Microsoft Azure Fundamentals Blog

Comparison 7 min read

Azure Blob vs File vs Disk: Which Storage Should You Use?

Azure Blob storage is for unstructured data like images; Azure Files provides managed file shares via SMB/NFS for shared access; and Azure Disks provide block-level storage for VMs. Choose Blobs for scalability, Files for shared folders, and Disks for high-performance OS or data drives required by virtual machines.

Cert Sensei Team · 2038-04-22

Study Guide 7 min read

Composite SLAs: Calculating Azure Availability (AZ-900)

To calculate a composite Azure SLA, multiply the individual SLAs of all dependent services expressed as decimals. For example, if two services have 99.9% and 99.9% availability, the composite SLA is 0.999 * 0.999 = 0.998001, or 99.8%. This reflects how dependencies decrease overall system uptime.

Cert Sensei Team · 2038-04-14

Comparison 8 min read

Entra ID Roles vs Azure RBAC: Key Differences Explained

Microsoft Entra ID roles manage identity-level permissions across the entire tenant, such as user management and license assignment. Azure RBAC manages access to Azure resources, like Virtual Machines and Storage Accounts, within specific scopes (Management Groups, Subscriptions, or Resource Groups). Understanding this distinction is critical for passing the AZ-900 exam.

Cert Sensei Team · 2038-04-14

Comparison 7 min read

Azure AI Services vs Machine Learning: Which to Use?

Azure AI services provide pre-built, API-based models for common tasks like vision and speech, ideal for developers seeking fast deployment. Azure Machine Learning is a platform for data scientists to build, train, and deploy custom models from scratch using specific datasets, offering deeper control and higher precision for unique business needs.

Cert Sensei Team · 2038-04-08

Deep Dive 8 min read

Azure Monitor Alerts: Mastering Action Groups for AZ-900

Azure Monitor alerts notify you when specific conditions—based on metrics or logs—are met in your environment. Action Groups define who is notified and what happens next, ranging from simple emails to automated responses via Webhooks or Azure Functions, ensuring critical issues are addressed based on assigned severity levels (Sev0 to Sev4).

Cert Sensei Team · 2038-04-06

Deep Dive 7 min read

Azure Hybrid Benefit: Save Big on Cloud Licensing

Azure Hybrid Benefit allows organizations to use existing on-premises Windows Server and SQL Server licenses with Software Assurance to reduce the cost of running virtual machines in Azure. By paying only the base compute rate instead of the full license fee, businesses can significantly lower their overall cloud spend.

Cert Sensei Team · 2038-04-02

Deep Dive 8 min read

Azure MFA and SSPR: Master Entra ID for AZ-900

Azure MFA (Multi-Factor Authentication) adds layers of security by requiring multiple verification methods, while SSPR (Self-Service Password Reset) allows users to reset passwords without admin help. Together, they harden identity security and drastically reduce helpdesk overhead, forming a core pillar of identity management within Microsoft Entra ID.

Cert Sensei Team · 2038-03-29

Deep Dive 7 min read

Azure Policy Effects: Audit vs Deny vs Append Explained

Azure Policy effects determine how the platform responds when a resource is non-compliant. 'Deny' blocks the creation of non-compliant resources, 'Audit' flags them for review without interrupting deployment, and 'Append' adds missing fields or tags automatically. These effects ensure organizational governance and compliance across your entire Azure subscription.

Cert Sensei Team · 2038-03-27

Deep Dive 8 min read

Azure Hub-and-Spoke Topology: AZ-900 Deep Dive

The Azure hub-and-spoke topology is a network architecture that uses a central VNet (the hub) to connect to multiple isolated VNets (the spokes). This design centralizes shared services like Azure Firewall and VPN gateways, reducing costs and improving security by controlling all traffic flow through a single point of management.

Cert Sensei Team · 2038-03-21

Comparison 7 min read

Azure RA-GRS vs GRS: Read Access Explained

Azure GRS (Geo-Redundant Storage) replicates data to a secondary region for disaster recovery, but the data remains inaccessible unless a failover occurs. RA-GRS (Read-Access Geo-Redundant Storage) provides the same redundancy but allows you to read data from the secondary region at any time, significantly lowering your RTO.

