1z0-033 practice exams
filed in Oracle on Mar.10, 2010
Oracle9i Database:Performance Tuning
Exam Number/Code : 1z0-033
Exam Name : Oracle9i Database:Performance Tuning
Questions and Answers : 149 Q&As
1z0-033 Update Time: 2010-03-10
1z0-033 Price: $ 63.00
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1. Why does performance degrade when many UPDATE, INSERT, or DELETE statements are issued on a table that has an associated Bitmap index?
A.Some DML operations re-create the Bitmap index blocks.
B.The Bitmap index is rebuilt automatically after a DML operation.
C.The smallest amount of a bitmap that can be locked is a bitmap segment.
D.Additional time is taken to remove NULL values from the Bitmap index after a DML operation.
Answer: C
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3. You create a stored outline and apply it for use. What strategy would you adopt to verify that the stored outline is being used for a statement?
A.verify OL$,OL$HINTS, and OL$NODES tables after running the statement with USE_STORED_OUTLINES set
B.examine the V$SQL dynamic performance view after running the statement with the USE_STORED_OUTLINES set
C.compare the explain plan output for the statement when running with and without the USE_STORED_OUTLINES set
D.compare the statspack output by taking snaps before and after running the statement with the USE_STORED_OUTLINES set
Answer: C
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