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Question ID 2376

You notice a high number of waits for the db file scattered read and db file sequential read events in the recent Automatic Database Diagnostic Monitor (ADDM) report. After further investigation, you find that queries are performing too many full table scans and indexes are not being used even though the filter columns are indexed.
Identify three possible reasons for this.
 

Option A

A.    Missing or stale histogram statistics
 

Option B

B.    Undersized shared pool

 

Option C

C.    High clustering factor for the indexes
 

Option D

D.    High value for the DB_FILE_MULTIBLOCK_READ_COUNT parameter
 

Option E

E.    Oversized buffer cache

Correct Answer A,C,D
Explanation


Question ID 2377

Which three features work together, to allow a SQL statement to have different cursors for the same statement based on different selectivity ranges?
 

Option A

A.    Bind Variable Peeking
 

Option B

B.    SQL Plan Baselines
 

Option C

C.    Adaptive Cursor Sharing
 

Option D

D.    Bind variable used in a SQL statement

 

Option E

E.    Literals in a SQL statement

Correct Answer A,C,E
Explanation

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