing communication with a shared services VPC and among the applications.
Analysis of Options:
Software VPN Tunnels: This approach involves high administrative overhead and complexity in managing multiple VPN connections.
VPC Peering: While suitable for smaller numbers of VPCs, it becomes complex and hard to manage at scale with over 100 applications.
Direct Connect: Primarily used for high-bandwidth, low-latency connections to on-premises networks, not inter-VPC communication.
Transit Gateway: Simplifies network management by acting as a central hub, allowing easy routing and scalability as more applications are migrated.
Best Solution:
Transit Gateway: This provides a scalable, efficient solution with minimal administrative overhead for managing network connections between multiple VPCs and the shared services VPC.
Reference:
AWS Transit Gateway
Building a Transit Gateway
問題 #375
A company maintains its accounting records in a custom application that runs on Amazon EC2 instances. The company needs to migrate the data to an AWS managed service for development and maintenance of the application dat a. The solution must require minimal operational support and provide immutable, cryptographically verifiable logs of data changes.
Which solution will meet these requirements MOST cost-effectively?
答案：A
解題說明：
Amazon QLDB is the most cost-effective and suitable service for maintainingimmutable, cryptographically verifiable logsof data changes. QLDB provides a fully managed ledgerdatabase with a built-in cryptographic hash chain, making it ideal for recording changes to accounting records, ensuring data integrity and security.
QLDB reduces operational overhead by offering fully managed services, so there's no need for server management, and it's built specifically to ensure immutability and verifiability, making it the best fit for the given requirements.
Option A (Redshift): Redshift is designed for analytics and not for immutable, cryptographically verifiable logs.
Option B (Neptune): Neptune is a graph database, which is not suitable for this use case.
Option C (Timestream): Timestream is a time series database optimized for time-stamped data, but it does not provide immutable or cryptographically verifiable logs.
AWS Reference:
Amazon QLDB
How QLDB Works
問題 #376
A company hosts its web application on AWS using seven Amazon EC2 instances. The company requires that the IP addresses of all healthy EC2 instances be returned in response to DNS queries.
Which policy should be used to meet this requirement?
答案：C
解題說明：
Explanation
Use a multivalue answer routing policy to help distribute DNS responses across multiple resources. For example, use multivalue answer routing when you want to associate your routing records with a Route 53 health check. For example, use multivalue answer routing when you need to return multiple values for a DNS query and route traffic to multiple IP addresses.
https://aws.amazon.com/premiumsupport/knowledge-center/multivalue-versus-simple-policies/
問題 #377
A company hosts its multi-tier applications on AWS. For compliance, governance, auditing, and security, the company must track configuration changes on its AWS resources and record a history of API calls made to these resources.
What should a solutions architect do to meet these requirements?
答案：D
解題說明：
Explanation
AWS Config is a fully managed service that allows the company to assess, audit, and evaluate the configurations of its AWS resources. It provides a detailed inventory of the resources in use and tracks changes to resource configurations. AWS Config can detect configuration changes and alert the company when changes occur. It also provides a historical view of changes, which is essential for compliance and governance purposes. AWS CloudTrail is a fully managed service that provides a detailed history of API calls made to the company's AWS resources. It records all API activity in the AWS account, including who made the API call, when the call was made, and what resources were affected by the call. This information is critical for security and auditing purposes, as it allows the company to investigate any suspicious activity that might occur on its AWS resources.
問題 #378
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