Cert Sensei Team · 2038-03-21

Study Guide 7 min read

Azure VM Sizes: How to Choose the Right VM Series

Choosing the right Azure VM size depends on your workload's primary resource constraint. Use D-Series for general purpose, F-Series for compute-intensive tasks, E-Series for memory-heavy databases, and N-Series for GPU-accelerated workloads. Balancing vCPU and RAM ensures optimal performance while minimizing costs, a key concept for the AZ-900 exam.

Cert Sensei Team · 2038-03-15

Study Guide 8 min read

Azure App Service Plans: Choosing the Right Tier

Azure App Service plans define the compute resources (CPU, RAM) and features available to your web apps. Tiers range from Free and Shared for development to Basic, Standard, and Premium for production, with higher tiers offering auto-scaling, VNet integration, and dedicated compute to ensure high availability and performance.

Cert Sensei Team · 2038-03-13

Comparison 8 min read

Azure SQL Database vs Managed Instance vs SQL on VM

Azure SQL Database is a fully managed PaaS for single databases; Azure SQL Managed Instance provides near-100% compatibility with on-premises SQL Server instance features; and SQL on VM is IaaS, giving you full OS access. Choose based on your need for control versus management overhead.

Cert Sensei Team · 2038-03-09

Study Guide 8 min read

Azure Entra ID: Users, Groups, and Service Principals

Microsoft Entra ID components include users, groups, service principals, and managed identities. Users represent individuals, groups simplify permission management, and service principals allow applications to access resources. Managed identities further secure this by removing the need for developers to manage credentials, ensuring a robust, identity-driven security posture within Azure.

Cert Sensei Team · 2037-09-11

Exam Tips 8 min read

AZ-900 Scenario Guide: Choosing the Right Compute

To choose the right Azure compute service for AZ-900 scenarios, match the workload to the service: use Virtual Machines for legacy apps requiring full OS control, App Service for scalable web apps, Azure Functions for event-driven serverless tasks, and Azure Kubernetes Service (AKS) for complex container orchestration and management.

Cert Sensei Team · 2037-09-03

Deep Dive 8 min read

Azure Resource Manager: The Cloud Control Plane Explained

Azure Resource Manager (ARM) is the deployment and management service for Azure, acting as a consistent control plane. It allows you to create, update, and delete resources using a consistent API, enabling infrastructure-as-code via JSON templates, fine-grained access control through RBAC, and organized resource management using resource groups.

Cert Sensei Team · 2037-08-26

Deep Dive 8 min read

Azure Storage Explorer: Managing Data Efficiently

Azure Storage Explorer is a free, standalone GUI application used to manage Azure Storage accounts. It allows users to perform bulk data transfers and manage Blobs, Files, Queues, and Tables without using the Azure Portal. For AZ-900 candidates, understanding its connectivity options—like SAS tokens and Entra ID—is essential for the exam.

Cert Sensei Team · 2037-08-18

Study Guide 8 min read

Azure Regional Pairs: Disaster Recovery Basics

Azure regional pairs are pairs of regions within the same geography located at least 300 miles apart. This design ensures that if a large-scale disaster affects one region, the paired region remains operational, providing the foundation for high availability and disaster recovery for critical cloud workloads.

Cert Sensei Team · 2037-08-10

Comparison 7 min read

Azure Policy vs RBAC: Which Governance Tool?

Azure RBAC focuses on "who" can perform actions (user permissions), while Azure Policy focuses on "what" those resources can look like (compliance and properties). While RBAC manages access control to prevent unauthorized changes, Azure Policy enforces organizational standards to ensure resources remain compliant across your entire cloud environment.

Cert Sensei Team · 2037-08-02

Deep Dive 7 min read

Azure Cloud Shell: Master CLI and PowerShell for AZ-900

Azure Cloud Shell is a browser-based terminal providing authenticated access to Azure resources. It allows users to choose between Bash and PowerShell environments, requiring an Azure File share for persistent storage. It simplifies management by eliminating local tool installation, enabling rapid deployment via the Azure CLI and Azure PowerShell modules.

