- A
Amazon SQS
Why wrong: SQS is a point-to-point queue — a message can be consumed by only one consumer. To deliver the same message to three services simultaneously, each service would need its own queue, requiring three separate publishes. SNS fan-out to multiple SQS queues is the standard pattern.
- B
Amazon SNS
SNS supports the fan-out pattern where a single message published to a topic is delivered to all subscribers simultaneously. The three services can each subscribe to the SNS topic and receive every product update message at the same time.
- C
Amazon Kinesis Data Streams
Why wrong: Kinesis is designed for real-time data streaming and replay of large-volume streams. For simply delivering a notification to multiple services, SNS is the simpler and more appropriate service.
- D
AWS EventBridge
Why wrong: EventBridge can route events to multiple targets and is a valid alternative, but SNS is the classic and most direct AWS service for fan-out pub/sub messaging to multiple simultaneous subscribers.
Quick Answer
Amazon SNS is the correct choice because it is a fully managed pub/sub messaging service designed to fan out a message to multiple subscribers simultaneously. When a company publishes a single message about a new product, SNS automatically delivers that message in parallel to all subscribed endpoints—such as an email notification service, an inventory update service, and an analytics service—ensuring they all receive it at the same time. On the AWS Certified Cloud Practitioner CLF-C02 exam, this scenario tests your understanding of the difference between SNS (push-based, one-to-many) and SQS (pull-based, one-to-one). A common trap is confusing SNS with SQS, but remember: SNS is for broadcasting, SQS is for decoupling. A helpful memory tip is to think of SNS as a “loudspeaker” that announces to everyone at once, while SQS is like a single queue where each message is picked up by one consumer.
CLF-C02 Cloud Technology and Services Practice Question
This CLF-C02 practice question tests your understanding of cloud technology and services. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
A company publishes a message each time a new product is added to its catalogue. Three services need to receive this message simultaneously: an email notification service, an inventory update service, and an analytics service. Which AWS service should the company use to deliver the message to all three services at the same time?
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
Amazon SNS
Amazon SNS is the correct choice because it is a fully managed pub/sub messaging service designed to deliver messages to multiple subscribers simultaneously. When a new product is added, the company can publish a single message to an SNS topic, and SNS will fan out that message to all three subscribed endpoints (email, inventory, and analytics) in parallel, ensuring they receive it at the same time.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Amazon SQS
Why it's wrong here
SQS is a point-to-point queue — a message can be consumed by only one consumer. To deliver the same message to three services simultaneously, each service would need its own queue, requiring three separate publishes. SNS fan-out to multiple SQS queues is the standard pattern.
- ✓
Amazon SNS
Why this is correct
SNS supports the fan-out pattern where a single message published to a topic is delivered to all subscribers simultaneously. The three services can each subscribe to the SNS topic and receive every product update message at the same time.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Amazon Kinesis Data Streams
Why it's wrong here
Kinesis is designed for real-time data streaming and replay of large-volume streams. For simply delivering a notification to multiple services, SNS is the simpler and more appropriate service.
- ✗
AWS EventBridge
Why it's wrong here
EventBridge can route events to multiple targets and is a valid alternative, but SNS is the classic and most direct AWS service for fan-out pub/sub messaging to multiple simultaneous subscribers.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse SQS (a queue for one-to-one processing) with SNS (a pub/sub for one-to-many delivery), or they overcomplicate the solution by choosing Kinesis or EventBridge when a simple fan-out pattern is required.
Detailed technical explanation
How to think about this question
Under the hood, SNS uses a topic-based pub/sub model where each topic has an Amazon Resource Name (ARN) and supports multiple subscription protocols (HTTP/S, email, SQS, Lambda, SMS, etc.). When a message is published, SNS immediately attempts delivery to all subscribers using a push mechanism, with built-in retries and dead-letter queues for failed deliveries. A real-world scenario is a retail company that needs to notify an email service for customer alerts, an inventory database via SQS, and a Lambda function for analytics—all triggered by a single product catalog update.
KKey Concepts to Remember
- Read the scenario before looking for a memorised answer.
- Find the constraint that changes the correct option.
- Eliminate answers that are true in general but not in this case.
TExam Day Tips
- Watch for words such as best, first, most likely and least administrative effort.
- Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A cloud solutions architect for a retail company is evaluating services for a new workload. The correct answer here reflects best practice for the specific scenario described — not a general cloud recommendation. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Cloud exam questions reward reading the constraint carefully: the same technology can be right or wrong depending on the use case.
What to study next
Got this wrong? Here's your next step.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
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FAQ
Questions learners often ask
What does this CLF-C02 question test?
Cloud Technology and Services — This question tests Cloud Technology and Services — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Amazon SNS — Amazon SNS is the correct choice because it is a fully managed pub/sub messaging service designed to deliver messages to multiple subscribers simultaneously. When a new product is added, the company can publish a single message to an SNS topic, and SNS will fan out that message to all three subscribed endpoints (email, inventory, and analytics) in parallel, ensuring they receive it at the same time.
What should I do if I get this CLF-C02 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 11, 2026
This CLF-C02 practice question is part of Courseiva's free Amazon Web Services certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the CLF-C02 exam.
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