AZ-900 Describe Azure architecture and services Practice Test 22 — 15 Questions

Question 1

Which Azure service provides real-time monitoring and alerting for web application availability and performance from multiple global locations?

Accepted Answer

Application Insights Availability tests. Application Insights Availability tests (part of Azure Monitor) are specifically designed to monitor the availability and responsiveness of web applications from multiple geographically distributed locations. These tests simulate user requests from global points of presence and provide real-time alerts when an endpoint fails or responds slowly, making them the correct choice for this scenario.

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Azure Traffic Manager health probes

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Azure Monitor Action Groups

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Azure Load Balancer health probes

Question 2

Which Azure compute option lets you run pre-packaged applications from the Azure Marketplace with pre-configured OS and application software?

Accepted Answer

Azure Marketplace VM images. Azure Marketplace VM images (Option B) are pre-configured virtual machine images that include both an operating system and application software, allowing you to deploy pre-packaged solutions quickly. These images are published by Microsoft, third-party vendors, and the community, and they are directly available from the Azure portal for one-click deployment.

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Azure Custom Images from Compute Gallery

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Azure DevTest Labs formulas

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Azure Container Registry base images

Question 3

Which Azure service enables you to stream live events and on-demand video content to global audiences?

Accepted Answer

Azure Media Services. Azure Media Services is the correct choice because it is a PaaS offering specifically designed for encoding, packaging, and streaming both live events and on-demand video content at scale. It supports industry-standard protocols like HLS and MPEG-DASH, and integrates with Azure CDN for global delivery, making it the dedicated service for end-to-end video workflows.

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Azure CDN

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Azure Communication Services

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Azure Video Analyzer for Media

Question 4

Which Azure service provides real-time translation of spoken conversations between participants speaking different languages?

Accepted Answer

Azure Speech Translation. Azure Speech Translation is the correct service because it is specifically designed to provide real-time translation of spoken conversations, enabling multilingual communication by translating speech input into text or synthesized speech in another language. Unlike Azure Translator, which handles text translation, Speech Translation integrates speech recognition and translation to process audio streams directly.

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Azure Translator

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Azure Language Understanding

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Azure Communication Services

Question 5

Which Azure service provides fully managed, distributed in-memory caching for data like session state and frequently accessed database queries?

Accepted Answer

Azure Cache for Redis. Azure Cache for Redis is a fully managed, distributed in-memory caching service based on the open-source Redis engine. It is specifically designed to store session state and cache frequently accessed database queries, providing low-latency data access by keeping data in memory rather than on disk.

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Azure Storage Table

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Azure SQL Database In-Memory OLTP

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Azure CDN edge caching

Question 6

Which Azure service provides code repository hosting with features like pull requests, code review, and branch protection?

Accepted Answer

Azure Repos. Azure Repos is the correct answer because it provides Git-based code repository hosting with full support for pull requests, code review workflows, and branch protection policies. These features enable teams to collaborate on code changes, enforce quality gates, and prevent direct pushes to critical branches.

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Azure Artifacts

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Azure Pipelines

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Azure Boards

Question 7

Which Azure service provides a managed implementation of the gRPC protocol for communication between microservices?

Accepted Answer

Azure API Management with gRPC support. 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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Azure Logic Apps

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Azure Service Bus

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Azure Event Grid

Question 8

Which Azure service provides a flexible, highly available LDAP (Lightweight Directory Access Protocol) and Kerberos service without managing domain controllers?

Accepted Answer

Azure AD Domain Services. Azure AD Domain Services (Azure AD DS) provides managed domain services such as LDAP and Kerberos authentication without the need to deploy, patch, or maintain domain controllers. It automatically synchronizes identities from Azure AD or an on-premises Active Directory, offering a fully managed, highly available service that supports legacy directory-aware applications and lift-and-shift scenarios.

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Azure Active Directory (Azure AD)

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Azure AD B2C

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Azure Active Directory Connect

Question 9

Which Azure service provides the ability to test and debug Azure applications locally that interact with Azure services?

