フリー問題

問題文

A new account has to be able to log in and to build its own tables and it also has to read one table that another schema owns. A reviewer asks how the two kinds of privilege differ. Which statement draws that line?

選択肢

1. A system privilege allows an action anywhere in the database while an object privilege allows an action on one named object that somebody owns.
2. A system privilege lasts for one session while an object privilege lasts until the owner drops the object from the schema.
3. A system privilege is granted by the owner of an object while an object privilege is granted by a role that the account happens to hold.
4. A system privilege allows an action on one named object while an object privilege allows any action anywhere in the database.