Notes from Learning path for AZ-900

geographies are broken into the following areas

America Europe Asia Pacific Middle East and Africa

Which Azure support plan is best for business-critical workloads? Azure Developer Azure Professional Direct Azure Standard

Azure Professional Direct

To use Azure datacenters that are made available with power, cooling, and networking capabilities independent from other datacenters in a region, choose a region that supports _________? Geography distribution Service-Level Agreements (SLAs) Availability Zones

Availability Zones

Features used for Scaling VM's

Availability sets Virtual Machine Scale Sets Azure Batch

Elasticity

A cloud computing system automatically adding or removing resources based on workload

Public Preview

An Azure feature marked "public preview" is available to all Azure customers for evaluation purposes. These previews can be turned on through the preview features page as detailed below.

Which of the following statements is true about an Azure subscription? Using Azure does not require a subscription An Azure subscription is a logical unit of Azure services You can't have more than one subscription

An Azure subscription is a logical unit of Azure services

Which of the following is an example of an Azure application platform? Azure App Service Azure Table Storage Azure Cache for Redis Azure Load Balancer

Azure App Service

What is an App Service?

Azure App Service is an HTTP-based service that enables you to build and host many types of web-based solutions without managing infrastructure.

Azure management tools

Azure portal Azure PowerShell Azure Command-Line Interface (CLI) Azure Cloud Shell Azure mobile app

When you create an Azure resource like a virtual machine, you select the ______________ it belongs to. Billing account Billing profile Azure subscription

Azure subscription

What is an Availability Zone?

Physically separated datacenters within Azure region Each zone is made up of one or more data centers equipped with independent power cooling and networking. Set up to be an isolation boundary

Feature preview categories

Private Preview Public Preview

Describe containers?

Provides a consistent, isolated execution environment for apps. Similar to VMs without OS. The Apps & dependencies are packaged in a "container" and then a standard runtime environment is used to execute the app.

Cloud deployment models

Public cloud Private cloud Hybrid cloud

The following have 3 separate zones for resiliency

Central US East US 2 West US 2 West Europe France Central North Europe Southeast Asia

high-level services Azure offers

Compute Services Cloud Storage Networking App Hosting AI Internet of Things Integration Security

What is Azure Cloud Shell?

a browser-based command-line experience for managing and developing Azure resources. Think of Cloud Shell as an interactive console that you run in the cloud.

Capital Expenditure (CapEx)

the spending of money on physical infrastructure then deducting that expense from your tax bill over time. CapEx is an upfront cost, which has a value that reduces over time.

Operational Expenditure (OpEx)

Spending money on services or products now and being billed for them now. You can deduct this expense from your tax bill in the same year. There's no upfront cost. You pay for a service or product as you use it.

What is the Microsoft Azure Marketplace?

The Microsoft Azure Marketplace is an online store that hosts applications that are certified and optimized to run in Azure.

Containers

virtualization environment for running applications. containers run on top of a host OS but don't include an operating system

Default Dashboard Parts

Dashboard controls All resources tile Quickstarts + tutorials tile Service Health tile Marketplace tile

What is a region pair ?

Each Azure region is always paired with another region within the same geography at least 300 miles away

Private cloud model Advantages

Ensure support of legacy application Control (and responsibility) over security Meet strict compliance requirements

Which term from the list below would be viewed as benefits of using cloud services?

Flexibility

What are the two core components of Resiliency?

High availability disaster recovery

Public cloud model Advantages

High scalability/agility Pay-as-you-go pricing Not responsible for maintenance/updates Minimal technical knowledge

Suppose you have two types of applications: legacy applications that require specialized mainframe hardware and newer applications that can run on commodity hardware. Which cloud deployment model would be best for you?

Hybrid

Hybrid cloud model Advantages

Keep systems running/accessible that use out-of-date hardware or OS Flexibility with what you run locally vs cloud Take advantage of economies of scale from public cloud providers when cheaper, supplement with your own equipment when it's not Use your own equipment for compliance, or legacy scenarios to completely control the environment

OpEx cloud computing costs

Leasing software and customized features Scaling charges based on usage/demand Billing at the user or organization level

Your billing is based on your usage of Azure resources and is invoiced ______________ Annually Monthly Daily

Monthly

Azure Marketplace

where you start when creating new resources find, try, purchase, and provision applications and services

You're developing an application and want to focus on building, testing, and deploying. You don't want to worry about managing the underlying hardware or software. Which cloud service type is best for you?

PaaS

three key characteristics of SLAs for Azure products and services:

Performance Targets Uptime and Connectivity Guarantees Service credits

Resiliency

Refers to a system's ability to stay operational during -abnormal conditions. Natural disasters System maintenance Spikes in traffic to your site Threats made by malicious parties is the ability of a system to recover from failures and continue to function responding to failures in a way that avoids downtime or data loss

Deploying an app can be done directly to what level of physical granularity? Region Datacenter Server rack

Region

Which Azure service allows you to configure fine-grained access management for Azure resources, enabling you to grant users only the rights they need to perform their jobs? Locks Policy Initiatives Role-based Access Control

Role-based Access Control

CapEx computing costs

Server costs Storage costs Network costs Backup and archive costs Organization continuity and disaster recovery costs Datacenter infrastructure costs Technical personnel - not a capital expenditure

Economies of scale

The ability to do things more efficiently or at a lower-cost per unit when operating at a larger scale.

Agility

The ability to rapidly change an IT infrastructure to adapt to the evolving needs of the business. Lets you manage your costs dynamically, optimizing spending as requirements change.

