VM Installation Minor Problem

Situation one: Use Sqlplus login

A normal password for the username will result in an error, because SYS is a super administrator outside the database, so when we log in

To enter a password: password +as sysdba (for example: 123456 as SYSDBA)
Situation Two: Use Pl/sql login

This is our usual login database is very normal operation, but with the SYS as the user name log in when it will be reported
Ora-28009:connection as SYS should be as SYSDBA OR sysoper such a mistake
The solution is:

You can log on successfully by changing the normal to SYSDBA or sysoper in the Connect as option box