AZ-900 - Understanding costs, High Availability and more

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Hi everyone

I am new to Azure and Cloud Computing in general. I'm creating two VMs in a resource group and placing them inside an Availability Zone in a region.

Now I am trying to understand a few things and please correct me if I am wrong.

1. Imagine I have created them and now I want to deploy my web app to the VMs. So do I need to deploy the same app manually on both VMs to have high availability? Or I need to deploy the web app on one VM and Azure will automatically replicate the app on the other VM when the traffic peaks or in the case of data center goes down?

2. After having created the VMs, I would like to see how much it has costed me after an hour of usages. How can I see that for those particular VMs?

Those may be somewhat naïve questions but I am new to this stuff. But I am enjoying learning them. ITProTV has put together the course really well. Thanks for that!

1 - the typical methodology here is that you have two or more VMs and you have manually installed your Web app on them. They are then load balanced against, and of course, if one fails, it is no longer part of the load balancing. Notice that Azure and AWS offer auto-scaling options. When you do auto-scaling, the new VMs running the Web app can be cloned and brought up or brought down as needed based on demand.

2 - Azure includes the Cost Management console which permits you to study costs right down to specific VMs. You can even create alerts when costs breach thresholds that you set. This is ALWAYS a great idea with the cloud, as you can avoid very distressing and surprising monthly bills.