SaaS Management

The cloud provider is responsible for managing everything end user just uses the software

PaaS Management

The cloud provider manages the operating systems, and the user is responsible for the applications and data they run and store.

Public cloud deployment model

The most common deployment model. You have no local hardware to manage. Everything runs on your provider's hardware. Save additional costs by sharing computing resources

Application availability refers to what? The service level agreement of the associated resource. Application support for an availability zone. The overall time that a system is functional and working.

The overall time that a system is functional and working.

what is a resource group in Azure?

The resource group allows us to administer all the services, disks, network interfaces, and other elements that potentially make up our solution as a unit.

IaaS Management

The user is responsible for managing the operating systems, data, and applications.

Isolated workload category

This category is ideal for workloads that require advanced networking and fine-grained scaling.

Virtual machines

VMs, are software emulations of physical computers. infrastructure as a service (IaaS) in the form of a virtualized server Ideal for Total control over the operating system (OS) The ability to run custom software, or To use custom hosting configurations

4 techniques for preforming compute in Azure

Virtual machines Containers Azure App Service Serverless computing

Composite SLA

When combining SLAs across different service offerings, the resultant SLA is called a Composite SLA. The resulting composite SLA can provide higher or lower uptime values, depending on your application architecture.

Private cloud deployment model

you create a cloud environment in your own datacenter and provide self-service access to compute resources to users in your organization

Zonal Services

You pin the resources to a specific zone VM's Disks IP's

Two Categories of Services that support Availability zones

Zonal services Zone-redundant services

dashboard

a customizable collection of UI tiles create dashboards for specific roles use role-based access control (RBAC) specific dashboard for each environment JavaScript Object Notation (JSON) uploaded and downloaded to other computers stored within resource groups can also customize them programmatically some tile types can be query-based

Azure Advisor

a free service built in provides recommendations on high availability, security, performance, operational excellence, cost. You can view recommendations in the portal or download them in PDF or CSV format.

What is a region?

a geographical area on the planet containing at least one, but potentially multiple datacenters that are nearby and networked together with a low-latency network.

Azure App Service

a platform-as-a-service (PaaS) offering in Azure that is designed to host enterprise-grade web-oriented applications.

Azure mobile app

access, manage, and monitor accounts and resources Check the current status and metrics get notifications and alerts about health issues diagnose and fix issues Review alerts Start, stop, and restart VM's or web apps Connect to your VM's Manage permissions with role-based access control (RBAC) Use Azure Cloud Shell to run saved scripts or perform ad hoc administrative tasks

Scale

adding network bandwidth, memory, storage, or compute power to achieve better performance.

Horizontal scaling

also known as "scaling out", is the process of adding more servers that function together as one unit.

Vertical scaling

also known as "scaling up", is the process of adding resources to increase the power of an existing server.

Azure Cloud Shell

browser-accessible shell Bash or PowerShell create an Azure Storage Account $HOME folder - scripts/data here is kept across sessions Each subscription has a unique storage account

Serverless computing

cloud-hosted execution environment that runs your code but completely abstracts the underlying hosting environment. You create an instance of the service, and you add your code; no infrastructure configuration or maintenance is required, or even allowed.

Hybrid cloud deployment model

combines public and private clouds, allowing you to run your applications in the most appropriate location.

Benefits of cloud computing

cost-effective consumption-based scalable elastic current - up to date reliable global secure compliance

Application SLA

creating your own SLAs, you can set performance targets to suit your specific Azure application

Azure CLI

cross-platform command-line program that connects to Azure and executes administrative commands on Azure resources

Service Credits

customers may have a discount applied to their Azure bill, as compensation for an under-performing Azure product or service.

Performance Targets

defines are specific to each Azure product and service. example: performance targets for some Azure services are expressed as uptime guarantees or connectivity rates.

Fault Tolerance

ensures that your customers aren't impacted when a disaster occurs

Private Preview

feature marked "private preview" is available to specific Azure customers for evaluation purposes. This is typically by invite only and issued directly by the product team responsible for the feature or service.

Dev / Test workload category

ideal for less demanding workloads. predominantly focused on providing shared infrastructure. has additional features that become available to the App Service application. For example, Custom domains / SSL and manual scale.

Production workload category

ideal for more demanding workloads. In this category, you'll also notice added features such as staging slots, daily backups, and a traffic manager.

Scalability

increase or decrease the resources and services used based on the demand or workload at any given time.

Private cloud model Disadvantages

initial CapEx costs limits agility limits scalability you must buy, install, setup require IT skills and expertise

Hybrid cloud model Disadvantages

involves some CapEx cost up front more complicated to set up and manage

Azure PowerShell

module for Windows PowerShell or PowerShell Core cross-platform version shell window and command parsing adds the Azure-specific commands

consumption-based model

pay-as-you-go pay for additional resources only when needed. stop paying for resources no longer needed.

Zone-redundant

platform replicates automatically across zones

Azure portal

public website create, manage, and monitor services. identify a service get help on a topic deploy, manage, and delete resources administrative tasks using wizards and tooltips.

Availability

refers to the time that a system is functional and working refers to how long your service is up and running without interruption.

Public cloud model Disadvantages

specific security requirements government policies industry standards legal requirements hardware owned by provider services owner by provider unable to personally manage unique business requirements maintaining a legacy application

What is cloud computing?

the delivery of computing services over the Internet using a pay-as-you-go pricing model.