Examine the following command:CREATE TABLE (prod_id number(4),Prod_name varchar2 (20),Category_id number(30),Quantity_on_hand number (3) INVISIBLE);Which three statements are true about using an invisible column in the PRODUCTS table、

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• 1Which three statements are true concerning unplugging a pluggable database (PDB)、

  A.The PDB must be open in read only mode.

  B.The PDB must be dosed.

  C.The unplugged PDB becomes a non-CDB.

  D.C.The unplugged PDB becomes a non-CDB.D.The unplugged PDB can be plugged into the same multitenant container database (CDB)

  E.B.The PDB must be dosed.C.The unplugged PDB becomes a non-CDB.D.The unplugged PDB can be plugged into the same multitenant container database (CDB)E.The unplugged PDB can be plugged into another CDB.

  F.The PDB data files are automatically removed from disk.

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• 2Examine the current value for the following parameters in your database instance:SGA_MAX_SIZE = 1024MSGA_TARGET = 700MDB_8K_CACHE_SIZE = 124MLOG_BUFFER = 200MYou issue the following command to increase the value of DB_8K_CACHE_SIZE:SQL> ALTER SYSTEM SET DB_8K_CACHE_SIZE=140M;Which statement is true、

  A.It fails because the DB_8K_CACHE_SIZE parameter cannot be changed dynamically.

  B.It succeeds only if memory is available from the autotuned components if SGA.

  C.It fails because an increase in DB_8K_CACHE_SIZE cannot be accommodated within SGA_TARGET.

  D.It fails because an increase in DB_8K_CACHE_SIZE cannot be accommodated within SGA_MAX_SIZ

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• 3Which two are true concerning a multitenant container database with three pluggable database、

  A.All administration tasks must be done to a specific pluggable database.

  B.The pluggable databases increase patching time.

  C.The pluggable databases reduce administration effort.

  D.The pluggable databases are patched together.

  E.Pluggable databases are only used for database consolidation.

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• 4Examine this command:SQL > exec DBMS_STATS.SET_TABLE_PREFS (‘SH’, ‘CUSTOMERS’, ‘PUBLISH’, ‘false’);Which three statements are true about the effect of this command、

  A.Statistics collection is not done for the CUSTOMERS table when schema stats are gathered.

  B.Statistics collection is not done for the CUSTOMERS table when database stats are gathered.

  C.Any existing statistics for the CUSTOMERS table are still available to the optimizer at parse time.

  D.B.Statistics collection is not done for the CUSTOMERS table when database stats are gathered.C.Any existing statistics for the CUSTOMERS table are still available to the optimizer at parse tim

  E.D.Statistics gathered on the CUSTOMERS table when schema stats are gathered are stored as pendingE.Statistics gathered on the CUSTOMERS table when database stats are gathered are stored as pending statistics.

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• 5In a recent Automatic Workload Repository (AWR) report for your database, you notice a high number of buffer busy waits. The database consists of locally managed tablespaces with free list managed segments.On further investigation, you find that buffer busy waits is caused by contention on data blocks.Which option would you consider first to decrease the wait event immediately、

  A.Decreasing PCTUSED

  B.Decreasing PCTFREE

  C.Increasing the number of DBWN process

  D.Using Automatic Segment Space Management (ASSM)

  E.Increasing db_buffer_cache based on the V$DB_CACHE_ADVICE recommendation

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• 6You wish to enable an audit policy for all database users, except SYS, SYSTEM, and SCOTT.You issue the following statements:SQL> AUDIT POLICY ORA_DATABASE_PARAMETER EXCEPT SYS;SQL> AUDIT POLICY ORA_DATABASE_PARAMETER EXCEPT SYSTEM;SQL> AUDIT POLICY ORA_DATABASE_PARAMETER EXCEPT SCOTT;For which database users is the audit policy now active、

  A.All users except SYS

  B.All users except SCOTT

  C.All users except sys and SCOTT

  D.All users except sys, system, and SCOTT

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• 7On your Oracle 12c database, you invoked SQL *Loader to load data into the EMPLOYEES table in the HR schema by issuing the following command:$> sqlldr hr/hr@pdb table=employeesWhich two statements are true regarding the command、

  A.It succeeds with default settings if the EMPLOYEES table belonging to HR is already defined in the database.

  B.It fails because no SQL *Loader data file location is specified.

  C.It fails if the HR user does not have the CREATE ANY DIRECTORY privilege.

  D.C.It fails if the HR user does not have the CREATE ANY DIRECTORY privileg

  E.D.It fails because no SQL *Loader control file location is specified.

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• 8 You must track all transactions that modify certain tables in the sales schema for at least three years.Automatic undo management is enabled for the database with a retention of one day.Which two must you do to track the transactions、

  A.Enable supplemental logging for the database.

  B.Specify undo retention guarantee for the database.

  C.Create a Flashback Data Archive in the tablespace where the tables are store

  D.D.Create a Flashback Data Archive in any suitable tablespac

  E.E.Enable Flashback Data Archiving for the tables that require tracking.

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• 9Your are the DBA supporting an Oracle 11g Release 2 database and wish to move a table containing several DATE, CHAR, VARCHAR2, and NUMBER data types, and the table’s   indexes, to another tablespace.The table does not have a primary key and is used by an OLTP application.Which technique will move the table and indexes while maintaining the highest level of availability to the application、

  A.Oracle Data Pump.

  B.An ALTER TABLE MOVE to move the table and ALTER INDEX REBUILD to move theindexes.

  C.An ALTER TABLE MOVE to move the table and ALTER INDEX REBUILD ONLINE to move the indexes.

  D.Online Table Redefinition.

  E.Edition-Based Table Redefinition.

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• 10What are two benefits of installing Grid Infrastructure software for a stand-alone server before installing and creating an Oracle database、

  A.Effectively implements role separation

  B.Enables you to take advantage of Oracle Managed Files.

  C.Automatically registers the database with Oracle Restart.

  D.Helps you to easily upgrade the database from a prior releas

  E.E.Enables the Installation of Grid Infrastructure files on block or raw devices.

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