I can confirm that I created multitenant database in silent mode plus using also response file: dbca -silent -createDatabase -responseFile dbca.rsp

As a result, my PDB database has no SYSTEM, SYSAUX, UNDO, TEMP, USERS. Just nothing, though it was created and I can connect to it. I can list these tablespaces in PDB but all of them seem SHARED from CDB, i.e. there is no separate data file on hard drive for PDB.