You have the following online redo log configuration：  
 Group       Member  
1     ’/disk1/oradata/redo01a.log’  
2     ’/disk2/oradata/redo02a.log’  
3     ’/disk3/oradata/redo03a.log’  
You decide to multiplex the online redo log groups for recovery of redo log files in case of any disaster. Which two statements will you NOT issue to multiplex the online redo log files？（）

单项选择题YouaremaintainingyourOLTPdatabaseinOracle10g.YouhavenotsetthewarninglevelandcriticallevelthresholdvaluesforspaceusageoftheDATA1tablespace.Whatwillbetheimpact？（）

A. No warning level or critical level alert will be generated.
B. A warning level alert will never be generated， but a critical level alert will be generated when 97 percent space of the DATA1 tablespace is used.
C. A critical level alert will never be generated， but a warning level alert will be generated when 85 percent space of the DATA1 tablespace is used.
D. A warning level alert will be generated at 85 percent space usage of the DATA1 tablespace， and a critical level alert is generated at 97 percent space usage of the DATA1 tablespace.

单项选择题You issued the following statement to monitor the usage of the index：        SQL> ALTER INDEX SCOTT.EMP_IDX MONITORING USAGE；   Which view will you query to ensure that the index is being monitored？（）

A. INDEX_STATS
B. DBA_INDEXES
C. DBA_IND_COLUMNS
D. V$OBJECT_USAGE

单项选择题You discover an out-of-space condition in the database. You decide to suspend a session for five minutes. You issue the following command to suspend the session：   ALTER SESSION ENABLE RESUMABLE；   Which command could you issue to enable the resumable space allocation feature at the session level？（）

A. ALTER SESSION ENABLE RESUMABLE_TIMEOUT = 5；
B. ALTER SYSTEM ENABLE RESUMABLE_TIMEOUT = 5；
C. ALTER SESSION ENABLE RESUMABLE_TIMEOUT = 300；
D. ALTER SYSTEM ENABLE RESUMABLE TIMEOUT = 300；

单项选择题YouareusingOracleEnterpriseManagertoestimatethesizeofatabletobecreated.Youhavetypeddataregardingthecolumnnames，datatypes，sizesofthecolumns，andtheprojectednumberofrowsinthetable.WhichadditionalinformationdoestheOracleEnterpriseManagerreturn？（）

A. space allocated in the tablespace
B. space required for the bitmap index on a column of the table
C. space remaining in the tablespace after creating the table
D. estimated value of the PCTFREE storage parameter

单项选择题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？（）

A. Issue the ALTER TABLE SCOTT.DEPT SHRINK SPACE COMPACT； statement.
B. Issue the ALTER TABLE SCOTT.DEPT SHRINK SPACE； statement.
C. Issue the ALTER TABLE SCOTT.DEPT SHRINK SPACE CASCADE； statement.
D. You cannot shrink the SCOTT.EMP table.