AZ-900 Practice Test 16 — 15 Questions

Question 1

Which Azure service provides a managed Apache Kafka-compatible event streaming service for high-throughput data pipelines?

Accepted Answer

Azure Event Hubs. Azure Event Hubs is the correct answer because it provides a fully managed, native Apache Kafka-compatible event streaming platform designed for high-throughput data ingestion and processing. It supports the Kafka protocol (including Kafka Connect and Kafka Streams) without requiring you to run any Kafka clusters, making it ideal for real-time data pipelines and analytics.

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Azure Service Bus

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Azure Queue Storage

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Azure Event Grid

Question 2

A startup expects rapid growth and wants its cloud infrastructure to automatically add or remove compute resources based on real-time demand without manual intervention. Which cloud characteristic does this describe?

Accepted Answer

Elasticity. Elasticity is the cloud characteristic that enables automatic scaling of compute resources up or down in response to real-time demand. This startup's requirement to add or remove resources without manual intervention directly matches the definition of elasticity, which is a core benefit of cloud computing.

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High availability

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Fault tolerance

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Disaster recovery

Question 3

Which cloud model provides the greatest degree of control over the underlying infrastructure?

Accepted Answer

Private cloud. The private cloud model provides the greatest degree of control over the underlying infrastructure because it is dedicated to a single organization, allowing full customization of hardware, virtualization layers, networking, and security configurations. In contrast, public clouds abstract infrastructure management away from the customer, limiting control to the application and data layers only.

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Public cloud

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Hybrid cloud

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Community cloud

Question 4

Which Azure AI service provides the ability to search, query, and extract insights from large document collections using AI?

Accepted Answer

Azure Cognitive Search. Azure Cognitive Search (now part of Azure AI Search) is the correct service because it is specifically designed to index, search, and extract insights from large document collections using built-in AI capabilities like OCR, entity recognition, key phrase extraction, and language detection. It integrates with Azure Cognitive Services to enrich documents during indexing, enabling powerful search and query experiences over unstructured data.

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Azure Cognitive Services Text Analytics

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Azure Form Recognizer

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Azure Machine Learning text classification

Question 5

A startup has unpredictable traffic — sometimes thousands of users, sometimes almost none. Which pricing model best fits their needs?

Accepted Answer

Consumption-based (pay-as-you-go) pricing. Consumption-based (pay-as-you-go) pricing is ideal for unpredictable workloads because it charges only for the resources actually used, with no upfront commitment. This model scales automatically with demand, so the startup pays for compute and storage only when traffic spikes occur, and incurs minimal cost during idle periods. It aligns perfectly with the elastic nature of cloud computing, where resources can be provisioned and deprovisioned dynamically.

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Reserved Instances with a 1-year commitment

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Dedicated Hosts with annual contracts

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Fixed monthly flat-rate pricing

Question 6

Which Azure service provides secure access to Azure virtual machines using an HTML5 browser-based RDP and SSH connection without requiring public IP addresses?

Accepted Answer

Azure Bastion. Azure Bastion is a fully managed PaaS service that provides secure and seamless RDP and SSH connectivity to Azure virtual machines directly through the Azure portal using an HTML5-based browser. It eliminates the need for public IP addresses on the VMs, as the connection is established over TLS within the same virtual network, bypassing exposure to the internet.

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Azure VPN Gateway

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Azure Private Link

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Azure Active Directory Application Proxy

Question 7

What is the difference between the Azure portal and Azure CLI?

Accepted Answer

Azure portal is a web GUI; Azure CLI is a command-line scripting tool. The Azure portal is a web-based graphical user interface (GUI) for managing Azure resources through a browser, while Azure CLI is a cross-platform command-line tool that allows you to script and automate resource management using commands. Both tools can be used for production and development tasks, and they both manage resources—just through different interaction methods.

Answer

Azure portal is for production; Azure CLI is only for development

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Azure portal only works on Windows; Azure CLI works cross-platform

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Azure portal manages resources; Azure CLI only deploys applications

Question 8

A company deploys a critical application on Azure virtual machines. They want to ensure that the VMs are distributed across physically separate datacenters within a single Azure region to protect against a single datacenter failure. Which Azure feature should they use?

