OCA OCP Oracle Certification Exam Braindumps

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13.Which two statements are true regarding the execution of the correlated subqueries? (Choose
two.)
A.The nested query executes after the outer query returns the row.
B.The nested query executes first and then the outer query executes.
C.The outer query executes only once for the result returned by the inner query.
D.Each row returned by the outer query is evaluated for the results returned by the inner query.
Correct:A D 
14.OE and SCOTT are the users in the database. The ORDERS table is owned by OE. Evaluate the
statements issued by the DBA in the following sequence: CREATE ROLE r1; GRANT SELECT,
INSERT  ON  oe.orders  TO  r1;  GRANT  r1  TO  scott;  GRANT  SELECT  ON  oe.orders  TO  scott;
REVOKE SELECT ON oe.orders FROM scott; What would be the outcome after executing the
statements?
A.SCOTT would be able to query the OE.ORDERS table.
B.SCOTT would not be able to query the OE.ORDERS table.
C.The REVOKE statement would remove the SELECT privilege from SCOTT as well as from the role R1.
D.The REVOKE statement would give an error because the SELECT privilege has been granted to the
role R1.
Correct:A 
15.Evaluate the following SQL statement: ALTER TABLE hr.emp SET UNUSED (mgr_id); Which
statement is true regarding the effect of the above SQL statement?
A.Any synonym existing on the EMP table would have to be re-created.
B.Any constraints defined on the MGR_ID column would be removed by the above command.
C.Any views created on the EMP table that include the MGR_ID column would have to be dropped and
re-created
D.Any  index  created  on  the  MGR_ID  column  would  continue  to  exist  until  the  DROP  UNUSED
COLUMNS command is executed.
Correct:B