Cert Sensei Team · 2037-07-25

Deep Dive 7 min read

Azure Marketplace: Private vs Public Offers Explained

The Azure Marketplace is an online store for third-party software and services. Public offers are available to all users with standard pricing, while private offers allow vendors to provide custom pricing, terms, and conditions to specific customers, streamlining procurement and centralizing billing through a single Azure subscription.

Cert Sensei Team · 2037-06-19

Comparison 7 min read

Azure CAF vs Well-Architected Framework: Key Differences

The Cloud Adoption Framework (CAF) is a high-level strategy for organizational migration and governance, focusing on the "how" of moving to Azure. The Well-Architected Framework (WAF) is a technical set of best practices for optimizing specific workloads across five pillars: reliability, security, cost, operational excellence, and performance.

Cert Sensei Team · 2037-06-13

Comparison 7 min read

Vertical vs Horizontal Scaling: Which One for AZ-900?

Vertical scaling (scaling up) increases the capacity of an existing resource, like adding more RAM or CPU to a single VM. Horizontal scaling (scaling out) adds more instances of a resource, such as adding additional VMs to a pool. Choosing between them depends on your application's architecture and availability requirements.

Cert Sensei Team · 2037-06-07

Study Guide 8 min read

Master the 5 Pillars of Azure Well-Architected Framework

The Azure Well-Architected Framework consists of five pillars: Reliability, Security, Cost Optimization, Operational Excellence, and Performance Efficiency. Together, they provide a structured approach to building cloud solutions that are resilient, secure, cost-effective, and scalable, ensuring your infrastructure meets business requirements while minimizing waste and maximizing uptime.

Cert Sensei Team · 2037-06-01

Comparison 7 min read

Azure Monitor Metrics vs Logs: Which Should You Use?

Azure Monitor metrics are numerical values used for real-time performance monitoring and alerting, while logs are event-based records used for deep forensic analysis and troubleshooting. Use metrics for "how much" or "how fast" and logs for "why" something happened, usually stored in a Log Analytics workspace.

Cert Sensei Team · 2037-05-26

Comparison 7 min read

Azure Tenants vs Subscriptions: AZ-900 Explained

An Azure tenant is a dedicated instance of Microsoft Entra ID representing an organization, while a subscription is a logical container for resources and a billing boundary. One tenant can trust and manage multiple subscriptions, creating a hierarchy that allows organizations to separate environments, budgets, and access controls effectively.

Cert Sensei Team · 2037-05-20

Deep Dive 8 min read

Azure Resource Graph: Querying Your Infrastructure

Azure Resource Graph is an exploration service that allows you to query your Azure resources across multiple subscriptions using Kusto Query Language (KQL). It enables rapid inventory audits and governance reporting by providing a highly performant, read-only view of your resource properties without needing to poll individual APIs.

Cert Sensei Team · 2037-05-14

Deep Dive 8 min read

Azure Logic Apps: No-Code Workflow Automation Guide

Azure Logic Apps is a cloud-based platform that enables you to schedule, automate, and orchestrate tasks, business processes, and workflows. By using a visual designer and pre-built connectors, you can integrate apps, data, and services across Azure and third-party platforms without writing complex code, making it essential for AZ-900 candidates.

Cert Sensei Team · 2036-10-19

Study Guide 8 min read

Mastering Azure SLAs: AZ-900 Study Guide

Azure Service Level Agreements (SLAs) are formal commitments from Microsoft regarding the uptime and availability of their services. They are expressed as a percentage (e.g., 99.9%), defining the minimum expected performance. If Microsoft fails to meet these targets, customers may be eligible for service credits to offset the cost of downtime.

Cert Sensei Team · 2036-10-11

Deep Dive 8 min read

Azure VNet Peering: Connecting Your Networks (AZ-900)

Azure VNet Peering connects two Azure Virtual Networks (VNets) seamlessly, allowing resources in different networks to communicate using private IP addresses. It supports both regional peering within a single region and global peering across different Azure regions, ensuring low latency and high bandwidth by routing traffic over the Microsoft backbone network.

