To get more understanding on below mention topics to clear the exam.

•Identify Oracle Database Cloud Services offerings

•Identify the differences between and benefits of User-Managed and
Autonomous Database Services on Oracle Cloud

•Describe the essentials of Oracle Cloud Infrastructure

•Identify the deployment options available in virtual machine and
bare metal DB systems

•Create and configure virtual machine DB systems

•Manage and monitor virtual machine DB systems

•Identify available database migration methods and techniques

Oracle Cloud Infrastructure (OCI) deliver a cloud platform that yields the highest performance for traditional and distributed applications, as well as highly available databases.

OCI offers the ability to run everything from small VMs to large bare metal clusters and highly available databases on the same isolated networks, accessible through the same APIs and Console, allowing apps to have direct, low-latency access to high-performance databases running on physical servers in the same infrastructure.

OCI Database Service runs on top of OCI, which specializes in bare metal servers, off-box networking (which accommodates any workload, engineered system, VM, or bare metal host all on the same network) and high-speed storage.

Security features of the OCI Database service include instance security isolation, network security, and total isolation, IPSec VPNs and FastConnect dedicated network circuits, and granular controls for users, in addition to secure methods for API and SSH access. We also have TDE on by default, with all backups and block and object storage encrypted by default. We will also look at the OCI load balancer, which supports encryption and auditing via the OCI audit logs.