Which two Operating System users and groups must be created on each node before installing Oracle Grid Infrastructure 12c? 

Answer options:

A. an O/S user to own the Clusterware installation and a different O/S user to own the Automatic Storage Management (ASM) installation
B. an O/S group to own the software inventory
C. an O/S user to own the Oracle Database installation
D. an O/S group called dba
E. a group to own the ASMLIB-provisioned storage
F. a group to own Automatic-Storage Management (ASM) Filter Driver-provisioned storage

BD

B: Creating the Oracle Inventory Group If an Oracle Inventory Does Not Exist If the oraInst.loc file does not exist, then create the Oracle Inventory group by entering a command similar to the following: # /usr/sbin/groupadd -g 54321 oinstall The preceding command creates the oraInventory group oinstall, with the group ID number 54321. Members of the oraInventory group are granted privileges to write to the Oracle central inventory (oraInventory), and other system privileges for Oracle installation owner users. D: Oracle recommends that you create one software owner to own each Oracle software product (typically, oracle, for the database software owner user, and grid for Oracle Grid Infrastructure). Incorrect Answers: A: During an Oracle Grid Infrastructure installation, both Oracle Clusterware and Oracle Automatic Storage Management (Oracle ASM) are installed. You no longer can have separate Oracle Clusterware installation owners and Oracle ASM installation owners. References: https://docs.oracle.com/database/121/CWLIN/usrgrps.htm#CWLIN179