Cert Sensei Team · 2036-10-03

Deep Dive 8 min read

Azure Reserved Instances and Hybrid Benefit Explained

Azure Reserved Instances allow you to save up to 72% on compute costs by committing to a one- or three-year term for predictable workloads. When combined with Azure Hybrid Benefit, which lets you reuse existing on-premises Windows Server and SQL Server licenses, you can achieve the lowest possible pricing for Azure cloud services.

Cert Sensei Team · 2036-09-25

Comparison 8 min read

Azure Backup vs Azure Site Recovery: Which One to Use?

Azure Backup is a data protection service focused on long-term retention and recovering specific files or folders. Azure Site Recovery (ASR) is a disaster recovery service designed for business continuity, enabling the orchestration of failover for entire virtual machines to minimize downtime and data loss during outages.

Cert Sensei Team · 2036-09-17

Comparison 7 min read

Azure Storage Tiers: Hot, Cool, Cold, and Archive

Azure storage tiers—Hot, Cool, Cold, and Archive—optimize costs based on data access frequency. Hot is for active data, Cool for infrequently accessed data (30+ days), Cold for even rarer access (90+ days), and Archive for long-term storage. The trade-off is lower storage costs but higher access fees for colder tiers.

Cert Sensei Team · 2036-09-09

Study Guide 8 min read

Azure Well-Architected Framework: AZ-900 Study Guide

The Azure Well-Architected Framework (WAF) is a set of guiding tenets used to improve the quality of a workload. It consists of five pillars—Reliability, Security, Cost Optimization, Operational Excellence, and Performance Efficiency—providing a structured approach to building secure, scalable, and cost-effective solutions on the Microsoft Azure platform.

Cert Sensei Team · 2036-09-01

Study Guide 7 min read

Azure DevOps for AZ-900: A Practical Study Guide

Azure DevOps for AZ-900 refers to the suite of tools—Boards, Repos, Pipelines, and Artifacts—that enable CI/CD and collaborative software development. For the AZ-900 exam, you must understand how these services automate the software lifecycle and integrate with Azure cloud resources to improve deployment speed and reliability.

Cert Sensei Team · 2036-04-24

Study Guide 8 min read

Azure Resource Hierarchy: Mastering the Structure (AZ-900)

The Azure resource hierarchy is a four-level logical structure consisting of Management Groups, Subscriptions, Resource Groups, and Resources. This hierarchy enables organized governance, where permissions (RBAC) and policies applied at higher levels are inherited by all nested child elements, ensuring consistent security and compliance across an entire cloud environment.

Cert Sensei Team · 2036-04-18

Study Guide 7 min read

Azure Marketplace Guide: Deploying Third-Party Solutions

The Azure Marketplace is an online store providing thousands of certified third-party software applications and services that run on Azure. It accelerates deployment by offering pre-configured VM images, SaaS offerings, and Managed Applications, allowing users to integrate industry-standard tools into their cloud environment without building from scratch.

Cert Sensei Team · 2036-04-12

Comparison 8 min read

Azure SQL: DTU vs vCore Purchasing Models Explained

The DTU model bundles compute, storage, and I/O into a single unit for simplicity, ideal for small, predictable workloads. The vCore model provides independent scaling of compute and storage, offering greater flexibility and control for complex, high-performance applications. Choosing between them depends on your need for simplicity versus granular control.

Cert Sensei Team · 2036-04-06

Comparison 7 min read

Azure Portal vs CLI vs PowerShell: Which Should You Use?

To choose between the Azure Portal, CLI, and PowerShell, consider your goal: use the Portal for visual exploration and rapid prototyping, Azure CLI for cross-platform bash scripting, and Azure PowerShell for deep Windows integration and complex automation. Mastering all three is essential for passing the AZ-900 exam and real-world cloud administration.

