A company has developed a new video game as a web application. The application is in a three-tier architecture in a VPC with Amazon RDS for MySQL in the database layer. Several players will compete concurrently online. The game’s developers want to display a top-10 scoreboard in near-real time and offer the ability to stop and restore the game while preserving the current scores.What should a solutions architect do to meet these requirements?
Answer(s): B
ElastiCache for Redis provides in-memory data store with fast reads/writes and supports pub/sub and atomic operations, ideal for real-time top-10 scoreboards and persisting current scores during stop/restore. It offloads read-heavy scoreboard queries from RDS MySQL and can be updated in real time by game logic.A) Memcached lacks data persistence and advanced data structures; Redis offers richer data types and atomic ops. C) CloudFront caches content at edge; not suitable for dynamic, real-time scoreboard state. D) RDS read replicas improve read scaling but do not provide sub-second updates or real-time in-memory scoring; persistence and restore signaling are not optimized.
An ecommerce company wants to use machine learning (ML) algorithms to build and train models. The company will use the models to visualize complex scenarios and to detect trends in customer data. The architecture team wants to integrate its ML models with a reporting platform to analyze the augmented data and use the data directly in its business intelligence dashboards.Which solution will meet these requirements with the LEAST operational overhead?
SageMaker provides end-to-end ML building/training with managed infrastructure and model hosting, while QuickSight offers native BI visualization and dashboards, delivering the least operational overhead for integration and reporting.A) Glue ML transforms are sparse for training and visualization; OpenSearch adds more orchestration overhead. C) Marketplace AMI incurs unmanaged maintenance; OpenSearch for visualization adds complexity. D) QuickSight is not a model-building platform; it’s a BI tool, so cannot train models.
A company is running its production and nonproduction environment workloads in multiple AWS accounts. The accounts are in an organization in AWS Organizations. The company needs to design a solution that will prevent the modification of cost usage tags.Which solution will meet these requirements?
Answer(s): C
A concise explanation of the correct choice and why others are incorrect:C) A service control policy (SCP) can centrally enforce permissions across all accounts in an AWS Organization, preventing tag modification unless explicitly allowed, meeting the requirement to prevent cost usage tag changes at the organizational level.A) Custom AWS Config rule cannot enforce deny permissions; Config assesses compliance but does not block actions across accounts.B) CloudTrail records actions but does not prevent modifications.D) CloudWatch logs are for monitoring and alerting; they do not enforce deny permissions.
A company hosts its application in the AWS Cloud. The application runs on Amazon EC2 instances behind an Elastic Load Balancer in an Auto Scaling group and with an Amazon DynamoDB table. The company wants to ensure the application can be made available in anotherAWS Region with minimal downtime.What should a solutions architect do to meet these requirements with the LEAST amount of downtime?
Answer(s): A
A) Correct. In a DR scenario with minimal downtime, pre-create an Auto Scaling group and load balancer in the DR region, use DynamoDB global tables for cross-region replication, and configure Route 53 DNS failover to switch traffic to the DR region’s load balancer quickly.B) Incorrect. DNS failover alone is not sufficient without wiring a DR-capable environment; launching only on demand may incur longer recovery and lacks a ready multi-region DynamoDB setup.C) Incorrect. DynamoDB global tables provide cross-region replication for DynamoDB but omits an always-on DR Auto Scaling group and load balancer in the DR region, risking longer downtime.D) Incorrect. While DNS failover is used, relying on CloudWatch/Lambda for DNS updates adds complexity and potential delay; the DR resources should be pre-provisioned for instant failover.
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?
A) Correct: Snowball Edge Storage Optimized provides cost-effective, offline bulk transfer for 20 TB, supports DMS/SCT replication, and allows finishing cutover with ongoing replication without high ongoing costs. B) Snowmobile is unnecessary and overkill for 20 TB, high cost and longer logistics. C) Snowball Edge Compute Optimized with GPU adds unnecessary compute capabilities not required for migration. D) 1 Gbps Direct Connect adds ongoing dedicated bandwidth costs and isn’t needed for offline bulk transfer plus may slow migration and increase cost.
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