AZ-900 Practice Test

Answer choices

1. A. Azure App Service
2. B. Azure Container Instances
3. C. Azure Kubernetes Service
4. D. Virtual Machine Scale Sets

Wrong-answer review

• A. Azure App Service: Azure App Service refers to a managed web app and API hosting service, but this item requires Azure Container Instances because Azure Container Instances allows you to run containers without managing virtual machines, starting them quickly with no upfront commitments and minimal management overhead, making them ideal for short-lived tasks like batch processing.
• C. Azure Kubernetes Service: Azure Kubernetes Service refers to managed Kubernetes for orchestrating containerized applications, but this item requires Azure Container Instances because Azure Container Instances allows you to run containers without managing virtual machines, starting them quickly with no upfront commitments and minimal management overhead, making them ideal for short-lived tasks like batch processing.
• D. Virtual Machine Scale Sets: Virtual Machine Scale Sets refers to groups of virtual machines that scale together, but this item requires Azure Container Instances because Azure Container Instances allows you to run containers without managing virtual machines, starting them quickly with no upfront commitments and minimal management overhead, making them ideal for short-lived tasks like batch processing.

Answer choices

1. A. Elasticity model
2. B. Consumption-based pricing model
3. C. Resource pooling model
4. D. Shared responsibility model

Wrong-answer review

• B. Consumption-based pricing model: Consumption-based pricing model focuses on cost based on usage rather than scaling resources. Elasticity model directly addresses resource scalability, making it more relevant for demand-driven adjustments.
• C. Resource pooling model: Resource pooling model involves sharing infrastructure among multiple users but does not specifically address the ability to scale resources up or down as needed.
• D. Shared responsibility model: Shared responsibility model outlines security and compliance roles between cloud provider and customer but does not relate to scaling resource capacity based on demand.

Answer choices

1. A. Role-Based Access Control
2. B. Conditional Access Policies
3. C. Multifactor Authentication (MFA)
4. D. Single Sign-On (SSO)

Wrong-answer review

• A. Role-Based Access Control: role-based access control refers to permissions assigned through roles at a scope, but this item requires single sign-on because it allows users to access multiple applications and services with one set of login credentials, including those from other identity providers.
• B. Conditional Access Policies: Conditional Access policies refers to rules that allow or block access based on conditions, but this item requires single sign-on because it allows users to access multiple applications and services with one set of login credentials, including those from other identity providers.
• C. Multifactor Authentication (MFA): multifactor authentication refers to requiring more than one verification factor, but this item requires single sign-on because it allows users to access multiple applications and services with one set of login credentials, including those from other identity providers.

Answer choices

1. A. Private Cloud
2. B. Public Cloud
3. C. Multi-Cloud
4. D. Hybrid Cloud

Wrong-answer review

• A. Private Cloud: Private Cloud does not allow integration with Azure while maintaining control over sensitive data, unlike Hybrid Cloud which supports both on-premises and cloud environments.
• B. Public Cloud: Public Cloud lacks the capability to integrate directly with an organization's on-premises infrastructure, whereas Hybrid Cloud enables seamless integration between Azure and existing local resources.
• C. Multi-Cloud: Multi-Cloud refers to using multiple public clouds without integrating them with on-premises infrastructure, while Hybrid Cloud specifically addresses the need for a combined cloud and on-premises solution.

Answer choices

1. A. Region pairs provide a set of datacenters within a single geographic location.
2. B. Region pairs ensure that all resources in one region can be replicated to another region automatically.
3. C. Region pairs designate specific regions as primary and secondary for load balancing.
4. D. Region pairs are used to establish cross-region redundancy for disaster recovery purposes.

Wrong-answer review

• A. Region pairs provide a set of datacenters within a single geographic location.: This statement is incorrect because region pairs are designed to span multiple geographic locations, not be confined within a single location. Region pairs establish cross-region redundancy for disaster recovery purposes.
• B. Region pairs ensure that all resources in one region can be replicated to another region automatically.: Replication between regions is possible but does not occur automatically through region pairs alone. The primary purpose of region pairs is to ensure cross-region redundancy and disaster recovery capabilities, rather than automatic replication.
• C. Region pairs designate specific regions as primary and secondary for load balancing.: Region pairs do not designate specific regions as primary or secondary for load balancing; instead, they are designed to provide redundancy across different geographic locations for disaster recovery.