Cert Sensei Team · 2036-03-31

Deep Dive 8 min read

Azure Management Groups: Governance at Scale Guide

Azure management groups are containers that help you manage access, policy, and compliance across multiple Azure subscriptions. By organizing subscriptions into a hierarchy, you can apply governance settings at a higher level, ensuring that all nested subscriptions automatically inherit these controls, which simplifies administration for large-scale enterprise environments.

Cert Sensei Team · 2036-03-25

Study Guide 7 min read

Azure Cloud Adoption Framework (CAF) Guide for AZ-900

The Azure Cloud Adoption Framework (CAF) is a collection of documentation, best practices, and tools designed to help organizations align their business and technical strategies for cloud success. It guides users through five key phases—Strategy, Plan, Ready, Adopt, and Govern/Manage—to ensure a scalable, secure, and efficient migration to Azure.

Cert Sensei Team · 2036-03-19

Comparison 7 min read

Azure Scalability vs Elasticity: Key Differences for AZ-900

Azure scalability is the ability to increase resources to handle growing workloads, either vertically (adding power) or horizontally (adding instances). Elasticity is the ability to automatically scale resources up and down in real-time based on demand. While scalability handles growth, elasticity optimizes costs and performance during fluctuating traffic spikes.

Cert Sensei Team · 2033-10-17

Study Guide 8 min read

Azure Service Trust Portal: Compliance and Privacy Guide

The Azure Service Trust Portal is a centralized hub where users access audit reports, compliance certifications, and privacy documentation. It allows organizations to verify Microsoft's adherence to global standards like ISO and SOC, ensuring that Azure environments meet specific regulatory, legal, and security requirements essential for governance and risk management.

Cert Sensei Team · 2033-10-09

Deep Dive 8 min read

Azure Stream Analytics: Real-Time Data Processing Guide

Azure Stream Analytics is a fully managed real-time analytics service that processes high-velocity data streams from sources like IoT Hub. It uses a SQL-like query language to filter, aggregate, and analyze data in motion, allowing you to output immediate insights to destinations like Power BI, Azure SQL Database, or Blob Storage.

Cert Sensei Team · 2033-10-01

Deep Dive 8 min read

Azure DevTest Labs: Rapid Environment Setup Guide

Azure DevTest Labs is a service that allows IT teams to quickly create, manage, and scale self-service environments for development and testing. It optimizes costs through auto-shutdown schedules and prevents resource sprawl via quotas, ensuring developers have consistent, template-based environments without compromising organizational budget or governance.

Cert Sensei Team · 2033-09-23

Exam Tips 7 min read

Azure TCO Calculator: Planning Your Cloud Move

The Azure TCO Calculator is a free tool used to estimate the cost savings of migrating on-premises workloads to Azure. It compares Total Cost of Ownership (TCO) by analyzing hardware, software, and operational expenses, helping AZ-900 candidates and businesses justify cloud migration through detailed cost-benefit analysis.

Cert Sensei Team · 2033-09-15

Deep Dive 8 min read

Azure Databricks Guide: Master Apache Spark on Azure

Azure Databricks is a managed Apache Spark platform optimized for Azure, providing a collaborative environment for data engineers and scientists. It enables large-scale data processing, machine learning, and ETL workflows through integrated notebooks and seamless connectivity with Azure Data Lake Storage, making it essential for big data analytics.

Cert Sensei Team · 2033-09-07

Deep Dive 8 min read

Azure Queue Storage: Master Asynchronous Tasks for AZ-900

Azure Queue Storage is a service for storing large numbers of messages that can be accessed from anywhere. It enables asynchronous communication between application components, allowing you to decouple services and scale high-volume workloads by buffering requests until a processing worker can handle them, ensuring system reliability and performance.

Cert Sensei Team · 2033-08-30

Comparison 8 min read

ARM Templates vs Bicep: Which Azure IaC Should You Use?

Bicep is a domain-specific language (DSL) that acts as a transparent abstraction over ARM templates. While ARM templates use verbose JSON, Bicep offers a concise, readable syntax that simplifies Azure resource deployment. For most users, Bicep is the preferred choice due to better tooling and easier maintenance.

