单项选择题

A.The database user OPS$SKD will be able to administer ……

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.

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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.

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C.The user does not require quota on the TEMP tablespace to perform sort operations.
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A.Add a data file to the SMD tablespace.
B.Add a data file to the temporary tablespace associated with the user HR.
C.Resize the data file associated with the SMD tablespace to make it larger.
D.Alter the data file associated with the SMD tablespace to grow automatically.
E.Change the segment space management for the SMD tablespace to automatic. n segments is managed through free lists.

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A.The database automatically determines the extent-sizing policy for the tablespace.
B.The segments are automatically shrunk when the contents are removed from them.
C.The allocation of extents within the tablespace is managed through the dictionary tables.
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多项选择题Which statements are true regarding the USERS tablespace（）

A.A bitmap is used to record free extents.
B.Free extents information is managed within the tablespace.
C.Free extents information is managed in the SYSAUX tablespace.
D.The data dictionary tables are updated when extents are allocated or deallocated