Explanation

Section: Understand Core Azure Services

Explanation:
Box 1: No
Most services go to private preview then public preview before being released to general availability. The private preview is only available to certain Azure customers for evaluation purposes.
Box 2: Yes
Public Preview means that the service is in public beta and can be tried out by anyone with an Azure subscription. Services in public preview are often offered at a discount price.
Public previews are excluded from SLAs and in some cases, no support is offered.
Box 3: No
An Azure service in general availability is available to all Azure customers, not just a subset of the customers.
References:
https://azure-overview.com/Home/Faq

Explanation

The advanced monitoring capabilities in Security Center lets you track and manage compliance and governance over time. The overall compliance provides you with a measure of how much your subscriptions are compliant with policies associated with your workload.

Section: Understand Security, Privacy, Compliance and Trust
Explanation:
When you create a virtual machine, the default setting is to create a Network Security Group attached to the network interface assigned to a virtual machine.
A network security group works like a firewall. You can attach a network security group to a virtual network and/or individual subnets within the virtual network. You can also attach a network security group to a network interface assigned to a virtual machine. You can use multiple network security groups within a virtual network to restrict traffic between resources such as virtual machines and subnets.
You can filter network traffic to and from Azure resources in an Azure virtual network with a network security group. A network security group contains security rules that allow or deny inbound network traffic to, or outbound network traffic from, several types of Azure resources.
In this question, we need to add a rule to the network security group to allow the connection to the virtual machine on port 8080.
References:
https://docs.microsoft.com/en-us/azure/virtual-network/security-overview