You created the DEPT table by using the following command：  
CREATE TABLE scott.dept  
（deptno NUMBER（3），  
dname VARCHAR2（15），  
loc VARCHAR2（15） ）  
STORAGE （INITIAL 100K NEXT 50K  MAXEXTENTS 10 PCTINCREASE 5  FREELIST GROUPS 6 FREELISTS 4）；You are required to shrink the DEPT table. While performing the shrink operation， you want to ensure that the recovered space is returned to the tablespace in which the DEPT table is stored. You do not want to shrink the indexes created on the DEPT table. What will you do to shrink the SCOTT.EMP table？（）

单项选择题This is the online redo log files and the control file configurations： Based on these configurations， which statement is true？（）

A. Both the control files and the online redo log files are configured properly.
B. The control files are configured properly， but the online redo log files are not configured properly.
C. The online redo log files are configured properly， but the control files are not configured properly.
D. Neither the control files nor the online redo log files are configured properly.

单项选择题YouaremaintainingyourOLTPdatabaseinOracle10g.Whileobservingtheperformanceofthedatabase，youfindthatthelogswitchoccursmorethanonceforevery20minutes，affectingthedatabaseperformance.Whichfactorisresponsibleforfrequentlogswitches？（）

A.the value of the UNDO_RETENTION initialization parameter
B.the value of the optimal redo log file size provided by the Redo Logfile Size Advisor
C.the online redo log files size
D.the number of redo log members in a group

单项选择题YouaremaintainingyourdatabaseinOracle10g.YouhavesetthevalueoftheSTATISTICS_LEVELinitializationparametertoTYPICALandthevalueoftheFAST_START_MTTR_TARGETparameterto900seconds.Toincreasetheperformanceofthedatabase，youwanttodeterminetheoptimalsizeoftheonlineredologfiles.Whichtoolenablesyoutodeterminetheoptimalsizeoftheonlineredologfiles？（）

A. Oracle Enterprise Manager
B. The V$LOG view
C. The V$LOGFILE view
D. The V$FLASHBACK_DATABASE_LOGS view

单项选择题Inwhichscenariowillyoucreateasortedhashcluster？（）

A. if the application uses queries joining tables only occasionally
B. if the full table scan is executed often on only one table of the clustered tables
C. if the data for all the rows of a cluster key value exceeds one or two Oracle blocks
D. when you want the data to be returned automatically in the chronological order

单项选择题You moved the index EMP_NO_INDX from one tablespace to another and then issued the following command to rebuild the index EMP_NO_INDX：   SQL> ALTER INDEX EMP_NO_INDX REBUILD ONLINE；   Which table allows the users to access the EMP_NO_INDX index while performing the rebuild operation？（）

A. Index-organized table
B. Mapping Table
C. Clustered Table
D. Journal Table