Correct Answer: A

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.

Usually 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.

Reference: https://docs.cloud.oracle.com/en-us/iaas/Content/General/Concepts/regions.htm

Correct Answer: A

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.

Reference: https://docs.cloud.oracle.com/en-us/iaas/Content/Database/Concepts/overview.htm

Correct Answer: C

APPLIANCE-BASED DATA TRANSFER You send your data as files on secure, high-capacity, Oracle-supplied storage appliances to an Oracle transfer site. Operators at the Oracle transfer site upload the data into your designated Object Storage bucket in your tenancy. This solution supports data transfer when you are migrating a large volume of data and when using disks is not a practical alternative. You do not need to write any code or purchase any hardware. Oracle supplies the transfer appliance and software required to manage the transfer. https:// docs.cloud.oracle.com/en-us/iaas/Content/DataTransfer/Concepts/overview.htm Oracle Cloud Infrastructure Data Transfer Appliance securely moves terabytes or petabytes data between on- premise data centers and the cloud. The service reduces data migration times from weeks or months to just hours and is available for data import to the cloud and data export from the cloud.

Reference: https://www.oracle.com/in/cloud/storage/data-transfer.html

Correct Answer: A

Infrastructure as a service (IaaS) is a type of cloud service model in which computing resources are hosted

in the cloud. Businesses can use the IaaS model to shift some or all of their use of on- premises or

colocated data center infrastructure to the cloud, where it is owned and managed by a cloud provider.

These infrastructure elements can include compute, network, and storage hardware as well as other

components and software.

How Does IaaS Work?

In a typical IaaS model, a business--which can be of any size--consumes services like compute, storage,

and databases from a cloud provider. The cloud provider offers those services by hosting hardware and

software in the cloud. The business will no longer need to purchase and manage its own equipment, or

space to host the equipment, and the cost will shift to a pay-as-you-go model.

When the business needs less, it pays for less. And when it grows, it can provision additional computing

resources and other technologies in minutes.

Reference: https://www.oracle.com/in/cloud/what-is-iaas/

Correct Answer: D

Changing the Shape of an Instance (Horizontal Scaling)

You can change the shape of a virtual machine (VM) instance without having to rebuild your instances or redeploy your applications. This lets you scale up your Compute resources for increased performance, or scale down to reduce cost.Autoscaling (vertical scaling) Autoscaling lets you automatically adjust the number of Compute instances in an instance pool based on performance metrics such as CPU utilization. This helps you provide consistent performance for your end users during periods of high demand, and helps you reduce your costs during periods of low demand. As load increases, instances are automatically provisioned: the instance pool scales out. As load decreases, instances are automatically removed: the instance pool scales in.

https://docs.cloud.oracle.com/en-us/iaas/Content/Compute/Tasks/resizinginstances.htm