Explanation/Reference:
Explanation:
Opc is the system administrator account you use to connect to the compute node using SSH. This user can use the sudo command to perform operations that require root-user access.
Connect as the user opc to perform operations that require root access to the compute node, such as backing up or patching; this user can use the sudo command to gain root access to the compute node.
Incorrect Answers:
B: The root user is the root administrator for the system. You do not have direct access to this account. To perform operations that require root-user access, use the sudo command as the opc user.
References: https://docs.oracle.com/en/cloud/paas/database-dbaas-cloud/csdbi/linux-user-accounts- rac.html
Using Oracle Database Cloud Service (February 2017), page 5-3
https://docs.oracle.com/en/cloud/paas/database-dbaas-cloud/csdbi/using-oracle-database-cloud- service.pdf