Microsoft Microsoft Azure Fundamentals Blog

Deep Dive 8 min read

Azure IoT Hub: Connecting Devices to the Cloud (AZ-900)

Azure IoT Hub is a managed cloud service that enables secure, bidirectional communication between millions of IoT devices and the Azure cloud. It provides a central gateway for device management, state tracking via device twins, and scalable message routing, making it essential for large-scale industrial and consumer IoT deployments.

Cert Sensei Team · 2030-02-15

Deep Dive 8 min read

Azure AI Services Guide for AZ-900 Students

Azure AI services provide a suite of pre-built, API-based tools—including Azure Cognitive Services and Azure Bot Service—that allow developers to integrate vision, speech, language, and decision-making capabilities into applications without requiring deep data science expertise, making them a core component of the AZ-900 exam objectives.

Cert Sensei Team · 2030-02-07

Study Guide 7 min read

Azure Virtual Network Concepts: AZ-900 Study Guide

An Azure Virtual Network (VNet) is a fundamental building block for your private network in Azure. It enables Azure resources, like VMs, to securely communicate with each other, the internet, and on-premises networks. Key concepts for the AZ-900 include subnetting for organization, VNet peering for connectivity, and Network Security Groups for isolation.

Cert Sensei Team · 2030-01-30

Deep Dive 8 min read

Microsoft Defender for Cloud: AZ-900 Security Guide

Microsoft Defender for Cloud is a Cloud Security Posture Management (CSPM) and Cloud Workload Protection (CWP) tool. It helps you secure your Azure resources by providing a Secure Score, identifying misconfigurations, and monitoring regulatory compliance, ensuring your cloud environment remains resilient against threats through continuous monitoring and automated remediation.

Cert Sensei Team · 2030-01-22

Deep Dive 8 min read

Azure Files Guide: Master Managed File Shares for AZ-900

Azure Files provides fully managed file shares in the cloud that are accessible via the industry-standard Server Message Block (SMB) and Network File System (NFS) protocols. It allows organizations to lift-and-shift legacy applications to the cloud without changing code, offering a scalable, serverless alternative to traditional on-premises file servers.

Cert Sensei Team · 2030-01-14

Comparison 8 min read

Azure SQL vs Cosmos DB: Which One Should You Choose?

Azure SQL is a relational database best for structured data, complex queries, and ACID compliance using vertical scaling. Cosmos DB is a globally distributed NoSQL database ideal for unstructured data, low-latency requirements, and massive scale via horizontal partitioning. Choose Azure SQL for consistency and Cosmos DB for flexibility and global reach.

Cert Sensei Team · 2030-01-06

Study Guide 8 min read

Azure RBAC Guide: Master Permissions for AZ-900

Azure Role-Based Access Control (RBAC) is a system used to manage access to Azure resources. It allows you to assign specific roles to users, groups, or service principals at various scopes—such as subscriptions or resource groups—ensuring users have only the permissions necessary to perform their tasks, following the principle of least privilege.

Cert Sensei Team · 2029-12-29

Comparison 7 min read

Azure Container Instances vs AKS: Which to Use?

Azure Container Instances (ACI) is a serverless offering for quickly launching a single container without managing servers. Azure Kubernetes Service (AKS) is a full orchestration platform for managing complex, multi-container microservices. Choose ACI for simple, short-lived tasks and AKS for scalable, production-grade applications requiring high availability and complex networking.

Cert Sensei Team · 2029-12-21

Deep Dive 8 min read

Azure App Service Guide: Hosting Web Apps for AZ-900

Azure App Service is an HTTP-based service for hosting web applications, REST APIs, and mobile backends. As a Platform-as-a-Service (PaaS), it abstracts infrastructure management, allowing developers to focus on code while providing built-in features for auto-scaling, deployment slots, and support for multiple languages and frameworks.

Cert Sensei Team · 2029-12-13

Deep Dive 8 min read

Azure Machine Learning: Building AI Models for AZ-900

Azure Machine Learning is a cloud-based platform for creating, training, and deploying machine learning models. For the AZ-900 exam, you must understand Automated ML for rapid prototyping, Azure ML Studio for visual design, and the lifecycle of model training, versioning, and deployment to production environments.

Cert Sensei Team · 2029-08-03

Comparison 7 min read

Azure Load Balancer vs Application Gateway: Which to Use?

Azure Load Balancer operates at Layer 4 (TCP/UDP) for high-performance, low-latency traffic distribution. In contrast, Azure Application Gateway operates at Layer 7 (HTTP/HTTPS), offering advanced features like URL-based routing and SSL termination. Choosing between them depends on whether you need simple network-level balancing or intelligent, application-aware traffic management.

Cert Sensei Team · 2029-07-28

Deep Dive 8 min read

What is Azure Sentinel? SIEM and SOAR Explained

Azure Sentinel (now Microsoft Sentinel) is a cloud-native SIEM and SOAR solution. It provides intelligent security analytics by aggregating data across all users, devices, and applications. It uses SIEM for threat detection and SOAR for automated response, allowing security teams to detect, investigate, and respond to threats at scale.