Accepted Answer

Availability zones. Availability zones are physically separate datacenters within an Azure region, each with independent power, cooling, and networking. By deploying VMs across multiple zones, the application is protected from a single datacenter failure, as Azure ensures at least one zone remains operational during an outage.

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Availability sets

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Resource groups

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Azure Site Recovery

Question 9

A company wants to increase the number of virtual machines it uses during peak hours and decrease them during off-peak hours without manual intervention. Which characteristic of cloud computing does this represent?

Accepted Answer

Elasticity. Elasticity is the cloud characteristic that allows resources to automatically scale out (increase) during peak demand and scale in (decrease) during off-peak hours without manual intervention. This matches the company's requirement for dynamic, automatic adjustment of virtual machine counts based on workload changes.

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High Availability

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Scalability

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Load Balancing

Question 10

Which Azure service provides a managed Kubernetes environment that reduces the complexity and operational overhead of running Kubernetes?

Accepted Answer

Azure Kubernetes Service. Azure Kubernetes Service (AKS) is the correct answer because it is a managed Kubernetes service that handles critical operational tasks such as health monitoring, patching, and upgrades of the control plane, thereby reducing the complexity and overhead of running Kubernetes. Unlike unmanaged Kubernetes, AKS abstracts the master node management, allowing you to focus on deploying and managing your containerized applications.

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Azure Container Instances

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Azure Container Apps

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Azure App Service

Question 11

A company hosts a web application on Azure App Service. The application must be accessible from any internet-connected device, including smartphones and laptops. Employees also use the Azure portal and Azure CLI from various locations to manage the application and other Azure resources. This scenario best illustrates which characteristic of cloud computing?

Accepted Answer

Broad network access. Broad network access is the correct characteristic because the scenario explicitly describes the web application being accessible from any internet-connected device (smartphones, laptops) and employees managing resources via the Azure portal and CLI from various locations. This aligns with the NIST definition of broad network access, where resources are available over the network and accessed through standard protocols (e.g., HTTPS, SSH) by heterogeneous thin or thick client platforms.

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On-demand self-service

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Resource pooling

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Measured service

Question 12

A company wants to track resource usage across departments and projects. They have multiple Azure subscriptions. They need to assign costs to specific departments based on resource usage. Which Azure feature enables them to view and analyze costs by resource tags?

Accepted Answer

A) Azure Cost Management + Billing. Azure Cost Management + Billing provides the tools to view, analyze, and allocate costs across subscriptions and resources. By enabling tag inheritance and using cost analysis filters, you can group costs by resource tags (e.g., Department or Project) to assign spending to specific departments. This is the correct feature because it directly supports cost tracking and allocation by tags.

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B) Azure Policy

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C) Azure Tags

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D) Azure Resource Groups

Question 13

Which Azure service acts as a central networking hub connecting multiple virtual networks and on-premises networks together?

Accepted Answer

Azure Virtual WAN. Azure Virtual WAN is a networking service that provides a centralized hub-and-spoke architecture, enabling connectivity between multiple virtual networks (VNets) and on-premises networks through a single managed hub. It aggregates VPN, ExpressRoute, and VNet-to-VNet connections, simplifying routing and policy management across hybrid and multi-site environments.

Answer

Azure VNet Peering

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Azure ExpressRoute

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Azure Private Link

Question 14

An IT administrator needs to query all Azure resources across multiple subscriptions to find all virtual machines that were created in the last 30 days. They want to use a powerful query language. Which Azure service should they use?

Accepted Answer

Azure Resource Graph. Azure Resource Graph is the correct service because it provides a powerful, Kusto Query Language (KQL)-based query engine that can efficiently explore and query Azure resources across multiple subscriptions, resource groups, and locations. It is specifically designed for resource discovery and inventory scenarios, such as finding all virtual machines created in the last 30 days, by filtering on properties like `createdTime`.

Answer

Azure Monitor

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Azure Resource Manager

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Azure CLI

Question 15

Which Azure service enables you to create, train, and deploy machine learning models using a visual drag-and-drop interface?

Accepted Answer

Azure Machine Learning. Azure Machine Learning provides a visual drag-and-drop interface called the designer, which allows users to create, train, and deploy machine learning models without writing code. This distinguishes it from other Azure services that focus on pre-built APIs, big data processing, or analytics pipelines.

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Azure Cognitive Services

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Azure Databricks

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Azure Synapse Analytics