Cert Sensei Team · 2033-08-30

Deep Dive 8 min read

Azure Identity Protection: Securing Microsoft Entra ID

Azure Identity Protection is a tool within Microsoft Entra ID that uses machine learning to detect, investigate, and remediate identity-based risks. By analyzing sign-in and user risk levels, it allows administrators to automate security responses, such as requiring Multi-Factor Authentication (MFA) or password resets, to prevent unauthorized access.

Cert Sensei Team · 2033-08-24

Deep Dive 8 min read

Secure Your VMs with Azure Bastion: AZ-900 Guide

Azure Bastion is a fully managed PaaS service that provides secure RDP and SSH access to virtual machines directly through the Azure portal over SSL (Port 443). By eliminating the need for public IP addresses on your VMs, it significantly reduces the attack surface and protects your virtual network from brute-force attacks.

Cert Sensei Team · 2033-08-22

Deep Dive 8 min read

Azure API Management: The Ultimate Gateway Guide for AZ-900

Azure API Management (APIM) is a hybrid, multi-cloud management platform that provides a unified gateway for backend services. It allows you to publish APIs to external developers, implement security via rate limiting and throttling, and transform requests using policies, ensuring your API ecosystem remains scalable, secure, and easy to discover.

Cert Sensei Team · 2033-08-18

Comparison 8 min read

Azure Stack Hub vs Edge vs HCI: AZ-900 Comparison Guide

Azure Stack is a family of hybrid cloud solutions. Azure Stack Hub provides a disconnected cloud experience; Azure Stack Edge offers localized AI and compute at the edge; and Azure Stack HCI is a hyper-converged infrastructure for virtualized workloads. Choosing the right one depends on your connectivity, latency, and infrastructure needs.

Cert Sensei Team · 2033-08-14

Deep Dive 7 min read

Azure Bicep Guide: Master the Basics for AZ-900

Azure Bicep is a domain-specific language (DSL) that simplifies the creation of Azure Resource Manager (ARM) templates. It provides a more concise, readable syntax than JSON, allowing you to define infrastructure as code (IaC) that automatically compiles into ARM templates for seamless, consistent deployment across Azure environments.

Cert Sensei Team · 2033-08-12

Deep Dive 8 min read

What are ARM Templates? Azure Infrastructure as Code Guide

Azure Resource Manager (ARM) templates are JSON files that allow you to define your Azure infrastructure declaratively. Instead of manually creating resources, you describe the desired final state, and Azure handles the deployment. This ensures consistency, repeatability, and idempotency across development, testing, and production environments.

Cert Sensei Team · 2033-08-06

Study Guide 8 min read

Azure Tags: Organize Your Resources Efficiently (AZ-900)

Azure Tags are name-value pairs assigned to Azure resources to logically organize them into categories for billing, management, and reporting. By assigning tags like 'Environment: Production' or 'CostCenter: 101,' administrators can filter resources in the portal and track spending across different departments or projects efficiently.

Cert Sensei Team · 2033-08-06

Deep Dive 7 min read

Azure Synapse Analytics: Big Data Guide for AZ-900

Azure Synapse Analytics is an integrated analytics service that brings together enterprise data warehousing and Big Data analytics. It allows you to query data using either serverless or dedicated SQL pools and Apache Spark, unifying data ingestion, exploration, and preparation within a single interface called Synapse Studio for streamlined business intelligence.

Cert Sensei Team · 2033-07-31

Deep Dive 8 min read

Azure Service Bus: Enterprise Messaging Explained

Azure Service Bus is a fully managed enterprise message broker that enables decoupling of applications through asynchronous messaging. It provides two primary entities: Queues for one-to-one communication and Topics/Subscriptions for one-to-many distribution, ensuring reliable message delivery, scalability, and fault tolerance in complex cloud architectures.

Cert Sensei Team · 2033-07-25

Comparison 8 min read

Azure Logic Apps vs Functions: Which to Use?

