The answer is Azure Notification Hubs, the dedicated service for sending push notifications to mobile devices from any backend. This is correct because Notification Hubs acts as a scalable push notification engine that abstracts the complexities of platform-specific services like Apple Push Notification service (APNs) for iOS and Firebase Cloud Messaging (FCM) for Android, allowing a single backend to broadcast messages across all major mobile platforms. On the Microsoft Azure Fundamentals AZ-900 exam, this question tests your understanding of core Azure messaging and integration services, often appearing alongside related services like Event Grid or Service Bus to see if you can distinguish push notification delivery from event routing or message queuing. A common trap is confusing Notification Hubs with Azure Logic Apps, but remember: Logic Apps orchestrates workflows, while Notification Hubs is purpose-built for high-volume, cross-platform push notifications. Memory tip: think "Hub" as the central broadcast tower that sends alerts to any phone, regardless of its operating system.
AZ-900 Describe Azure architecture and services Practice Question
This AZ-900 practice question tests your understanding of describe azure architecture 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 developer wants to send notifications to mobile devices from a backend service. Which Azure service is designed for this purpose?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Azure Notification Hubs
Azure Notification Hubs is a scalable push notification engine that enables sending notifications to any platform (iOS, Android, Windows, etc.) from any backend. It abstracts the complexities of platform-specific notification services (e.g., APNs, FCM, WNS) and provides features like template-based broadcasts, device tagging, and telemetry, making it the correct choice for sending mobile push notifications from a backend service.
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.
✗
Azure Service Bus
Why it's wrong here
Service Bus is an enterprise messaging service for application-to-application communication, not mobile push notifications.
✗
Azure Event Grid
Why it's wrong here
Event Grid routes events between Azure services and applications, not mobile push notifications.
✓
Azure Notification Hubs
Why this is correct
Notification Hubs is specifically designed for sending push notifications to mobile devices across platforms.
Related concept
Read the scenario before looking for a memorised answer.
✗
Azure Queue Storage
Why it's wrong here
Queue Storage provides simple message queuing between application components, not mobile push.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse Azure Service Bus or Event Grid as notification services because they involve message delivery, but neither is designed for push notifications to mobile devices—they are for server-to-server or server-to-service messaging.
Detailed technical explanation
How to think about this question
Under the hood, Azure Notification Hubs maintains a single connection to each Platform Notification System (PNS) like Apple Push Notification service (APNs) or Firebase Cloud Messaging (FCM), handling device registration, token management, and throttling. It supports both tag-based targeting (e.g., send to all devices tagged 'promotions') and template-based notifications, which allow the backend to send a single message that is rendered differently per platform. A real-world scenario is a retail app that sends personalized sale alerts to millions of iOS and Android devices simultaneously, where Notification Hubs handles the fan-out and PNS-specific formatting automatically.
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 media company stores terabytes of video archives that are accessed once a year for audit purposes. Moving these objects to a cold storage tier (Azure Archive, S3 Glacier, or Google Nearline) costs a fraction of hot storage. Questions like this test whether you understand storage tiers, access frequency tradeoffs, and retrieval latency requirements.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this AZ-900 question in full detail.
Describe Azure architecture and services — This question tests Describe Azure architecture and services — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Azure Notification Hubs — Azure Notification Hubs is a scalable push notification engine that enables sending notifications to any platform (iOS, Android, Windows, etc.) from any backend. It abstracts the complexities of platform-specific notification services (e.g., APNs, FCM, WNS) and provides features like template-based broadcasts, device tagging, and telemetry, making it the correct choice for sending mobile push notifications from a backend service.
What should I do if I get this AZ-900 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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Question Discussion
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