Oracle Updated 1z0-1085-23 Exam Questions and Answers by shiloh

A fault domain is a grouping of hardware and infrastructure within an availability domain. Each availability domain contains three fault domains. Fault domains provide anti-affinity: they let you distribute your instances so that the instances are not on the same physical hardware within a single availability domain. A hardware failure or Compute hardware maintenance event that affects one fault domain does not affect instances in other fault domains. In addition, the physical hardware in a fault domain has independent and redundant power supplies, which prevents a failure in the power supply hardware within one fault domain from affecting other fault domains.

To control the placement of your compute instances, bare metal DB system instances, or virtual machine DB system instances, you can optionally specify the fault domain for a new instance or instance pool at launch time. If you don't specify the fault domain, the system selects one for you. Oracle Cloud Infrastructure makes a best-effort anti-affinity placement across different fault domains, while optimizing for available capacity in the availability domain. To change the fault domain for an instance, terminate it and launch a new instance in the preferred fault domain.

Use fault domains to do the following things:

Protect against unexpected hardware failures or power supply failures.

Protect against planned outages because of Compute hardware maintenance.

We can use fault domains to do the following things:

1) Protect against unexpected hardware failures or power supply failures.

2) Protect against planned outages because of Compute hardware maintenance

There are two types of DB systems on virtual machines:

· A 1-node virtual machine DB system consists of one virtual machine.

· A 2-node virtual machine DB system consists of two virtual machines. (RAC)

A virtual machine DB system database uses Oracle Cloud Infrastructure block storage instead of local storage. You specify a storage size when you launch the DB system, and you can scale up the storage as needed at any time.

For 1-node virtual machine DB systems, Oracle Cloud Infrastructure provides have a "fast provisioning" option that allows you to create your DB system using Logical Volume Manager as your storage management software.

Oracle Cloud Infrastructure offers single-node DB systems on either bare metal or virtual machines, and 2-node RAC DB systems on virtual machines. If you need to provision a DB system for development or testing purposes, then a special fast provisioning single-node virtual machine system is available.

You can manage these systems by using the Console, the API, the Oracle Cloud Infrastructure CLI, the Database CLI (DBCLI), Enterprise Manager, Enterprise Manager Express, or SQL Developer.

These statements are true regarding OCI regions. A region is a localized geographic area that hosts one or more availability domains. An availability domain is one or more data centers that host OCI resources such as compute instances, block volumes, and subnets. Availability domains are isolated from each other, fault tolerant, and very unlikely to fail simultaneously1

Some regions provide multiple availability domains, while some regions provide a single availability domain. The number of availability domains per region varies depending on the region type and the customer demand. You can check the list of regions and their availability domains here: 2

• Commercial regions: These are the standard regions that are available to all customers and offer a wide range of OCI services and features. Commercial regions can have one, two, or three availability domains per region.
• Government regions: These are the regions that are dedicated to US government customers and meet specific compliance and security requirements. Government regions can have one or two availability domains per region.
• Dedicated regions: These are the regions that are deployed within a customer’s data center and provide a fully managed OCI environment that is consistent with the public cloud regions. Dedicated regions can have one or two availability domains per region.

The other statements are false regarding OCI regions. There is no concept of subregions in OCI. A region is composed of one or more availability domains, not subregions1

Regions do not only provide test/dev environments. Regions can host any type of workload or application, whether it is for production, development, testing, or disaster recovery purposes. Regions offer different performance levels, service levels, and pricing options to suit different customer needs and use cases1

Regions do not provide a single fault domain. A fault domain is a grouping of hardware and infrastructure within an availability domain that is designed to be isolated from failures in other fault domains. Fault domains let you distribute your instances so that they are not on the same physical hardware within a single availability domain. Each availability domain has three fault domains, regardless of the number of availability domains in a region3

A budget can be used to set soft limits on your Oracle Cloud Infrastructure spending. You can set alerts on your budget to let you know when you might exceed your budget, and you can view all of your budgets and spending from one single place in the Oracle Cloud Infrastructure console.

How Budgets Work:

Budgets are set on cost-tracking tags or on compartments (including the root compartment) to track all spending in that cost-tracking tag or for that compartment and its children.

All budgets alerts are evaluated every 15 minutes. To see the last time a budget was evaluated, open the details for a budget. You will see fields that show the current spend, the forecast and the "Spent in period" field which shows you the time period over which the budget was evaluated. When a budget alert fires, the email recipients configured in the budget alert receive an email.