Azure Administrator

 Azure Virtual Machine - Disks 

2 disks are attached to VMs

1. OS Disk - Managed Disk
2. Data Disk - Managed Disk
3. Temporary Disk (Some instances) - Non-Managed Disk

Note: 3 replicas are maintained for these disks in Azure

Temporary Disk is not a managed disk. Data can be lost during a maintenance event or when you redeploy your VM.

Throughput: Bytes read/written per sec - Copy large videos

IOPS: Read/Write operations per sec - Databases

Resource Tags

Used to organize the resource

Associate a Key-Value pair with a resource

Associate a resource with a specific department, add a name-value pair
Department = Logistics

Usage:

1. Search Resources: Filter based on tags.
2. Cost Management: Filter based on tags

Note: When you apply tags a resource group level, its not going to apply the tags to resource under the resource group. Its not inherited.

Resource Group

Note: If you move a resource across resource groups e.g. from RG1 to RG2, it will not change its location. For example, a resource R1 located in 'North Europe' and resource group RG1 when moved to a resource RG2 in East US, the location of the resource R1 would remain unchanged.
Resource Group is used only for logical grouping for resources.

Azure AD

There is a trust relationship between Azure AD and Azure Subscription.
Each subscription can only trust one Azure AD directory.
However, multiple subscriptions can trust the same directory. The relationship is many to one.

n subscriptions <=> 1 Azure AD directory