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AWS Application Integration and Messaging Flashcards

7 cards from real AWS practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 7 AWS Application Integration and Messaging flashcards as text

  1. A company needs to process messages in strict FIFO order and ensure each message is processed exactly once. Which SQS queue type should they use?

    Answer: FIFO Queue

    SQS FIFO queues guarantee first-in-first-out ordering and exactly-once processing, unlike Standard queues which offer best-effort ordering.

  2. Which Amazon EventBridge feature allows you to replay archived events to a target to debug or reprocess historical data?

    Answer: Event Replay

    EventBridge Event Replay allows you to replay archived events from a specific time window to an event bus, enabling reprocessing and debugging.

  3. An application publishes messages to an SNS topic. Some subscribers need messages delivered immediately, while others need batch processing. What is the best architecture?

    Answer: Fan out from SNS to both Lambda and SQS subscribers

    SNS fan-out allows a single topic to deliver to Lambda for immediate processing and SQS for buffered batch processing simultaneously.

  4. What is the maximum retention period for messages in an Amazon SQS queue?

    Answer: 14 days

    Amazon SQS retains messages for a configurable period between 1 minute and 14 days, with the default being 4 days.

  5. A developer wants to delay the delivery of new messages to an SQS queue by 90 seconds to allow backend systems to prepare. Which feature enables this?

    Answer: Delivery Delay

    SQS Delivery Delay (queue-level) or message-level delay timers postpone when a message first becomes visible to consumers by up to 15 minutes.

  6. Which AWS service should you use to coordinate multiple AWS services into serverless workflows with branching logic and error handling?

    Answer: AWS Step Functions

    AWS Step Functions provides a visual workflow service to coordinate distributed applications using state machines with built-in branching, parallel execution, and error handling.

  7. An Amazon SQS message fails processing repeatedly and is moved to a dead-letter queue. What is the attribute that controls how many times a message can be received before this happens?

    Answer: MaxReceiveCount

    MaxReceiveCount in the SQS redrive policy defines the number of times a message can be received before being sent to the dead-letter queue.