OCP 052卷2 20-40
23.you want to import schema objects of the HR user using ORACLE DATA pump from the development database
DEVDB,to the production database, PRODDB.a databse link devdb.us.oracle.com is created between PRODDB and DEVDB
you execute the following command on the PRODDB databse server;
$impdp system/manager directory =DB_DATA
dumpfile=schemas.dat
schemas=hr
flashback_time = "TO_TIMESTAMP('25-08-2007 14:35:00', 'DD-MM-YYYY HH24:MI:SS')"
the command fails displaying the following error;
ORA-39001;invalid argument value
ORA-39000;bad dump file specification
ORA-31640;unable to open dumpfile '/home/oracle/schema/shemas.dat' for read
ORA-27037;unable to obtain file status
what would you do to overcome the error?
e.replace the dumpfile option with the network_link=devdb.us.oracle.com option
24.you execete this command to drop the ITEM table.shich has the primary key refered in the ORDERS table;
SQL>DROP TABLE SCOTT.ITEM cascade constraints purge;
which two statements sre true about the effect of the command?
a.no flashback is posible to bring back the item table
d.the dependent referenial integrity constarinsts in the ORADERS table are removed
指定cascade constraints 语句市值删除所有的参照完整性约束包括主键约束和唯一性约束
如果不指定此语句，则参照完整性约束还存在，drop table时会返回一个错误
drop table的同时释放了和它相关联的空间。如果指定purge那么数据库不会讲它和关联的对象放置到回收站的
falashback是基于回收站的，如果回收站没有相关信息，则无法恢复
26.which naming method users the tnsnames.ora file to store the connect description useed buy the client
while connecting to the database instance from a remote machine?
b.local naming method
27.which two statements are true about shared SQL area and private SQL area?
a.shared SQL area will be located in the shared pool
f.the number of the private sql area allocations is denpendent on the OPEN_CURSORS parameter
28.you configured the flash recovery area for your database.the database instance has been started in ARCHIVELOG mode
and the LOG_ARCHIVE_DEST_1 parameter is not set.
what will be the ipplications on the archiving and the location of archive redo log file
c.Archiving will be enabled and the destination for the archived redo log file will be set to the flash recovery area implicitly
31.shich two statements are not supported by the data recovery advisor (DRA)
a.recover from failures in the RAC environment
d.diagnose and repair failures on a standby database
database recovery advisor 支持的数据库配置
--单实例
--非RAC
--支持故障转移到备用数据库，但不支持分析和修复备用数据库
34.which two statements are true regarding the SGA_TARGET intialization parameter?
a.it can be increased up to the value of the SGA_MAX_SIZE parameter
b.increasing the value of the SGA_TARGET parameter distributes the increased memory among all the autotuned components
35.which statement is true about the manageability monitor(mmon) backgroud process?
a.it transfers from memory to disk at regular intervals
默认情况下，数据库每60分钟从SGA中自动捕获一次统计信息，然后将其以快照形式存储在AWR中。这些快照通过一个名叫易管理性监视器（mmon）
的后台进程存储在磁盘上。默认情况下快照会保存八天。可以修改快照时间间隔和保留间隔
37.automatic shared memory managemant (ASMM) has been enabled for your database instance.the initialization parameter for the components that are managed by ASMM are not set,after observing the effects of ASMM,you executed the following command;
SQL>ALTER SYSTEM SET DB_CACHE_SIZE=100m
which statement is true in this scenario?
a.the minimum memory size for the databse buffer cache is set to 100mb