Which two statements are true about the WebLogic Cluster ？（） Clustered Servers capacity can be increased by adding new server instance to the cluster on an existing machine。 Clustered Servers can be on a same or different machine with same operating system only。 Clustered Servers can only be on a same machine or different operating system。 Clustered Servers can be on a same or different machine with same or different operating system。
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Why would you use the following FLASHBACK TABLE command？（） FLASHBACK TABLE emp TO TIMESTAMP （’11：45’.’hh12：mi’）； to undo the changes made to the EMP table since the specified time。 to restore the EMP table that was wrongly dropped from the database。 to view the transactions that have modified the EMP table since the specified time。 to view the changes made to the EMP table for one or more rows since the specified time。
You need to display a very large single-record data block. Since it will be so large, a convenient means of navigation is needed between items. Which type of canvas would you use to display the data block? （） Tab canvas. 。 Pop up canvas. 。 Spread table canvas. 。 Vertical toolbar canvas.。
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What is the effect of specifying the "ENABLE PLUGGABLE DATABASE" clause in a "CREATEDATABASE” statement?（）
