Vertical Scaling
* Scale up and Scale down instance shape supported
* New shape must have the some hardware architecture.
* Downtime is required. The instance must be stopped before resize it Reference:
https://www.youtube.com/watch?v=9FsUBTyeAP4&list=PLKCk3OyNwIzuHYigVbdtDOZOfChcotfj2&index
=5

Explanation
IAM components are
RESOURCE
Thecloud objects that your company’s employees create and use when interacting with Oracle Cloud Infrastructure. For example: compute instances, block storage volumes, virtual cloud networks (VCNs), subnets, route tables, etc.
USER
An individual employee or system that needs to manage or use your company’s Oracle Cloud Infrastructure resources. Users might need to launch instances, manage remote disks, work with your virtual cloud network, etc. End users of your application are not typically IAM users. Users have one or more IAM credentials (see User Credentials).
POLICY
A document that specifies who can access which resources, and how. Access is granted atthe group and compartment level, which means you can write a policy that gives a group a specific type of access within a specific compartment, or to the tenancy itself. If you give a group access to the tenancy, the group automatically gets the same typeof access to all the compartments inside the tenancy. For more information, see Example Scenario and How Policies Work. The word “policy” is used by people in different ways: to mean an individual statement written in the policy language; to mean a collection of statements in a single, named “policy” document(which has an Oracle Cloud ID (OCID) assigned to it); and to mean the overall body of policies your organization uses to control access to resources.
GROUP
A collection of users who all need the same type of access to a particular set of resources or compartment.
DYNAMIC GROUP
A special type of group that contains resources (such as compute instances) that match rules that you define (thus the membership can change dynamically as matching resources are created or deleted). These instances act as “principal” actors and can make API calls to services according to policies that you write for the dynamic group.
NETWORK SOURCE
A group of IP addresses that are allowed to access resources in your tenancy. The IP addresses can be public IP addresses or IP addressesfrom a VCN within your tenancy. After you create the network source, you use policy to restrict access to only requests that originate from the IPs in the network source.
COMPARTMENT
A collection of related resources. Compartments are a fundamental component of Oracle Cloud Infrastructure for organizing and isolating your cloud resources. You use them to clearly separate resources for the purposes of measuring usage and billing, access (through the use of policies), and isolation (separating the resourcesfor one project or business unit from another). A common approach is to create a compartment for each major part of your organization. For more information, see Setting Up Your Tenancy.
TENANCY
The root compartment that contains all of your organization’s Oracle Cloud Infrastructure resources. Oracle automatically creates your company’s tenancy for you. Directly within the tenancy are your IAM entities (users, groups, compartments, and some policies; you can also put policies into compartments inside the tenancy). You place the other types of cloud resources (e.g., instances, virtual networks, block storage volumes, etc.) inside the compartments that you create.
HOME REGION
The region where your IAM resources reside. All IAM resources are global and available across all regions, but the master set of definitions reside in a single region, the home region. You must make changes to your IAM resources in your homeregion. The changes will be automatically propagated to all regions. For more information, see Managing Regions.
FEDERATION
A relationship that an administrator configures between an identity provider and a service provider. When you federate Oracle Cloud Infrastructure with an identity provider, you manage users and groups in the identity provider. You manage authorization in Oracle Cloud Infrastructure’sIAM service. Oracle Cloud Infrastructure tenancies are federated with Oracle Identity Cloud Service by default.

Reference: https://www.oracle.com/a/ocom/docs/cloud/security-overview-100.pdf#page=32

Reference: https://blogs.oracle.com/cloud-infrastructure/oracle-functions-now-generally-available

Reference: https://docs.oracle.com/en-
us/iaas/tools/python/2.41.0/api/monitoring/models/oci.monitoring.models.AlarmStatusSummary.html

Reference: https://www.oracle.com/partners/en/partner-with-oracle/develop-solutions/why/increase- value-reduce-cost-3907933.pdf

Reference: https://docs.cloud.oracle.com/en-us/iaas/pdf/ug/OCI_User_Guide.pdf
https://docs.cloud.oracle.com/en-us/iaas/Content/GSG/Tasks/contactingsupport.htm

Explanation
Open a support service requestwith MOS option is available to paid accounts. Customers using only Always Free resources are not eligible for Oracle Support. Limited support is available to Free Tier accounts with Free Trial credits. After you use all of your credits or after your trialperiod ends (whichever comes first), you must upgrade to a paid account to access Oracle Support. If you choose not to upgrade and continue to use Always Free Services, you will not be eligible to raise a service request in My Oracle Support.
In additionto support for technical issues, use My Oracle Support if you need to:
Reset the password or unlock the account for the tenancy administrator
Add or change a tenancy administrator
Request a service limit increase

Correct. The Oracle Cloud Infrastructure Monitoring service enables you to actively and passively monitor your cloud resources using the Metrics and Alarms features.

Reference: https://www.oracle.com/in/cloud/free/

Reference: https://www.oracle.com/cloud/networking/virtual-cloud-network-faq.html#category- general

Correct. Data Flow can be used to easily create, share, run, and view the output of Apache Spark applications.

Fault Domains 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. About Regions and Availability Domains Oracle Cloud Infrastructure is hosted in regions and availability domains. A region is a localized geographic area, and an availability domain is one or more data centers located within a region. A region is composed of one or more availability domains. Most Oracle Cloud Infrastructure resources are either region-specific, such as a virtual cloud network, or availability domain-specific, such as a compute instance. Traffic between availability domains and between regions is encrypted. Availability domains are isolated from each other, fault tolerant, and very unlikely to fail simultaneously. Because availability domains do not share infrastructure such as power or cooling, or the internal availability domain network, a failure at one availability domain within a region is unlikely to impact the availability of the others within the same region.

Explanation
You cando Costs Analysis in OCI and you can group and filter the cost by Tags or compartments To filter costs by dates To filter costs by tags To filter costs by compartments To remove a compartment or tag filter

Reference:
https://www.youtube.com/watch?v=KKDLIjy2yJM&list=PLKCk3OyNwIzuHYigVbdtDOZOfChcotfj2&index
=7

Explanation
Infrastructure as a service (IaaS) is a type of cloud service model in which computing resources arehosted 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://docs.cloud.oracle.com/en-us/iaas/Content/Billing/Concepts/budgetsoverview.htm

Correct. Oracle Cloud Infrastructure Container Engine for Kubernetes is a fully-managed, scalable, and highly available service that you can use to deploy your containerized applications to the cloud.

Reference: https://www.oracle.com/assets/paas-iaas-pub-cld-srvs-pillar-4021422.pdf
https://www.youtube.com/watch?v=KP6EOGlRTvk&list=PLKCk3OyNwIzuHYigVbdtDOZOfChcotfj2&index
=11