Objective 3.8CLF-C02

3.8 Identify services from other in-scope AWS service categories.

Objective 3.8 sits in Cloud Technology and Services, which carries 34% of the Cloud Practitioner exam. The questions below are original, written from the official objective title above, and each explanation cites the Amazon Web Services (AWS) page it rests on.

Objective title verbatim from the official objectives. Amazon Web Services (AWS) exam page

A worked example

Shown solved, with the whole explanation open: this is what every question here carries.

3-8Cloud Technology and ServicesModerate

A checkout service creates orders faster than the fulfilment worker can handle them, and work is being dropped at peak. Which service absorbs the backlog?

Amazon SQSCorrect · your answerCorrect. The queue stores work until the consumer is ready for it.
Amazon SNSA topic pushes each message to its subscribers immediately, so a slow consumer is still overwhelmed.
AWS Step FunctionsStep Functions coordinates the order of steps in a workflow. It is not a buffer for a rate mismatch.
Amazon EventBridgeEventBridge routes events to targets by rule, which is a distribution problem rather than a backlog one.

Correct.

Concept

Two components that call each other directly must run at the same speed. Putting durable storage between them lets the producer finish while the consumer works through the backlog at its own rate.

Why A

A hosted queue holds each message durably until a consumer takes it, which decouples the two components. The fulfilment worker then drains the backlog after the peak instead of losing requests during it.

Source

#sqs#decoupling#messaging

Now you: objective 3.8 questions

No account needed. The explanation opens when you answer.

Sample question 1 of 3

3-8Cloud Technology and ServicesEasy

A team needs one order event to reach an email address, a Lambda function and an SQS queue at the same time. Which service does that?

Sample question 2 of 3

3-8Cloud Technology and ServicesModerate

A team must run six Lambda functions in a defined order, retry failures, and see where an execution stopped. Which service coordinates that?

Sample question 3 of 3

3-8Cloud Technology and ServicesHard

A payment pipeline cannot tolerate the same message being processed twice. Which Amazon SQS queue type fits?

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Read the sources

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