Azure Logic Apps is a low-code visual designer for orchestrating complex workflows and integrating apps via connectors. Azure Functions is a code-first serverless compute service for executing small pieces of logic. Choose Logic Apps for integration and workflow automation, and Functions for complex processing and custom coding requirements.

Cert Sensei Team · 2033-07-19

Deep Dive 8 min read

Azure Arc Explained: Managing Your Hybrid Cloud

Azure Arc is a bridge that extends Azure management and services to any infrastructure, including on-premises data centers and other clouds. It allows you to manage servers, Kubernetes clusters, and data services as if they were native Azure resources, providing a single pane of glass for hybrid cloud governance and security.

Cert Sensei Team · 2033-07-13

Deep Dive 8 min read

Azure AI Search: Mastering Cloud Search for AZ-900

Azure AI Search is a cloud-based search service that enables developers to build rich search experiences over private, heterogeneous content. It provides indexing, full-text search, and AI-powered enrichment using cognitive skills to extract insights from unstructured data, allowing users to query complex datasets efficiently within the Azure ecosystem.

Cert Sensei Team · 2032-01-18

Deep Dive 8 min read

Azure Bot Service: Building Conversational AI for AZ-900

Azure Bot Service is a managed platform for creating intelligent bots that interact with users across various channels. By leveraging the Bot Framework SDK and LUIS for natural language processing, developers can build scalable, conversational AI workflows that automate customer service and integrate seamlessly with tools like Microsoft Teams and Slack.

Cert Sensei Team · 2032-01-10

Deep Dive 8 min read

Azure Table Storage: NoSQL Key-Value Store Guide

Azure Table Storage is a NoSQL key-value store designed for rapid development and massive scalability of unstructured data. It uses a combination of Partition Keys and Row Keys to uniquely identify entities, providing a cost-effective alternative to Cosmos DB for simple, high-volume data storage needs without complex querying requirements.

Cert Sensei Team · 2032-01-02

Comparison 7 min read

Standard vs Premium Storage in Azure: Which to Choose?

Standard Azure Storage uses magnetic hard disk drives (HDDs) for cost-effective, high-capacity storage, while Premium Storage uses solid-state drives (SSDs) for low-latency, high-throughput workloads. Choose Standard for general-purpose data and Premium for performance-critical applications like databases or high-IOPS virtual machine disks to optimize both cost and speed.

Cert Sensei Team · 2031-12-25

Deep Dive 8 min read

Azure Archive Storage: Long-term Data Retention Guide

Azure Archive Storage is a low-cost blob storage tier designed for data that is rarely accessed and can tolerate retrieval latency. It offers the lowest storage costs but higher access costs, requiring a "rehydration" process to move data back to Hot or Cool tiers before it can be read.

Cert Sensei Team · 2031-12-17

Comparison 7 min read

Azure Firewall vs NSG: Which One Should You Use?

Network Security Groups (NSGs) provide basic L3/L4 stateful filtering for individual subnets or NICs, while Azure Firewall is a managed, cloud-native L7 security service. Use NSGs for distributed micro-segmentation and Azure Firewall for centralized, high-scale traffic filtering using FQDNs across multiple virtual networks in a hub-and-spoke architecture.

Cert Sensei Team · 2031-12-09

Comparison 8 min read

Azure Service Health vs Resource Health: Explained

Azure Service Health provides a global view of the health of Azure services across all regions, including planned maintenance and outages. In contrast, Azure Resource Health provides a granular, resource-specific view, telling you if a specific VM or database is down and why, allowing for targeted troubleshooting.

Cert Sensei Team · 2031-12-01

Comparison 7 min read

Public vs Private vs Hybrid Cloud: AZ-900 Comparison

Public cloud offers shared resources and high scalability via providers like Azure. Private cloud provides dedicated hardware for maximum control and security. Hybrid cloud combines both, allowing data and application portability. Choosing the right model depends on your specific needs for cost, compliance, and operational flexibility.

