A VM Class predefines hardware for Supervisor-managed VMs: " The VM class... defines such parameters as the number of virtual CPUs, memory capacity, and reservation settings. " Administration steps show these are configurable: " You can configure hardware resources such as CPU, memory, and different devices " when editing a VM class.
Additionally, the DCLI/API specification underscores CPU and Memory fields: " --cpu-count ... Required.
" and " --memory-mb ... Required. " for a VM class.
While network adapters, PCI devices, and instance storage can also be added via advanced config, the question asks for two; CPU and Memory are canonical, always-present VM Class resources per the core definition above.