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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Design Secure Architectures | 30% | - Secure workloads and applications
|
| Topic 2: Design High-Performing Architectures | 24% | - Performance scaling
|
| Topic 3: Design Resilient Architectures | 26% | - Fault tolerance and recovery
|
| Topic 4: Design Cost-Optimized Architectures | 20% | - Cost management tools
|
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NEW QUESTION # 304
A company has a large data workload that runs for 6 hours each day. The company cannot lose any data while the process is running. A solutions architect is designing an Amazon EMR cluster configuration to support this critical data workload.
Which solution will meet these requirements MOST cost-effectively?
Answer: C
Explanation:
For cost-effectiveness and high availability in Amazon EMR workloads, the best approach is to configure atransient cluster(which runs for the duration of the job and then terminates) withOn-Demand Instancesfor the primary and core nodes, andSpot Instancesfor the task nodes. Here's why:
Primary and core nodes on On-Demand Instances: These nodes are critical because they manage the cluster and store data on HDFS. Running them on On-Demand Instances ensures stability and that no data is lost, as Spot Instances can be interrupted.
Task nodes on Spot Instances: Task nodes handle additional processing and can be used with Spot Instances to reduce costs. Spot Instances are much cheaper but can be interrupted, which is fine for non-critical tasks as the framework can handle retries.
Atransient clusteris more cost-effective than a long-running cluster for workloads that only run for 6 hours a day. Transient clusters automatically terminate after the workload completes, saving costs by not keeping the cluster running when it's not needed.
Option A: A long-running cluster may result in unnecessary costs when the cluster isn't being used.
Option C: Running core nodes on Spot Instances risks data loss if the Spot Instances are interrupted, violating the requirement for zero data loss.
Option D: Running both core and task nodes on Spot Instances is highly risky for data-critical workloads.
AWS Reference:
Amazon EMR Cluster Management
Using Spot Instances in EMR
NEW QUESTION # 305
A company is launching a new application that will be hosted on Amazon EC2 instances. A solutions architect needs to design a solution that does not allow public IPv4 access that originates from the internet.
However, the solution must allow the EC2 instances to make outbound IPv4 internet requests.
Answer: C
Explanation:
Why Option C is Correct:
* NAT Gateway: Allows private subnets to access the internet for outbound requests while preventing inbound connections.
* High Availability: Deploying NAT gateways in both AZs ensures fault tolerance.
* Shared Route Table: Simplifies routing configuration for private subnets.
Why Other Options Are Not Ideal:
* Option A: Creating separate route tables for each subnet adds unnecessary complexity.
* Option B: Internet gateways allow inbound access, violating the requirement to block public IPv4 access.
* Option D: Egress-only internet gateways are designed for IPv6, not IPv4.
AWS References:
* Amazon VPC NAT Gateway:AWS Documentation - NAT Gateway
NEW QUESTION # 306
A company wants to improve the availability and performance of its hybrid application. The application consists of a stateful TCP-based workload hosted on Amazon EC2 instances in different AWS Regions and a stateless UDP-based workload hosted on premises.
Which combination of actions should a solutions architect take to improve availability and performance?
(Select TWO.)
Answer: B,E
Explanation:
For improving availability and performance of the hybrid application, the following solutions are optimal:
AWS Global Accelerator (Option A): Global Accelerator provides high availability and improves performance by using the AWS global network to route user traffic to the nearest healthy endpoint (across AWS Regions). By adding the Network Load Balancers as endpoints, Global Accelerator ensures that traffic is routed efficiently to the closest endpoint, improving both availability and performance.
Network Load Balancer (Option D): Thestateful TCP-based workloadhosted on Amazon EC2 instances and thestateless UDP-based workloadhosted on-premises are best served by Network Load Balancers (NLBs).
NLBs are designed to handle TCP and UDP traffic with ultra-low latency and can route traffic to both EC2 and on-premises endpoints.
Option B (CloudFront and Route 53): CloudFront is better suited for HTTP/HTTPS workloads, not for TCP
/UDP-based applications.
Option C (ALB): Application Load Balancers do not support the stateless UDP-based workload, making NLBs the better choice for both TCP and UDP.
AWS References:
AWS Global Accelerator
Network Load Balancer
NEW QUESTION # 307
A company runs a stateless web application in production on a group of Amazon EC2 On-Demand Instances behind an Application Load Balancer. The application experiences heavy usage during an 8-hour period each business day. Application usage is moderate and steady overnight Application usage is low during weekends.
The company wants to minimize its EC2 costs without affecting the availability of the application.
Which solution will meet these requirements?
Answer: B
NEW QUESTION # 308
A company is building a new web application on AWS. The application needs to consume files from a legacy on-premises application that runs a batch process and outputs approximately 1 GB of data every night to an NFS file mount. A solutions architect needs to design a storage solution that requires minimal changes to the legacy application and keeps costs low. Which solution will meet these requirements MOST cost-effectively?
Answer: C
Explanation:
Amazon S3 File Gateway provides a local NFS mount point, which can be used with minimal changes by the legacy application. Files are transparently uploaded to Amazon S3, allowing the web application to access them directly from S3. This is the most cost-effective and operationally simple way to bridge legacy on-premises NFS output with S3, requiring no changes to the batch process.
NEW QUESTION # 309
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