A company wants to run an in-memory database for a latency-sensitive application that runs on Amazon EC2 instances. The application processes more than 100,000 transactions each minute and requires high network throughput. A solutions architect needs to provide a cost-effective network design that minimizes data transfer charges.Which solution meets these requirements?
Answer(s): A
Launching all EC2 instances in the same AZ within the same region and using a cluster placement group concentrates low-latency, high-throughput inter-instance networking, reducing cross-AZ data transfer and network latency for an in-memory, latency-sensitive workload.A) Correct. Cluster placement group keeps instances physically close, lowering network latency and data transfer costs for in-memory workloads.B) Wrong. Partition strategy across AZs introduces more inter-AZ traffic and higher latency/costs, degrading performance for a cache-like in-memory DB.C) Wrong. Auto Scaling across AZs improves availability but may increase cross-AZ data transfer and latency; placement strategy not addressed.D) Wrong. Step scaling across AZs focuses on throughput targets but does not optimize inter-instance bandwidth or placement for latency-sensitive memory workloads.
A company that primarily runs its application servers on premises has decided to migrate to AWS. The company wants to minimize its need to scale its Internet Small Computer Systems Interface (iSCSI) storage on premises. The company wants only its recently accessed data to remain stored locally.Which AWS solution should the company use to meet these requirements?
Answer(s): D
Caching with Volume Gateway cached volumes keeps most data in AWS while retaining recently accessed data locally, reducing on-premises iSCSI storage growth and minimizing local scaling. It meets the requirement to keep only recently accessed data locally while migrating from on-prem to AWS.A) S3 File Gateway primarily provides object storage access via NFS/SMB and is not optimized for iSCSI and on-premises block storage caching.B) Tape Gateway emulates tape libraries for archival, not suitable for active recently accessed data caching.C) Stored volumes keep all data on-premises and syncs to AWS, not minimizing local storage as requested.D) Cached volumes specifically cache hot data in local storage and tier the rest to AWS.
A company has multiple AWS accounts that use consolidated billing. The company runs several active high performance Amazon RDS for Oracle On-Demand DB instances for 90 days. The company’s finance team has access to AWS Trusted Advisor in the consolidated billing account and all other AWS accounts.The finance team needs to use the appropriate AWS account to access the Trusted Advisor check recommendations for RDS. The finance team must review the appropriate Trusted Advisor check to reduce RDS costs.Which combination of steps should the finance team take to meet these requirements? (Choose two.)
Answer(s): B,D
The Consolidated Billing account provides centralized Trusted Advisor checks across all member accounts, enabling the finance team to view RDS-related recommendations for the entire organization in one place (B). The Idle DB Instances check helps identify underutilized RDS instances that can be right-sized or terminated to save costs, which is essential for 90-day on-demand Oracle RDS instances (D). A is incorrect becauseTrusted Advisor in a member account does not aggregate across accounts; B is correct for visibility. C is too narrow; it targets RI optimization but Oracle on-demand requires identifying idle instances first. E is irrelevant to RDS cost optimization.
A solutions architect needs to optimize storage costs. The solutions architect must identify any Amazon S3 buckets that are no longer being accessed or are rarely accessed.Which solution will accomplish this goal with the LEAST operational overhead?
S) A) S3 Storage Lens provides comprehensive, automated usage and access patterns across all buckets with minimal setup, enabling identification of rarely accessed or unused buckets at scale.B) S3 dashboard alone offers basic metrics and lacks the breadth of Storage Lens insights needed for efficient, low-effort optimization.C) CloudWatch BucketSizeBytes shows size, not access frequency, and using Athena adds manual querying overhead.D) CloudTrail logs track API activity but require substantial processing and correlation to infer access patterns, increasing operal overhead.
A company sells datasets to customers who do research in artificial intelligence and machine learning (AI/ML). The datasets are large, formatted files that are stored in an Amazon S3 bucket in the us-east-1 Region. The company hosts a web application that the customers use to purchase access to a given dataset. The web application is deployed on multiple Amazon EC2 instances behind an Application Load Balancer. After a purchase is made, customers receive an S3 signed URL that allows access to the files.The customers are distributed across North America and Europe. The company wants to reduce the cost that is associated with data transfers and wants to maintain or improve performance.What should a solutions architect do to meet these requirements?
Answer(s): B
CloudFront delivers content from an edge network close to users, reducing latency and egress costs for global customers while keeping S3 as the origin and using signed URLs (or signed cookies) for secure access. A) S3 Transfer Acceleration is region-specific and increases cost with unclear latency benefits for global users; not ideal for fine-grained access control. C) Cross-region replication adds cost and complexity; it doesn’t improve latency for direct authenticated access to signed URLs. D) Streaming via app-level access removes direct S3 access control and is not advantageous for large datasets and signed URL-based authentication. B is the correct approach for global performance with secure access.
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