User SCOTT executes the following command on the EMP table but has not issued COMMIT， ROLLBACK， or any data definition language （DDL） command： SQL> SELECT ename FROM emp 
2 WHERE job=’CLERK’ FOR UPDATE OF empno； 
SCOTT has opened another session to work with the database instance. 
Which three operations wouldwait when issued in SCOTT’s second session（）

The HR user creates a stand-alone procedure as follows and grants the EXECUTE privilege on theprocedure to many database users： 
CREATE OR REPLACE PROCEDURE create_dept （ v_deptno NUMBER， v_dname VARCHAR2， v_mgr NUMBER， v_loc NUMBER） BEGIN 
INSERT INTO hr.departments VALUES （v_deptno， v_dname， v_mgr， v_loc）； END； 
The users having permission to execute the procedure are able to insert records into the 
DEPARTMENTStable even though they do not have the INSERT privilege on the table. You want only those users whohave privileges on the DEPARTMENTS table to be able to execute the procedure successfully. 
What would you suggest to the PL/SQL developers to achieve this（）