Answer choices

1. A. PaaS
2. B. IaaS
3. C. On-premises
4. D. SaaS

Wrong-answer review

• A. PaaS: PaaS is incorrect because it involves managing infrastructure such as operating systems and storage, which contradicts the requirement of no management. SaaS provides fully managed applications without any infrastructure oversight.
• B. IaaS: IaaS is incorrect because it requires users to manage virtualized hardware resources like servers, networks, and storage, contrary to the scenario's need for zero infrastructure management. SaaS offers a solution where all aspects are handled by the provider.
• C. On-premises: On-premises is incorrect because it requires local installation and maintenance of software on physical hardware, which contradicts the requirement of not managing any infrastructure. SaaS delivers applications over the internet without needing local setup or oversight.

Answer choices

1. A. Azure Blob Storage
2. B. Azure Table Storage
3. C. Azure Files
4. D. Azure Queue Storage

Wrong-answer review

• A. Azure Blob Storage: Azure Blob Storage refers to object storage for unstructured data, but this item requires Azure Files because it provides fully managed SMB file shares that can be mounted by cloud or on-premises clients, making it the best fit for this question.
• B. Azure Table Storage: Azure Table Storage refers to NoSQL key-value storage for structured entities, but this item requires Azure Files because it provides fully managed SMB file shares that can be mounted by cloud or on-premises clients, making it the best fit for this question.
• D. Azure Queue Storage: Azure Queue Storage refers to message storage for asynchronous communication between components, but this item requires Azure Files because it provides fully managed SMB file shares that can be mounted by cloud or on-premises clients, making it the best fit for this question.

Answer choices

1. A. Elasticity
2. B. Fault tolerance
3. C. Agility
4. D. Scalability

Wrong-answer review

• A. Elasticity: Elasticity refers to the ability of cloud services to automatically adjust resources based on demand, but it does not directly address rapid adaptation to market changes. Agility is more relevant because it focuses on quickly responding and adjusting business processes.
• B. Fault tolerance: Fault tolerance ensures that systems continue to operate despite failures, which is important for reliability but not specifically related to adapting rapidly to changing market conditions. Agility better describes the ability to swiftly respond to new demands or shifts in the market environment.
• D. Scalability: Scalability allows services to handle increases or decreases in load by adding or removing resources, but it does not directly address the need for rapid adaptation to changes in business requirements. Agility is more pertinent because it emphasizes quick response and adjustment.

Answer choices

1. A. Application Gateway
2. B. Azure Firewall
3. C. Virtual Network Gateway
4. D. Azure DNS

Wrong-answer review

• A. Application Gateway: Application Gateway is designed for load balancing and web application firewall features, but it does not offer centralized managed firewall protection across virtual networks. Azure Firewall provides comprehensive network security services that cover broader requirements.
• C. Virtual Network Gateway: Virtual Network Gateway is used for connecting on-premises networks to Azure virtual networks or between Azure virtual networks, but it does not offer centralized firewall management capabilities like Azure Firewall.
• D. Azure DNS: Azure DNS manages public and private DNS zones but does not offer network security features such as those provided by Azure Firewall.

Answer choices

1. A. OpEx, as it offers the flexibility of pay-as-you-go pricing.
2. B. CapEx, because it locks in costs with reserved capacity.
3. C. OpEx, since regular payments are required for ongoing services.
4. D. CapEx, due to its fixed cost pattern regardless of usage.

Wrong-answer review

• B. CapEx, because it locks in costs with reserved capacity.: CapEx, because it locks in costs with reserved capacity. is incorrect because it requires upfront payments and does not offer flexibility based on actual usage.
• C. OpEx, since regular payments are required for ongoing services.: OpEx, since regular payments are required for ongoing services. is misleading as it implies a rigid payment structure without the flexibility of pay-as-you-go pricing.
• D. CapEx, due to its fixed cost pattern regardless of usage.: CapEx, due to its fixed cost pattern regardless of usage. fails because it does not align with avoiding upfront costs and managing expenses based on actual consumption.