Cert Sensei Team · 2031-11-23

Deep Dive 8 min read

Azure Virtual Desktop (AVD): Cloud VDI Explained

Azure Virtual Desktop (AVD) is a desktop-as-a-service (DaaS) solution that provides a scalable, cloud-based virtual desktop experience. It allows users to access a full Windows experience from any device, leveraging multi-session capabilities to reduce costs and centralized management to simplify deployment across global remote workforces.

Cert Sensei Team · 2031-08-27

Study Guide 8 min read

Zero Trust Azure: AZ-900 Study Guide

Zero Trust Azure is a security framework based on the principle 'Never Trust, Always Verify.' It eliminates implicit trust by requiring explicit verification for every access request, applying least privilege access to minimize risk, and assuming breach to proactively improve detection and response capabilities across the entire cloud environment.

Cert Sensei Team · 2031-08-21

Deep Dive 8 min read

Entra ID Conditional Access: AZ-900 Deep Dive

Entra ID Conditional Access is a tool used to implement "if-then" access control policies. If a specific condition is met—such as a user's location or device state—then a specific action is taken, such as requiring Multi-Factor Authentication (MFA) or blocking access entirely, effectively reducing the organizational attack surface.

Cert Sensei Team · 2031-08-15

Deep Dive 8 min read

Azure Database for MySQL and PostgreSQL: AZ-900 Guide

Azure Database for MySQL and PostgreSQL are fully managed PaaS offerings that eliminate the overhead of hardware provisioning, patching, and backups. They provide high availability, automatic scaling, and seamless integration with Azure services, allowing developers to deploy open-source databases with enterprise-grade security and reliability without managing the underlying infrastructure.

Cert Sensei Team · 2031-08-09

Deep Dive 8 min read

Azure DNS Guide: Managing Domains in the Cloud

Azure DNS is a hosting service for DNS domains that provides name resolution using the global DNS infrastructure. It allows you to host your DNS zones in Azure, manage public and private zones for external and internal traffic, and integrate seamlessly with Azure Virtual Networks to ensure reliable, high-availability resolution.

Cert Sensei Team · 2031-08-03

Comparison 7 min read

Azure Front Door vs Traffic Manager: AZ-900 Guide

Azure Front Door is a Layer 7 load balancer providing HTTP/HTTPS acceleration via Anycast and edge locations, ideal for web apps. Traffic Manager is a DNS-based Layer 3/4 load balancer that directs users to the closest endpoint. Choose Front Door for web performance and Traffic Manager for non-HTTP traffic.

Cert Sensei Team · 2031-07-28

Comparison 7 min read

Azure Private Link vs Service Endpoints: AZ-900 Guide

Azure Service Endpoints provide a secure path to Azure services using the Microsoft backbone network while keeping the service's public IP. Azure Private Link goes further by assigning a private IP address from your VNet to the service, completely removing public internet exposure and offering superior security for sensitive workloads.

Cert Sensei Team · 2031-07-22

Deep Dive 8 min read

Azure Resource Locks: Stop Accidental Deletions (AZ-900)

Azure Resource Locks are management locks applied to resources or resource groups to prevent accidental deletion or modification. The two types are "CanNotDelete" (allows reading and modifying but prevents deletion) and "ReadOnly" (prevents any modifications or deletions). These locks are inherited by all child resources within a resource group.

Cert Sensei Team · 2031-07-16

Study Guide 7 min read

CapEx vs OpEx Azure: Mastering AZ-900 Cloud Economics

CapEx (Capital Expenditure) involves upfront spending on physical infrastructure, like servers, while OpEx (Operational Expenditure) is a recurring cost for services used. In Azure, shifting from CapEx to OpEx allows businesses to pay only for the resources they consume, increasing agility and reducing initial financial risk.

Cert Sensei Team · 2031-07-10

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 8 min read

Azure 900 Redundancy Options: LRS vs ZRS vs GRS

Redundancy options on Azure 900 refer to how Azure Storage replicates data to ensure availability. LRS protects against disk failure; ZRS protects against datacenter outages; GRS protects against regional disasters; and GZRS combines zone and regional redundancy. Choosing the right option balances cost, durability, and availability requirements.

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