All practice questions

A company is migrating a financial transaction application to AWS. The application database tier uses Amazon RDS for PostgreSQL. The database must be highly available with automatic failover to support a low recovery time objective (RTO) during an Availability Zone outage. Additionally, the application must offload read-intensive reporting queries from the primary database to prevent performance degradation on write operations.

Which combination of database configurations will meet these requirements? (Select TWO.)

An application experiences sudden, highly unpredictable spikes in database write traffic during marketing events, followed by long periods of complete inactivity. Which Amazon DynamoDB capacity configuration is the most cost-effective for this workload?

A company is migrating its corporate Windows-based file share application to AWS. The application uses the Server Message Block (SMB) protocol and integrates with Microsoft Active Directory to enforce file-level permissions (ACLs) and user storage quotas. During peak hours, the storage solution must scale dynamically to deliver up to $2\text{ GB/s}$ of throughput with sub-millisecond latencies. Which storage solution should a solutions architect recommend to meet these requirements?

A company is designing a serverless backend for an application. The database experiences sudden, unpredictable spikes in traffic followed by long periods of idle time. The application also needs to process transactional orders sequentially in the exact order they are received. Which two options should the solutions architect select to meet these requirements in the most cost-effective manner?

A research institution stores two types of data in a single Amazon S3 bucket using different prefixes:

* Genomic Sequence Datasets (stored under the `genomics/` prefix): The average file size is $250\text{ MB}$. These files are accessed frequently during the first 35 days after creation. After 35 days, they are rarely accessed but must be retained for $10\text{ years}$ for regulatory compliance. When access is required, the datasets must be retrievable within minutes.
* Intermediate Pipeline Run Logs (stored under the `logs/` prefix): The average file size is $10\text{ KB}$. These files are only needed for debugging within the first 14 days of creation, after which they can be permanently deleted.

Which combination of actions will meet these requirements in the most cost-effective manner? (Select TWO.)

A materials science laboratory is deploying a distributed crystalline structure simulation on Amazon EC2 instances. The simulation nodes run a specialized Message Passing Interface (MPI) application that requires sub-10 microsecond network latency. The coordination service runs on port $9095$. A Network Load Balancer (NLB) is configured to route traffic to the instances, but all instances are currently marked as unhealthy in the target group, and latency between the nodes is suboptimal. Which combination of actions will resolve the latency issues and fix the health check failures?

A media company is designing a globally distributed video-on-demand (VOD) streaming application. The application delivers HTTP Live Streaming (HLS) video files, which consist of static media segments stored in an Amazon S3 bucket. The company requires a highly resilient architecture that minimizes delivery latency for global viewers and automatically handles S3 origin failures. The solution must minimize operational overhead.

Which TWO actions should a solutions architect take to meet these requirements? (Select TWO.)

An analytics workload runs on Amazon EC2 instances in private subnets. The instances download $30\text{ TB}$ of data monthly from Amazon S3 and write $15\text{ TB}$ of data monthly to an Amazon DynamoDB table in the same Region. Currently, all outbound traffic from the private subnets routes through NAT Gateways, leading to high data processing charges. Which two actions should a solutions architect recommend to reduce network data transfer costs? (Select TWO.)

A software-as-a-service (SaaS) telemetry company is designing a metadata catalog using Amazon DynamoDB. The application has a predictable, continuous baseline workload of $4,000$ write requests per second (each $1\text{ KB}$ in size) and $8,000$ eventually consistent read requests per second (each $1\text{ KB}$ in size) running $24/7$. Twice a week, during scheduled device reporting intervals, write requests surge suddenly to $40,000$ writes/second for a duration of $2\text{ hours}$. The database storage grows by $1.5\text{ TB}$ per month, but $80\%$ of this data is historical telemetry older than $30\text{ days}$ that is only accessed once a year for compliance auditing. To design the most cost-effective database architecture that prevents throttling during write spikes and minimizes storage costs, which TWO actions should the Solutions Architect take? (Select TWO.)

A company hosts a containerized application on AWS. The application consists of a backend transaction processing service hosted on Amazon ECS on AWS Fargate that runs continuously, requiring a steady-state baseline of 8 tasks and scaling up to 20 tasks during peak hours. Additionally, the company runs a daily batch processing job on Amazon EC2 instances to generate reports; this job is fault-tolerant and can be interrupted without affecting the system. The database tier uses an Amazon RDS for PostgreSQL instance that runs continuously 24/7. Which two options should a solutions architect recommend to provide the most cost-effective compute architecture? (Select TWO.)

