Integration services

15 timed scenario questions (~24 min, ~96 sec each). Reinforces night-28-integration-services.md and gsa-integration-map.md. Answer without peeking at night-28-quiz-answers.json first.

1. 1.A stats-uploader fleet processes Iceland pipeline completions. Producers burst after monthly batch runs; workers must absorb spikes and poll at their own pace with at-least-once delivery. Order between months does not matter. Which service is the best buffer?

   A.Amazon SNS topic with one email subscription per workerB.Amazon EventBridge custom bus with no targets attached yetC.Amazon SQS standard queue between producer and worker tierD.AWS Step Functions Express workflow invoked synchronously from each producer

2. 2.A mobile ski-resort app needs GraphQL queries and live WebSocket subscriptions when lift status changes — minimal custom WebSocket infrastructure. Which AWS service is purpose-built?

   A.Amazon API Gateway REST API with Lambda proxy integration onlyB.AWS AppSync with GraphQL resolvers and subscription fieldsC.Amazon SQS FIFO queue polled every second by the mobile clientD.Amazon EventBridge Scheduler with HTTPS targets to each device token

3. 3.A gaming company ingests millions of click events per hour. Multiple teams run independent real-time aggregators and need replay from a 24-hour retention window. Which ingestion service fits?

   A.Amazon Kinesis Data Streams with custom consumers or Lambda event source mappingsB.Amazon Kinesis Data Firehose delivering batched compressed objects to S3 onlyC.Amazon SQS standard queue with long polling from twenty independent Lambda functionsD.Amazon SNS FIFO topic fanning out to one Lambda subscriber per game shard

4. 4.Security logs must stream from producers to an S3 data lake for Athena queries. You want AWS to handle batching, compression, and scaling without writing consumer application code. Which service?

   A.Amazon Kinesis Data Streams with a custom KCL consumer application writing to S3B.Amazon MSK with Kafka Connect connectors configured manually for each Availability ZoneC.Amazon EventBridge rules targeting S3 PutObject API calls on every individual log lineD.Amazon Kinesis Data Firehose with an S3 destination and optional Lambda transform

5. 5.Global Ski Atlas runs the Iceland OSM pipeline on the 1st of each month as a one-shot Fargate task in private subnets — no HTTP trigger. Which integration pattern from Night 12 is correct?

   A.SQS delay queue that auto-launches ECS when message retention expiresB.EventBridge schedule rule with ecs:RunTask target and dedicated IAM roleC.SNS topic publish on a rate(30 days) EventBridge rule without ECS targetD.Step Functions Express state machine polling ecs:DescribeTasks in a loop

6. 6.Night 32 will orchestrate Iceland RunTask, wait for completion, enqueue stats work, invoke Lambda, and route failures to SNS with different retry policies per step. Which workflow service is the best fit?

   A.Amazon SNS alone — chain subscriptions so each step triggers the nextB.Amazon EventBridge default bus with five identical schedule expressionsC.AWS Step Functions Standard state machine with Retry and Catch statesD.Amazon SQS FIFO queue with message group IDs representing workflow steps

7. 7.Iceland exits with code 1 after an S3 permission error. Ops wants email and a ticketing SQS inbox notified from the same failure signal without each channel polling one shared work queue. What fits?

   A.Amazon SNS topic with email and SQS subscriptions — Night 14 fan-out patternB.Single SQS standard queue — all channels call ReceiveMessage on the same URLC.Amazon Kinesis Data Firehose with SNS as the only supported destinationD.AWS AppSync mutation that writes failure records to DynamoDB streams only

8. 8.A payment processor runs millions of short orchestrations per day. Each flow completes in under two minutes and does not require durable execution history for audit. Cost and throughput matter most. Which Step Functions type?

   A.Standard workflows — full execution history retained up to one year for every runB.AWS Batch job queue with Spot compute replacing Step Functions for every payment flowC.Amazon EventBridge Pipes connecting each payment step without a state machine definitionD.Express workflows — high volume, short duration, optional discard of execution history

9. 9.You want SQS messages when Iceland tasks stop successfully without modifying the container image. Night 13 uses ECS Task State Change events. Which producer pattern is correct?

   A.CloudWatch Logs subscription filter on the container stdout stream onlyB.EventBridge rule matching STOPPED + exitCode 0 targeting the completion queueC.SNS topic subscribed to the ECS cluster — SNS pushes directly into SQS without policyD.Kinesis Data Streams shard per task — Lambda polls shards for exit codes

10. 10.An e-commerce checkout service publishes order-placed events. Three internal teams each need their own durable queue receiving every order; producers must not know team queue URLs. Best pattern?

    A.One SQS queue shared by all teams competing for the same messagesB.Three Lambda functions round-robin polling one DynamoDB stream shardC.SNS topic with three SQS queue subscriptions — classic fan-outD.EventBridge archive replaying the same event to one queue three times serially

11. 11.CloudWatch alarm saa-study-gsa-iceland-task-failed fires on FailedInvocations for the monthly schedule rule. Invocations metric is zero. What most likely failed?

    A.EventBridge could not invoke ecs:RunTask — IAM, PassRole, or invalid target before a task startedB.The Iceland container exited with code 1 after uploading only partial GeoParquet data to S3C.SQS completion queue visibility timeout was shorter than the Fargate task wall-clock runtimeD.SNS email subscription remained in PendingConfirmation status after the first failure publish

12. 12.An exam scenario describes ingesting video from thousands of IoT cameras for later ML analysis — not batch monthly GeoParquet. Which service is most relevant at awareness level?

    A.Amazon SQS FIFO queues carrying large video chunks as individual message bodiesB.AWS Step Functions Map state iterating S3 objects for offline batch analysis onlyC.Amazon EventBridge Scheduler with a one-off cron expression registered per cameraD.Amazon Kinesis Video Streams for video ingest and time-indexed playback

13. 13.In the Night 32 capstone design, after Iceland ECS succeeds, a Lambda stats uploader should process completions asynchronously with DLQ support. What component sits between ECS success and that Lambda?

    A.Amazon SNS topic only — Lambda subscribes with synchronous invokeB.Amazon SQS completion queue — same decoupling pattern as Night 13C.Amazon Kinesis Data Firehose direct PUT from the ECS task ENID.Amazon API Gateway WebSocket route integrated with the ECS service discovery

14. 14.Multiple AWS accounts send custom application events to a central account. Rules must match detail fields and invoke different Lambda functions without point-to-point coupling. Which service?

    A.Amazon SQS with raw message delivery from each account's IAM user credentialsB.Amazon SNS SMS subscriptions filtered only by message attributes on each publishC.Amazon EventBridge event buses and rules with event patterns and cross-account policiesD.AWS Direct Connect VIF broadcasting application events to on-premises message brokers

15. 15.A stock-trading platform must process orders in strict sequence per symbol with deduplication — duplicates would double-execute trades. Which queue type?

    A.Amazon SQS FIFO queue with content-based deduplication enabledB.Amazon SQS standard queue — highest throughput with best-effort orderingC.Amazon SNS standard topic with Lambda subscribers for each symbolD.Amazon EventBridge default bus with rate(1 second) schedule per symbol