Azure AZ-900 Questions and Answers Rated A+

Cloud Computing is the delivery of computing services—servers, storage, databases, networking, software, analytics, intelligence and more—over the internet (the cloud), enabling faster innovation, flexible resources, and economies of scale. You typically pay only for cloud services you use, helping lower your operating costs, run your infrastructure more efficiently, and scale as your business needs change. Cloud provider company providing the services Cloud computing services Compute power - such as Linux servers or web applications. Storage - such as files and databases. Networking - such as secure connections between the cloud provider and your company. Analytics - such as visualizing telemetry and performance data. VMs aren't the only computing choice there are two other popular options: containers and serverless computing. Containers provide a consistent, isolated execution environment for applications. They're similar to VMs except they don't require a guest operating system. Instead, the application and all its dependencies is packaged into a "container" and then a standard runtime environment is usedto execute the app. This allows the container to start up in just a few seconds, because there's no OS to boot and initialize. You only need the app to launch. Serverless computing lets you run application code without creating, configuring, or maintaining a server. The core idea is that your application is broken into separate functions that run when triggered by some action. This is ideal for automated tasks - for example, you can build a serverless process that automatically sends an email confirmation after a customer makes an online purchase. you only pay for the processing time used by each function as it executes. VMs and containers are charged while they're running - even if the applications on them are idle High availability The ability to keep services up and running for long periods of time, with very little downtime, depending on the service in question. Scalability The ability to increase or decrease resources for any given workload. You can add additional resources to service a workload (known as scaling out), or add additional capabilities to manage an increase in demand to the existing resource (known as scaling up). Scalability doesn't have to be done automatically. Elasticity