A financial technology company is building a serverless transaction processing system on AWS. The system must ingest ledger transaction entries, process them in the exact order they are received to ensure ledger integrity, and store the results in a database. The volume of transactions is highly unpredictable, scaling from zero to tens of thousands of requests in seconds. Additionally, the system must run a nightly ledger reconciliation job that aggregates all transactions from the past 24 hours, which typically takes 45 minutes to execute.

To minimize idle costs and maximize operational efficiency, which two architectural components should a solutions architect select? (Select two.)

A company is deploying a machine learning inference application on a fleet of Amazon EC2 instances distributed across three Availability Zones. The instances require concurrent read-write access to a shared repository of model weights and input datasets. The storage solution must be POSIX-compliant, support sub-millisecond read latencies, and scale dynamically to handle peak throughput of up to $6\text{ GB/s}$.

Which combination of storage solutions and configurations will meet these requirements? (Select TWO.)

A game development company is designing the infrastructure for a new multiplayer mobile game on AWS. The application has the following requirements:

* A game API service that experiences highly variable, spiky traffic throughout the day.
* A matchmaking service that must run continuously $24$ hours a day, $7$ days a week on Amazon EC2.
* A nightly batch processing job that processes game telemetry, is non-time-critical, can tolerate interruptions, and produces temporary output files that are deleted within $48$ hours.
* A relational database tier running on Amazon RDS for MySQL.

Which combination of hosting configurations and purchasing strategies is the most cost-effective for this workload?

A company's finance team wants to establish a proactive cost management strategy for its AWS multi-account environment. The strategy must alert the operations team before the monthly AWS spend exceeds the budget, and also identify sudden, irregular cost spikes across services without manual intervention. Which combination of actions should a Solutions Architect recommend to meet these requirements? (Select TWO.)

A digital learning platform distributes high-definition video-on-demand training courses and accompanying presentation slide decks (PDF files) to a global user base. The media content and slides are stored in an Amazon S3 bucket. The videos are streamed using HTTP Live Streaming (HLS). The slide decks are updated daily, and students must have immediate access to the updated versions. The company wants to optimize content delivery latency, reduce load on the S3 origin, and minimize data transfer costs. Which two actions should a solutions architect recommend to meet these requirements?

A logistics enterprise is designing a real-time fleet tracking system that must ingest and process location updates from over $50{}000$ active delivery vehicles. The system expects a write workload of up to $20{}000$ writes per second. Customer dashboards require real-time tracking updates with read latency under $10\text{ ms}$. The database must scale automatically to handle peak traffic during holiday seasons without performance degradation or partition bottlenecks. Which database architecture provides the highest performance and scalability for this application?

A hospitality company manages its central reservation system using an Amazon Aurora MySQL-Compatible Edition database cluster in the us-east-1 Region. To ensure business continuity, the company requires a disaster recovery (DR) solution in the us-west-2 Region. The DR architecture must support a Recovery Point Objective (RPO) of less than $1$ second and a Recovery Time Objective (RTO) of less than $1$ minute. Which database configuration meets these requirements?

A solutions architect is designing a cost-optimized database solution for two workloads. The first workload is a non-relational database with highly unpredictable, spiky traffic. The second workload is a relational database that requires high availability and automatic failover in the event of an infrastructure failure. Which database configurations will meet these requirements in the most cost-effective manner? (Select TWO.)

A software development company uses Amazon S3 to store temporary build artifacts generated by their continuous integration (CI) pipeline. The average size of these artifacts is $450\text{ KB}$. These files are frequently accessed during the first 10 days for verification and testing. The company wants to minimize storage costs and must permanently delete the artifacts exactly 25 days after creation. Which of the following lifecycle configurations is the most cost-effective solution?

A software company runs multiple development workloads on AWS, with all resources tagged by Environment. The company's platform team wants to detect sudden, unexpected spend increases in these environments as quickly as possible. The solution must automatically identify anomalies based on historical spending patterns without requiring the team to define static thresholds, and it must send alerts to an Amazon SNS topic for immediate investigation. Which solution will meet these requirements?