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（）

单项选择题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.

单项选择题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.

单项选择题View the Exhibit and examine the privileges granted to the MGR_ROLE role. The user SKD has been granted the CONNECT and RESOURCE roles only. The database administrator （DBA） grants MGR_ROLE to the user SKD by executing the command： SQL> GRANT MGR_ROLE TO SKDWITH ADMIN OPTION；  Which statement is true about the user SKD after he she is granted this role（）

A.The user SKD can grant only the MGR_ROLE role to other users， but not the privileges in it. 
B.The user SKD can revoke the MGR_ROLE only from the users for whom he/she is the grantor.
C.The user SKD can grant the privileges in the MGR_ROLE role to other users， but not with ADMIN OPTION.
D.The user SKD can grant the privileges in the MGR_ROLE role to other users， but cannot revoke privileges from them.

单项选择题The database instance has the following parameter setting： OS_AUTHENT_PREFIX = OPS$ OS_ROLES = FALSE  REMOTE_OS_AUTHENT = FALSE REMOTE_OS_ROLES = FALSE TIMED_OS_STATISTICS = 0  You have a local operating system user SKD. You create a database user OPS$SKD， and then  assignexternal authentication. The user OPS$SKD has the CREATE SESSION privilege.  What would youachieve by the above process（）

A.The database user OPS$SKD will be able to administer the database.
B.The authentication detail for the database user OPS$SKD is recorded in the password file.
C.The local operating system user SKD will be able to access the database instance without specifying the username and password.
D.The database user OPS$SKD has to login with the password of the local operating system user SKD to access the database instance.

多项选择题Examinethecommand：SQL>ALTERUSERskdACCOUNTLOCK；Whichtwostatementsaretrueafterthecommandisexecuted（）

A.The SKD user cannot log in to the database instance.
B.The objects owned by the SKD user are not accessible to any user.
C.The other users can access the objects owned by the SKD user， on which they have access.
D.The password for the SKD user expires and the user is forced to change the password at the next log in.