Final answer:
To create or modify OCI resources, one can use the OCI REST APIs for programmatic access and the OCI CLI for command-line management and automation.
Step-by-step explanation:
The two methods that you can use to create or modify Oracle Cloud Infrastructure (OCI) resources are the OCI REST APIs and the OCI Command-Line Interface (CLI). The OCI REST APIs provide a programmatic way to interact with OCI resources using HTTP requests, which is ideal for automation and integration with other services. On the other hand, the OCI CLI is a powerful command-line tool that enables you to manage OCI resources, perform operations, and automate tasks through scripts.