Accepted Answer

Azurite (Azure Storage Emulator) and Azure Cosmos DB Emulator. Azurite and the Azure Cosmos DB Emulator provide local emulation of Azure Blob Storage, Queue Storage, Table Storage, and Cosmos DB, enabling developers to test and debug applications that interact with these Azure services without incurring cloud costs or requiring network connectivity. This allows full offline development and debugging of Azure-dependent code.

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Azure DevTest Labs

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Azure Local Network Gateway

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Azure Cloud Shell local mode

Question 10

Which Azure networking feature allows you to filter outbound internet traffic from Azure VMs using a managed cloud firewall?

Accepted Answer

Azure Firewall. Azure Firewall is a managed, cloud-based network security service that protects your Azure Virtual Network resources. It is a fully stateful firewall as a service with built-in high availability and unrestricted cloud scalability, allowing you to centrally create, enforce, and log application and network connectivity policies across subscriptions and virtual networks. Specifically, it can filter outbound internet traffic from Azure VMs by inspecting traffic at Layers 3-7 of the OSI model, which is precisely what the question asks for.

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Azure DDoS Protection

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Network Security Groups (outbound rules)

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Azure Web Application Firewall

Question 11

Which Azure service provides object storage with a hierarchical namespace optimized for big data and analytics workloads?

Accepted Answer

Azure Data Lake Storage Gen2. Azure Data Lake Storage Gen2 (ADLS Gen2) is the correct answer because it combines Blob Storage’s scalable object storage with a hierarchical namespace, enabling POSIX-like directory structures and fine-grained access control lists (ACLs). This architecture is specifically optimized for big data and analytics workloads, such as those running Apache Spark, Hive, or Azure Databricks, where efficient directory-level operations and high throughput are critical.

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Azure Files

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Azure Blob Storage (flat namespace)

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Azure Queue Storage

Question 12

Which Azure service provides enterprise-grade, distributed message queuing with features like guaranteed delivery and FIFO ordering?

Accepted Answer

Azure Service Bus queues. Azure Service Bus queues are the correct choice because they are designed for enterprise-grade messaging with support for guaranteed delivery (at-least-once or exactly-once semantics) and strict FIFO ordering through sessions. Unlike simpler queue services, Service Bus provides advanced features like dead-lettering, message deferral, and transactional support, making it suitable for mission-critical application integration.

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Azure Queue Storage

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Azure Event Hubs

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Azure Event Grid

Question 13

Which Azure networking service provides a distributed, highly available, and scalable DNS service for routing users to the best-performing endpoint?

Accepted Answer

Azure Traffic Manager. Azure Traffic Manager is a DNS-based traffic load balancer that distributes traffic to the best-performing endpoint across global Azure regions. It uses DNS responses to direct users to the endpoint with the lowest latency or highest priority, providing high availability and scalability without proxying traffic.

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Azure Front Door

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Azure Load Balancer

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Azure Application Gateway

Question 14

Which Azure service provides a managed Kubernetes environment that automatically scales node pools based on application demand?

Accepted Answer

AKS with Cluster Autoscaler. Azure Kubernetes Service (AKS) with Cluster Autoscaler is the correct answer because it specifically provides a managed Kubernetes environment where the Cluster Autoscaler automatically adjusts the number of agent nodes in a node pool based on pending pod resource requests. When pods cannot be scheduled due to insufficient compute resources, the Cluster Autoscaler scales out the node pool; when nodes are underutilized for a configurable period, it scales in. This is the only option that combines a managed Kubernetes control plane with intelligent, demand-driven node pool scaling.

Answer

Azure Container Instances

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Azure App Service with auto-scale

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Azure VM Scale Sets

Question 15

Which Azure database service provides ACID-compliant transactional support with row-level locking, ideal for online retail order processing?

Accepted Answer

Azure SQL Database. Azure SQL Database is a fully managed relational database engine that provides full ACID (Atomicity, Consistency, Isolation, Durability) compliance and supports row-level locking, making it ideal for online transaction processing (OLTP) workloads such as retail order processing. It ensures data integrity and concurrency control, which are critical for handling simultaneous order transactions without conflicts.

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Azure Cosmos DB

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Azure Table Storage

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Azure Blob Storage