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A fintech startup runs a rules engine on Amazon ECS with AWS Fargate in two AWS accounts (prod and audit) processing up to 3,000 events per minute, and when an event fails validation the container must call a third-party incident REST API that requires retrieving a bearer access token at runtime, and the token must be encrypted at rest and in transit and be accessible to workloads in both accounts with the least management overhead, which solution meets these requirements?
A real-time food delivery platform stores courier GPS pings in an Amazon DynamoDB table, ingesting tens of millions of items per day where each ping is a single item, and the application only needs pings from the most recent 24 hours so any item older than 24 hours should be removed; what is the MOST cost-effective way to delete items older than 24 hours?
A fintech startup is moving a legacy payment ledger to an Amazon Aurora PostgreSQL-Compatible cluster with 1 writer and 2 readers and requires the database credentials to be stored securely and rotated automatically every 30 days without adding any application code or custom rotation logic; which solution best meets these requirements?
A developer is building a serverless application for drivers to reserve electric vehicle (EV) charging connectors at a city network of 12 stations (8 connectors per station). Drivers send reservation requests to an Amazon API Gateway API backed by an AWS Lambda function that acknowledges the request within 300 ms and generates a reservation ID. The application includes two additional Lambda functions: one for allocation management and one for payment processing; these two functions run in parallel and write reservation records to an Amazon DynamoDB table. Concurrent requests for the same connector and 30-minute timeslot can arrive within 10 ms of each other. The application must assign connectors according to the following: if a connector timeslot is accidentally double-reserved, the first reservation request received by the application must get the slot and only that reservation's payment must be processed; however, if the first reservation is rejected during payment (payment response can take up to 30 seconds), the second reservation must get the slot and its payment must be processed. Which solution will meet these requirements?
A mobile gaming company is deploying a leaderboard service and will create an Amazon DynamoDB table using an AWS CloudFormation template; compliance requires server-side encryption at rest with an AWS owned key to avoid any KMS key administration, and the table must launch in us-east-1 with 100 write capacity units and 250 read capacity units. How should the engineer define the table to meet these requirements?
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An IoT analytics team operates 200 edge gateways that send application logs to a single Amazon CloudWatch Logs log group named /prod/gateway via an AWS IoT Core rule. The on-call engineers must receive an email within 60 seconds whenever any log line contains the exact word "FATAL"; the developer has already created an Amazon Simple Notification Service (Amazon SNS) topic and subscribed the on-call email list to it—what should the developer do next to meet the requirement?
A backend team plans to migrate a legacy order service to AWS in 6 weeks, but the mobile app team needs immediate access to stable API endpoints to build and test UI flows for browsing and placing orders. The developer creates a GET method on the /orders resource of an Amazon API Gateway REST API with no backend available yet. The endpoints must return predefined HTTP status codes (200, 404, 429) and static JSON payloads that the mobile team can consume, without deploying any compute service. Which solution will meet these requirements?
A small media startup is releasing a React Native mobile app that runs entirely on client devices with no backend servers, must call a third-party catalog service exposed as an HTTP API by passing the company’s API key in an HTTP header (x-api-key) without exposing the key to users, and expects about 3,000,000 requests per month with payloads under 10 KB; which AWS solution allows the mobile app to call the third-party API securely in the MOST cost-effective way?
A media company has 25 application configuration values (all String type) stored as parameters under the path /prod/img/ in AWS Systems Manager Parameter Store in the us-east-1 Region of a centralized account named Shared-Config. A new image-scaling microservice will run in Amazon ECS in a separate account named Dev-Render and must read these parameters at container startup as environment variables without copying them into Dev-Render. The Dev-Render team wants a read-only, least-privilege solution with the least operational overhead for cross-account access. Which solution meets these requirements?
A developer is running a 50/50 A/B test for a new "smart coupon" feature in an Amazon CloudWatch Evidently project in the staging environment. The feature has two variations (Variation A and Variation B) and requests are evaluated using the userId attribute. The developer needs to ensure that only Variation A is returned when calling the application's GET /v2/coupons endpoint using the test user ID qa-7788. Which solution will meet this requirement?
Período de estudo: 1 month
점수는 793점으로 합격했어요! 하루에 최소 30문제는 풀었어요. 밖에서도 짬 날 때마다 풀 수 있으니 좋네요ㅎㅎ
Período de estudo: 2 months
앱 문제가 시험이랑 굉장히 유사했어요. 그리고 해설들이 왜 틀렸는지 이해하는데 도움이 됐어요.
Período de estudo: 1 month
Thank you very much, these questions are wonderful !!!
Período de estudo: 2 months
1달 전에 합격했는데 지금 후기쓰네요. 시험하고 문제 구성이 비슷했어요
Período de estudo: 2 months
I just passed the exam, and I can confidently say that this app was instrumental in helping me thoroughly review the exam material.
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