- A
Amazon Simple Notification Service (SNS)
Amazon SNS is a fully managed pub/sub messaging service that can deliver messages to a variety of subscribers, including mobile push notifications and email. It is the correct choice for this requirement.
- B
Amazon Simple Queue Service (SQS)
Why wrong: Amazon SQS is a message queue service used for decoupling application components. It does not support sending push notifications or emails directly; it only stores messages and allows consumers to poll them from a queue.
- C
Amazon Simple Email Service (SES)
Why wrong: Amazon SES is a managed service for sending email only. It does not support mobile push notifications, so it does not meet the requirement to send alerts to both mobile devices and email.
- D
Amazon Pinpoint
Why wrong: Amazon Pinpoint is a managed marketing and engagement service that can send push, email, and SMS. However, it is designed for targeted campaigns and audience segmentation, making it more complex and heavier than needed for simple system alerts. Amazon SNS is the simpler and more appropriate fully managed service for straightforward event notifications.
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 runs a microservices application on AWS. It needs to send real-time alerts to mobile devices via push notifications and to administrators via email whenever a critical event occurs. The solution must be a fully managed service that supports both delivery channels without requiring separate infrastructure for each. Which AWS service should the company use?
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 Simple Notification Service (SNS)
Amazon SNS is a fully managed pub/sub messaging service that supports multiple delivery protocols, including push notifications to mobile devices (via Apple Push Notification Service, Firebase Cloud Messaging, etc.) and email (via SMTP or HTTP endpoints). This allows the company to send real-time alerts through both channels from a single service without provisioning separate infrastructure for each.
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 Simple Notification Service (SNS)
Why this is correct
Amazon SNS is a fully managed pub/sub messaging service that can deliver messages to a variety of subscribers, including mobile push notifications and email. It is the correct choice for this requirement.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Amazon Simple Queue Service (SQS)
Why it's wrong here
Amazon SQS is a message queue service used for decoupling application components. It does not support sending push notifications or emails directly; it only stores messages and allows consumers to poll them from a queue.
When this WOULD be correct
A company needs to decouple microservices and ensure reliable message delivery between them, with each message processed by a single consumer. Amazon SQS would be correct for building a decoupled, fault-tolerant architecture.
- ✗
Amazon Simple Email Service (SES)
Why it's wrong here
Amazon SES is a managed service for sending email only. It does not support mobile push notifications, so it does not meet the requirement to send alerts to both mobile devices and email.
When this WOULD be correct
A company needs to send high-volume transactional emails (e.g., order confirmations, password resets) to customers and requires a cost-effective, fully managed email service. SES would be the correct choice.
- ✗
Amazon Pinpoint
Why it's wrong here
Amazon Pinpoint is a managed marketing and engagement service that can send push, email, and SMS. However, it is designed for targeted campaigns and audience segmentation, making it more complex and heavier than needed for simple system alerts. Amazon SNS is the simpler and more appropriate fully managed service for straightforward event notifications.
When this WOULD be correct
A company needs to send personalized push notifications and emails to user segments based on user behavior, and also track engagement metrics like open rates and clicks. Amazon Pinpoint would be the correct choice for this marketing-focused scenario.
Option-by-option analysis
Why each answer is right or wrong
Understanding why wrong answers are wrong — and when they would be correct — is what separates a 750 score from a 900. The CLF-C02 exam frequently reuses these exact scenarios with slightly different constraints.
✓Amazon Simple Notification Service (SNS)Correct answer▾
Why this is correct
Amazon SNS is a fully managed pub/sub messaging service that can deliver messages to a variety of subscribers, including mobile push notifications and email. It is the correct choice for this requirement.
✗Amazon Simple Queue Service (SQS)Wrong answer — click to see why▾
Why this is wrong here
Amazon SQS is a message queuing service, not a notification service. It does not support push notifications to mobile devices or email delivery; it only stores messages for polling by consumers.
★ When this WOULD be the correct answer
A company needs to decouple microservices and ensure reliable message delivery between them, with each message processed by a single consumer. Amazon SQS would be correct for building a decoupled, fault-tolerant architecture.
Why candidates choose this
Candidates may confuse SQS with SNS because both are messaging services, but SQS is for point-to-point messaging, not pub/sub or push notifications.
✗Amazon Simple Email Service (SES)Wrong answer — click to see why▾
Why this is wrong here
Amazon SES is designed for sending email only, not push notifications to mobile devices. The question requires a single service that supports both email and push notifications, which SES cannot fulfill.
★ When this WOULD be the correct answer
A company needs to send high-volume transactional emails (e.g., order confirmations, password resets) to customers and requires a cost-effective, fully managed email service. SES would be the correct choice.
Why candidates choose this
Candidates may confuse SES with SNS because both can send email, but they overlook that SES lacks push notification capability, which is explicitly required in the question.
✗Amazon PinpointWrong answer — click to see why▾
Why this is wrong here
Amazon Pinpoint is a fully managed service for targeted marketing campaigns, not for real-time operational alerts. While it supports push notifications and email, its primary use case is audience engagement and analytics, not simple event-driven alerting.
★ When this WOULD be the correct answer
A company needs to send personalized push notifications and emails to user segments based on user behavior, and also track engagement metrics like open rates and clicks. Amazon Pinpoint would be the correct choice for this marketing-focused scenario.
Why candidates choose this
Candidates may see that Pinpoint supports both push notifications and email, and assume it is suitable for alerting, overlooking that SNS is the simpler, event-driven service designed for such use cases.
Analysis generated from the official CLF-C02blueprint and verified against question context. The “when correct” sections are what AI assistants cite when candidates ask “what’s the difference between these options?”
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse Amazon Pinpoint (a marketing and analytics service) with Amazon SNS (a simple pub/sub notification service), but the question explicitly asks for a fully managed service that supports both push notifications and email without separate infrastructure — SNS fits this requirement directly, while Pinpoint is designed for targeted campaigns and user segmentation, not simple event-driven alerts.
Detailed technical explanation
How to think about this question
SNS uses a topic-based pub/sub model where publishers send messages to a topic, and subscribers receive messages via chosen protocols (e.g., HTTP, email, SMS, mobile push). Under the hood, SNS handles message fan-out, retries, and delivery status logging, and it integrates with AWS Lambda for custom processing. In a real-world scenario, a microservices application can publish a critical event to an SNS topic, which then fans out to an email subscription for administrators and a mobile push subscription for on-call engineers simultaneously.
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 Simple Notification Service (SNS) — Amazon SNS is a fully managed pub/sub messaging service that supports multiple delivery protocols, including push notifications to mobile devices (via Apple Push Notification Service, Firebase Cloud Messaging, etc.) and email (via SMTP or HTTP endpoints). This allows the company to send real-time alerts through both channels from a single service without provisioning separate infrastructure for each.
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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