AZ-900 Flashcards
What is cloud computing?
delivery of services over the internet
What is a private cloud?
A cloud used by a single entity
What is a public cloud?
a cloud that is built, controlled, and maintained by a third party provider
What is a multi-cloud model?
Where you use multiple public cloud providers
What is the set of technologies that helps to manage your environment called?
Azure Arc
What is CapEx?
Capital Expenditures
What is OpEx?
Operational Expenditures
Which cloud model uses some datacenters focused on providing cloud services to anyone that wants them, and some data centers that are focused on a single customer?
Hybrid Cloud
According to the shared responsibility model, which cloud service type places the most responsibility on the customer?
IaaS
What is vertically scaling in a cloud environment?
Gaining new features
What is horizontal scaling in a cloud environment?
Creating more of what you have deployed
Which type of scaling involves adding or removing resources (such as virtual machines or containers) to meet demand?
Horizontal Scaling
What is characterized as the ability of a system to recover from failures and continue to function?
Reliability
In IaaS, what is the cloud provider responsible for?
physical security, networking, hardware
What more does the cloud provider maintain in PaaS when compared to IaaS?
operating systems, middleware, development tools, and business intelligence services
Which cloud service type is most suited to a lift and shift migration from an on-premises datacenter to a cloud deployment?
IaaS
What type of cloud service type would a Finance and Expense tracking solution typically be in?
SaaS
Can Bash be used to control Azure?
Yes
Can PowerShell be used to control Azure?
Yes
What is Azure CLI interactive mode?
a way to interact with CLI in a way that more resembles an IDE
What is a region?
a geographical area that contains at least one datacenter
What are availability zones?
physically separate datacenters within an Azure region
Does each availability zone have independent cooling, power, and networking?
Yes
What is a resource in Azure?
a basic building block of Azure. Anything you create is a resource
Are all resources required to be in a resource group?
Yes
How many resource groups can a resource be a part of?
1
What is an Azure subscription?
a unit of management, billing, and scale
Must every Azure account have a subscription?
Yes
Can an account have multiple subscriptions?
Yes
What are the two types of subscription boundaries?
Billing boundary and access control boundary
What are resource groups grouped under?
subscriptions
What can manage subscriptions?
Management groups
What happens to the resources within a resource group when an action or setting at the Resource Group level is applied?
The setting is applied to current and future resources
What Azure feature replicates resources across regions that are at least 300 miles away from each other?
Region Pairs
Are VM’s IaaS, PaaS, or SaaS?
IaaS
What are VM scale sets?
Allows you to create and manage a group of identical load balanced VM’s
What are VM availability sets?
allows you to build a more resilient, highly available environment by staggering updates and having different power and network sources
What are the two domains in an availability set
Update domain and fault domain
What is Azure Virtual Desktop?
A type of virtual machine that is a desktop and application virtualization service
What should you use if you want to run multiple instances of an application on a single host machine?
Containers
What are containers?
A virtualization enviroment
What is Azure’s container orchestration service?
Axure Kubernetes Service
What is Azure’s container service that has load balancing and scaling?
Azure Container Apps
What is Azure functions?
an event driven, serverless compute option that doesn’t require maintaining virtual machines or containers
What does it mean for a Function to be stateless?
Every time it is triggered, it acts as if it is restarted
What does it mean for a Function to be stateful?
Durable functions track prior activity
What is Azure App Service?
enables you to build and host web apps, background jobs, mobile back-ends, and RESTful APIs in the programming language of your choice without managing infrastructure
What is Azure virtual networking?
enable Azure resources, such as VMs, web apps, and databases, to communicate with each other, with users on the internet, and with your on-prem client computers
What does a VPN do?
creates an encrypted tunnel in an untrusted network for two or more trusted networks to commuincate
What is a VPN gateway?
a type of virtual network gateway