Cert Sensei Team · 2029-07-22

Deep Dive 8 min read

Azure Key Vault: Securing Secrets and Keys for AZ-900

Azure Key Vault is a cloud service for securely storing and managing secrets, cryptographic keys, and certificates. It centralizes secret management, removing sensitive data from source code and providing granular access control through RBAC and access policies, ensuring that only authorized applications and users can access critical credentials.

Cert Sensei Team · 2029-07-16

Deep Dive 8 min read

Azure Disk Storage: HDD vs SSD Guide for AZ-900

Azure Disk Storage offers three main tiers: Standard HDD for backups, Standard SSD for light workloads, and Premium SSD for production environments. For extreme performance, Ultra Disk provides sub-millisecond latency. Choosing the right disk depends on your required IOPS, throughput, and budget, critical concepts for the AZ-900 exam.

Cert Sensei Team · 2029-07-10

Deep Dive 8 min read

Azure SQL Database: Relational Data for AZ-900

Azure SQL Database is a fully managed Platform-as-a-Service (PaaS) relational database based on the Microsoft SQL Server engine. It eliminates infrastructure management by handling patching, backups, and updates automatically, allowing you to focus on application development while ensuring high availability, scalability, and security for your structured data.

Cert Sensei Team · 2029-07-04

Deep Dive 8 min read

Azure Advisor Guide: Optimizing Your Cloud Environment

Azure Advisor is a personalized cloud consultant that analyzes your resource configuration and usage telemetry to provide recommendations. It focuses on five key pillars: cost, security, reliability, operational excellence, and performance, helping AZ-900 candidates and cloud admins optimize their environments for efficiency, security, and maximum cost-savings.

Cert Sensei Team · 2029-06-28

Deep Dive 7 min read

What is Azure Kubernetes Service (AKS)? AZ-900 Guide

Azure Kubernetes Service (AKS) is a managed container orchestration service that simplifies deploying, managing, and scaling Kubernetes clusters on Azure. By handling the complex control plane for free, AKS allows you to focus on your worker nodes and applications, ensuring high availability and scalability for modern, microservices-based cloud architectures.

Cert Sensei Team · 2029-06-22

Deep Dive 7 min read

Azure VM Scale Sets: Scaling Your Infrastructure

Azure VM Scale Sets (VMSS) allow you to deploy and manage a group of identical, load-balanced VMs. They provide automatic scaling based on demand or a defined schedule, ensuring high availability by distributing instances across fault domains, which optimizes performance and cost for variable workloads in the cloud.

Cert Sensei Team · 2029-06-16

Deep Dive 8 min read

Azure Monitor and Log Analytics: A Deep Dive for AZ-900

Azure Monitor is a comprehensive tool for collecting and analyzing telemetry from cloud and on-premises environments. It uses Metrics for real-time numerical performance data and Log Analytics for detailed, queryable event logs. Together, they enable proactive health monitoring, automated alerting, and deep diagnostic insights using the Kusto Query Language (KQL).

Cert Sensei Team · 2027-11-07

Deep Dive 8 min read

Azure NSG: Securing Traffic with Network Security Groups

Azure Network Security Groups (NSGs) are optional layers of security used to filter network traffic to and from Azure resources. By defining inbound and outbound security rules based on source, destination, port, and protocol, NSGs allow you to control access at the subnet or network interface level, ensuring only authorized traffic enters your environment.

Cert Sensei Team · 2027-10-30

Deep Dive 8 min read

Azure Policy and Blueprints: Governance Explained

Azure Policy enforces organizational standards and assesses compliance at scale, while Azure Blueprints orchestrate the deployment of entire environments by packaging policies, RBAC assignments, and ARM templates. Together, they ensure your Azure landing zones are secure, compliant, and repeatable across multiple subscriptions and management groups.

Cert Sensei Team · 2027-10-22

Comparison 7 min read

IaaS vs PaaS vs SaaS on Azure: Key Differences

IaaS, PaaS, and SaaS on Azure differ by the level of management you handle versus Microsoft. IaaS provides maximum control via virtual machines; PaaS streamlines development through platforms like App Services; and SaaS delivers ready-to-use software like Microsoft 365. The key differentiator is the Shared Responsibility Model.

Cert Sensei Team · 2027-10-14

Deep Dive 8 min read

Azure Cosmos DB Guide: Mastering NoSQL for AZ-900

Azure Cosmos DB is a globally distributed, multi-model NoSQL database service provided by Microsoft Azure. It supports multiple APIs—including Document, Key-Value, and Graph—and offers tunable consistency levels and guaranteed low latency. It uses Request Units (RUs) to manage throughput and scale globally across multiple Azure regions.

Cert Sensei Team · 2027-08-25

Study Guide 8 min read

Azure Regions and Availability Zones: AZ-900 Study Guide

Azure regions are geographical areas containing one or more datacenters, while availability zones are physically separate locations within a region. Region pairs provide disaster recovery by pairing regions hundreds of miles apart. Together, they ensure high availability and fault tolerance, critical concepts for passing the AZ-900 Microsoft Azure Fundamentals exam.

