AZ-900 Assessment

Which of the following is a key benefit of cloud computing?

• Fixed resources and costs

• High upfront capital expenses

• Scalability and elasticity

• Limited fault tolerance

Answer explanation

Scalability and elasticity are key benefits of cloud computing, allowing resources to be adjusted based on demand. This flexibility contrasts with fixed resources and high upfront costs, making cloud solutions more efficient.

What is the primary difference between OpEx and CapEx in cloud computing?

• OpEx requires high upfront investment, while CapEx is pay-as-you-go.

• OpEx is pay-as-you-go, while CapEx involves upfront investment in infrastructure.

• Both involve similar payment models.

• Neither is applicable to cloud computing.

Answer explanation

The primary difference is that OpEx (Operational Expenditure) is a pay-as-you-go model, allowing flexibility in costs, while CapEx (Capital Expenditure) requires a significant upfront investment in infrastructure.

Which cloud model is best for organizations requiring high control and security of their data?

• Public Cloud

• Private Cloud

• Hybrid Cloud

• SaaS

Answer explanation

The Private Cloud model offers organizations dedicated resources, allowing for greater control and enhanced security of their data compared to Public or Hybrid Clouds, making it the best choice for high security needs.

In the shared responsibility model, what is the customer's primary responsibility?

• Managing hardware and physical security

• Ensuring application-level security

• Operating the underlying network infrastructure

• Maintaining data center facilities

Answer explanation

In the shared responsibility model, customers are primarily responsible for ensuring application-level security, which includes protecting their applications from vulnerabilities and threats, while the provider manages the underlying infrastructure.

Customers are responsible for securing their data, applications, and identities, while providers handle infrastructure. Which service model allows you to rent virtual machines and manage them yourself?

• SaaS

• PaaS

• IaaS

• FaaS

Answer explanation

IaaS (Infrastructure as a Service) allows customers to rent virtual machines and manage them, while the provider handles the underlying infrastructure. This model gives users control over their computing resources.

A company uses Microsoft Office 365 for email and collaboration. Which cloud service model is this?

• IaaS

• PaaS

• SaaS

• Private Cloud

Answer explanation

Microsoft Office 365 is a cloud-based service that provides software applications over the internet, making it a Software as a Service (SaaS) model. Users access applications like email and collaboration tools without managing the underlying infrastructure.

What is a primary advantage of using a hybrid cloud model?

• All workloads are managed on-premises.

• Resources can be scaled dynamically across private and public clouds.

• It eliminates the need for on-premises hardware.

• It locks data in one location for security.

Answer explanation

A primary advantage of using a hybrid cloud model is that resources can be scaled dynamically across private and public clouds, allowing for flexibility and efficient resource management.

A startup plans to test its application by temporarily increasing compute power during peak load testing. Which benefit of cloud computing does this illustrate?

• Scalability

• Elasticity

• High Availability

• Cost Efficiency

Answer explanation

The startup's ability to temporarily increase compute power during peak load testing demonstrates elasticity, which allows resources to scale up or down based on demand, ensuring optimal performance without permanent resource commitment.

An e-commerce company wants to recover quickly from a regional outage by shifting operations to another region. What cloud benefit does this demonstrate?

• Scalability

• Elasticity

• Disaster Recovery

• Agility

Answer explanation

The e-commerce company's ability to quickly shift operations to another region highlights the cloud benefit of Disaster Recovery, as it ensures business continuity during outages.

Public clouds are exclusively used by single organizations.

• True

• False

Answer explanation

Public clouds are shared resources that multiple organizations can use simultaneously. Therefore, the statement that public clouds are exclusively used by single organizations is false.