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READ Free Dumps For Oracle- 1z0-117





Question ID 2556

Examine the Following Query and execution plan:
 
 
Which query transformation technique is used by the optimizer?

Option A

A.    Filter push down
 

Option B

B.    Subquery factoring
 

Option C

C.    Subquery unnesting

 

Option D

D.    Predicate pushing

Correct Answer D
Explanation


Question ID 2557

Examine the Exhibit and view the structure of an indexes for the EMPLOYEES table.
 
Which two actions might improve the performance of the query?

Option A

A.    Use the ALL_ROWS hint in the query.
 

Option B

B.    Collect the histogram statistics for the EMPLOYEE_ID column.
 

Option C

C.    Decrease the value for the DB_FILE_MULTIBLOCK_READ_COUNT initialization parameter.
 

Option D

D.    Decrease the index on the EMPLOYEE_ID if not being used.

 

Option E

E.    Set the OPTIMIZER_MODE parameter to ALL_ROWS.

Correct Answer A,E
Explanation

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