1Z0-1085-25 is a service-classification and control-placement exam. Strong answers usually come from knowing what each OCI service does, where IAM and networking controls apply, and which option is the simplest correct fit.
Tenancy: The top-level OCI account boundary that contains compartments, policies, and resources.
Policy statement: The IAM rule syntax used to grant an OCI group or dynamic group permission to do something in a scope.
What this guide emphasizes
OCI core concepts and service-map recognition
IAM basics, compartments, policies, and governance
networking basics, gateways, subnets, and security controls
compute, storage, and database service selection at a foundations level
What strong answers usually do
classify the question as identity, network, service map, or pricing and governance first
choose the service whose purpose matches the requirement directly
separate tenancy, compartment, and network boundaries instead of blending them
prefer the simplest accurate service description over vague cloud-general language