To back up a web app, you need to configure a custom backup that specifies a storage account and a container as the target for the backup1. The storage account must be in the same subscription as the web app, and the container must be accessible by the web app2. The backup size is limited to 10 GB, and the backup frequency can be configured to minimize costs.
According to the table, storage1 is the only storage account that meets these requirements. Storage1 is in the same subscription and region as the web app, and it is a general-purpose v2 account that supports custom backups. Storage2 and storage3 are in a different region than the web app, which may incur additional costs for data transfer. Storage4 is a FilesStorage account, which does not support custom backups.
Therefore, you should use storage1 as the target for the backup of your web app. To configure a custom backup, you can follow these steps:
In your app management page in the Azure portal, in the left menu, select Backups.
At the top of the Backups page, select Configure custom backups.
In Storage account, select storage1. Do the same with Container.
Specify the backup frequency, retention period, and database settings as needed.
Click Configure.
At the top of the Backups page, select Backup Now.

Explanation:
1## Create a Log Analytics workspace.
2## Collect Windows performance counters from the Log Analytics agents.
3## Create an alert rule.
The question states:
"You need to configure the alerts for VM1 and VM2 to meet the technical requirements." The technical requirement from the case study specifies:
"Trigger an alert if VM1 or VM2 has less than 20 GB of free space on volume C." This requirement involves monitoring performance metrics (disk space) and generating alerts based on those metrics. According to Microsoft Azure monitoring and management documentation, the process to configure such alerts involves using Azure Monitor and Log Analytics.
Step-by-Step Verified Solution:
Step 1: Create a Log Analytics workspace
A Log Analytics workspace is required to store and analyze logs and performance data collected from virtual machines.
Azure Monitor uses this workspace as the central repository for performance counters, events, and logs from connected agents.
From the Microsoft Documentation:
"Before you can collect and query data from virtual machines, you must create a Log Analytics workspace in your subscription." (Source: Azure Monitor and Log Analytics Guide) Step 2: Collect Windows performance counters from the Log Analytics agents After creating the workspace, you must connect VM1 and VM2 to the workspace and configure the Windows performance counters that you want to monitor.
In this case, you would collect the LogicalDisk(%) Free Space counter for C: drive.
Azure Monitor agent or Log Analytics agent collects these metrics and sends them to the workspace for analysis.
"To monitor system performance, configure the agent to collect performance counters such as available memory or free disk space." (Source: Azure Monitor Performance Counters Documentation) Step 3: Create an alert rule Once performance data is being collected, you can create an alert rule in Azure Monitor based on a Kusto query or metric threshold.
You would define a condition such as:
LogicalDisk | where FreeSpaceMB < 20480
and configure it to trigger an alert when free space on volume C drops below 20 GB.
This alert can notify via email, action group, or automation runbook.
"Alerts in Azure Monitor proactively notify you when important conditions are found in your monitoring data. Alerts can trigger automated actions or notifications." (Source: Azure Monitor Alerts Overview) Incorrect Options (Eliminated):
Configure the Diagnostic settings:
Used for collecting activity logs or resource logs, not performance counters from VMs.
Create an Azure SQL database:
Not relevant to the scenario of monitoring disk space.

https://learn.microsoft.com/en-us/azure/virtual-network/ip-services/configure-public-ip-firewall Azure Firewall is a cloud-based network security service that protects your Azure Virtual Network resources. Azure Firewall requires at least one public static IP address to be configured. This IP or set of IPs are used as the external connection point to the firewall. Azure Firewall supports standard SKU public IP addresses. Basic SKU public IP address and public IP prefixes aren't supported.

The Traffic Manager Contributor role is not related to Traffic Analytics. Traffic Manager is a service that provides DNS-based load balancing and traffic routing across different regions and endpoints. Traffic Manager Contributor is a role that allows you to create and manage Traffic Manager profiles, endpoints, and geographies1.
Traffic Analytics is a service that provides visibility into user and application activity in your cloud networks.
Traffic Analytics analyzes Azure Network Watcher network security group (NSG) flow logs to provide insights into traffic flow in your Azure cloud. With Traffic Analytics, you can visualize network activity, identify hot spots, secure your network, optimize your network deployment, and pinpoint network misconfigurations2.
To enable Traffic Analytics for an Azure subscription, you need to have a role that grants you the following permissions at the subscription level:
Microsoft.Network/applicationGateways/read
Microsoft.Network/connections/read
Microsoft.Network/loadBalancers/read
Microsoft.Network/localNetworkGateways/read
Microsoft.Network/networkInterfaces/read
Microsoft.Network/networkSecurityGroups/read
Microsoft.Network/publicIPAddresses/read
Microsoft.Network/routeTables/read
Microsoft.Network/virtualNetworkGateways/read
Microsoft.Network/virtualNetworks/read
Microsoft.OperationalInsights/workspaces/*
Some of the built-in roles that have these permissions are Owner, Contributor, or Network Contributor3.
However, these roles also grant other permissions that may not be necessary or desirable for enabling Traffic Analytics. Therefore, the best practice is to use the principle of least privilege and create a custom role that only has the required permissions for enabling Traffic Analytics4.
Therefore, to meet the goal of ensuring that an Azure AD user named Admin1 is assigned the required role to enable Traffic Analytics for an Azure subscription, you should create a custom role with the required permissions and assign it to Admin1 at the subscription level.

You can set expiration policy only for Office 365 groups in Azure Active Directory (Azure AD).
Note: With the increase in usage of Office 365 Groups, administrators and users need a way to clean up unused groups. Expiration policies can help remove inactive groups from the system and make things cleaner.
When a group expires, all of its associated services (the mailbox, Planner, SharePoint site, etc.) are also deleted.
You can set up a rule for dynamic membership on security groups or Office 365 groups.