The answer is Azure API Management, which provides a secure, scalable API gateway that manages access to backend services. This service acts as a centralized facade, handling critical tasks like API publishing, versioning, rate limiting, and authentication—including OAuth 2.0 and JWT validation—while also transforming requests and responses between clients and backend APIs. On the Microsoft Azure Fundamentals AZ-900 exam, this question tests your understanding of integration and security services, often appearing alongside similar services like Azure Front Door or Azure Application Gateway; a common trap is confusing API Management with a simple load balancer, but remember that API Management specifically focuses on API lifecycle management and security policies. For a quick memory tip, think of API Management as the “bouncer and concierge” for your APIs—it controls who gets in and how they behave, while the backend services stay safely behind the scenes.
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.
Which Azure service provides a secure, scalable API gateway that manages access to backend services?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Azure API Management
Azure API Management is the correct service because it provides a secure, scalable API gateway that manages access to backend services. It handles API publishing, versioning, rate limiting, authentication (e.g., OAuth 2.0, JWT validation), and request/response transformation, acting as a centralized facade between clients and backend APIs.
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 Application Gateway
Why it's wrong here
Application Gateway provides layer 7 load balancing for web apps; API Management specifically manages APIs with developer portal features.
✗
Azure Front Door
Why it's wrong here
Front Door provides global load balancing; API Management is the dedicated API lifecycle management and gateway service.
✓
Azure API Management
Why this is correct
API Management provides an API gateway with policies, authentication, rate limiting, developer portal, and analytics.
Related concept
Read the scenario before looking for a memorised answer.
✗
Azure Service Bus
Why it's wrong here
Service Bus provides enterprise messaging; API Management manages HTTP/REST API access.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse Azure API Management with Azure Application Gateway or Azure Front Door because both handle HTTP traffic, but only API Management provides full API lifecycle management, policy enforcement, and developer onboarding features.
Detailed technical explanation
How to think about this question
Under the hood, Azure API Management uses a policy engine that processes each API request through a chain of inbound, backend, and outbound policies (e.g., XML-based policies for IP filtering, rate limiting, or caching). It supports OpenAPI (Swagger) specification import for automatic API documentation generation and can integrate with Azure AD for token validation. In a real-world scenario, a retail company might use API Management to expose inventory and order APIs to third-party partners, applying rate limits per subscription key and transforming responses from XML to JSON without changing backend code.
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 company's IT admin needs to give a contractor read-only access to production logs without sharing account credentials. Using role-based access control (RBAC) and temporary scoped permissions — not a permanent shared password — is the correct pattern. Questions like this test whether you can apply least-privilege access across cloud identity services.
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 API Management — Azure API Management is the correct service because it provides a secure, scalable API gateway that manages access to backend services. It handles API publishing, versioning, rate limiting, authentication (e.g., OAuth 2.0, JWT validation), and request/response transformation, acting as a centralized facade between clients and backend APIs.
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.
About these practice questions
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Variation 1. Which Azure service provides a managed graph API and storage solution for Microsoft 365 data, including users, groups, and calendar events?
medium
A.Azure Cosmos DB for Graph
B.Azure Active Directory Graph API
✓ C.Microsoft Graph
D.Azure API Management
Why C: Microsoft Graph is the correct answer because it provides a unified REST API and managed storage solution that enables access to Microsoft 365 data, including users, groups, calendar events, and other resources. It acts as the single endpoint (https://graph.microsoft.com) for interacting with Microsoft 365 services, replacing older APIs like Azure AD Graph.
Variation 2. Which Azure service provides a managed implementation of the gRPC protocol for communication between microservices?
medium
A.Azure Logic Apps
✓ B.Azure API Management with gRPC support
C.Azure Service Bus
D.Azure Event Grid
Why B: Azure API Management with gRPC support is the correct choice because it provides a fully managed, API gateway-style service that can proxy and manage gRPC calls between microservices. gRPC uses HTTP/2 as its transport protocol and Protocol Buffers for serialization, and Azure API Management can handle this by acting as a reverse proxy for gRPC services, enabling features like authentication, throttling, and monitoring without requiring custom infrastructure.
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Question Discussion
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