Cert Sensei Team · 2027-08-19

Deep Dive 8 min read

Azure Functions Serverless: A Deep Dive for AZ-900

Azure Functions is a serverless compute service that allows you to run event-triggered code without managing infrastructure. It uses an event-driven architecture where triggers initiate execution and bindings connect to other Azure services, automatically scaling resources up or down based on demand to optimize costs and performance.

Cert Sensei Team · 2027-08-13

Comparison 7 min read

Azure VPN Gateway vs ExpressRoute: Which to Use?

Choose Azure VPN Gateway for quick deployment, lower costs, and smaller workloads using the public internet. Opt for ExpressRoute for enterprise-grade reliability, consistent low latency, and higher bandwidth via a private, dedicated connection that bypasses the public internet entirely, ensuring maximum security and predictable performance for mission-critical data.

Cert Sensei Team · 2027-08-07

Exam Tips 8 min read

AZ-900 Study Guide: Core Concepts and Practice Tips

To pass the AZ-900 exam, focus on cloud concepts, Azure architecture, and governance. Success requires understanding IaaS, PaaS, and SaaS, along with core Azure services. Combining official documentation with a high-quality AZ-900 practice exam is the most effective way to identify knowledge gaps and build the confidence needed to pass on your first attempt.

Cert Sensei Team · 2026-09-03

Comparison 7 min read

Azure 900 Redundancy: LRS vs ZRS vs GRS Explained

Azure redundancy options ensure data availability by replicating data across different scopes. Locally Redundant Storage (LRS) replicates thrice in one data center; Zone-Redundant Storage (ZRS) spreads data across three availability zones; Geo-Redundant Storage (GRS) copies data to a secondary region; and Geo-Zone-Redundant Storage (GZRS) combines both ZRS and GRS for maximum resilience.

Cert Sensei Team · 2026-09-03

Deep Dive 7 min read

Which Attacks Does Azure DDoS Protection Mitigate?

Azure DDoS Protection specifically mitigates volumetric attacks (like UDP floods), protocol attacks (like SYN floods), and some application-layer resource attacks. It uses adaptive tuning and monitoring to protect Azure resources by filtering malicious traffic before it reaches your virtual network, ensuring high availability for your cloud services.

Cert Sensei Team · 2026-09-03

Deep Dive 8 min read

What is Microsoft Entra ID? An AZ-900 Study Guide

Microsoft Entra ID, formerly Azure Active Directory, is a cloud-based identity and access management (IAM) service. In the AZ-900 exam, it is presented as the primary tool for managing user identities, securing access via MFA and Conditional Access, and providing Single Sign-On (SSO) across cloud and on-premises applications.

Cert Sensei Team · 2026-09-03

Comparison 7 min read

Azure Data Lake vs Blob Storage: AZ-900 Explained

Azure Blob Storage is object storage for unstructured data using a flat namespace. Azure Data Lake Storage Gen2 builds on Blob storage by adding a hierarchical namespace, making it optimized for big data analytics and high-performance Hadoop workloads. For AZ-900, choose Data Lake when you see "hierarchical" or "analytics."

Cert Sensei Team · 2026-08-10

Comparison 7 min read

Azure Data Lake vs Blob Storage: AZ-900 Guide

Azure Blob Storage is an object store for unstructured data using a flat namespace, ideal for images and backups. Azure Data Lake Storage Gen2 builds on Blob storage by adding a hierarchical namespace, making it optimized for big data analytics and high-performance Hadoop workloads, which is a key distinction for the AZ-900 exam.

Cert Sensei Team · 2026-08-10

Deep Dive 8 min read

What is an Azure Resource Group? AZ-900 Governance Guide

An Azure Resource Group is a logical container that holds related resources for an Azure solution. It enables efficient lifecycle management, allowing you to deploy, update, and delete a group of resources as a single unit, while providing a centralized point for applying governance, security policies, and Role-Based Access Control (RBAC).

Cert Sensei Team · 2026-06-23

Study Guide 10 min read

Azure Fundamentals (AZ-900): How to Pass on Your First Try

To pass the Azure AZ-900 exam, focus on the three core domains: Cloud Concepts, Azure Architecture, and Management and Governance. Combine Microsoft Learn's free modules with high-volume practice exams—like the 1,000 questions at Cert Sensei—to master service distinctions and governance tools. Aim for a 700/1000 score across 40-60 questions.

Cert Sensei Team · 2026-06-07

Study Guide 8 min read

Azure Fundamentals (AZ-900): How to Pass on Your First Try

To pass the Azure AZ-900 exam, focus on the three core domains: Cloud Concepts, Azure Architecture/Services, and Management/Governance. Combine Microsoft Learn's free modules with high-volume practice exams—like the 1,000 expert-curated questions at Cert Sensei—to master service distinctions and governance rules, ensuring you score at least 700/1000.

Cert Sensei Team · 2026-06-07