單項選擇題

Examine the commands executed in the following sequence：
1：SQL> CREATE ROLE mgrrole；
2：SQL> GRANT create user，select any table，connect，resource TO mgrrole；
3：SQL> GRANT select，update ON sh.sales TO mgrrole；
4：SQL> CREATE ROLE ceo IDENTIFIED BY boss；
5：SQL> GRANT mgrrole，drop any table，create any directory TO ceo；
6：SQL> GRANT ceo TO mgrrole；
Which statement is true about the above commands（）

A.The commands execute successfully.
B.Command 6 produces an error because of circular role grant.
C.Command 5 produces an error because a role cannot be granted to another role.
D.Command 3 produces an error because the MGRROLE role already contains system privileges.
E.The table created by HR remains and HR still has the CREATE TABLE system privilege.
F.The table created by HR remains and HR can grant the CREATE TABLE system privilege to other users.

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單項選擇題

Examine the following steps performed on a database instance：
1：The DBA grants the CREATE TABLE system privilege to the SKD user with ADMIN OPTION.
2：The SKD usercreates a table.
3：The SKD user grants theCREATETABLE system privilege to the HR user.
4：The HR user creates a table.
5：The DBA revokes the CREATE TABLE system privilege from SKD.
Which statement is true after step 5 is performed（）

A.The table created by SKD isnot accessibleand SKD cannot create new tables.
B.The tables created by SKD and HR remain， but both cannot create new tables.
C.The table created by HR remains and HR still has the CREATE TABLE system privilege.
D.The table created by HR remains and HR can grant the CREATE TABLE system privilege to other users.

單項選擇題

The user HR owns the EMP table. The user HR grants privileges to the user SCOTT by using this command：
SQL> GRANT SELECT，INSERT，UPDATE ON emp TO scott WITH GRANT OPTION； The user SCOTT executes this command to grant privileges to the user JIM： SQL> GRANT SELECT，INSERT，UPDATE ON hr.emp TO jim；
Now， the user HR decides to revoke privileges from JIM using this command： SQL> REVOKE SELECT，INSERT，UPDATE ON emp FROM jim； Which statement is true after HR issues the REVOKE command（）

A.The command fails because SCOTT still has privileges.
B.The command succeeds and privileges are revoked from JIM.
C.The command fails because HR cannot revoke the privileges from JIM.
D.The command succeeds and only HR has the privilege to perform the SELECT， INSERT， and UPDATEoperations on the EMP table.

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