Home » Oracle » 1z0-515 » Which index type is most likely to be used to improve the performance of some queries where the data is of low cardinality?
You will be implementing a data warehouse for one of your customers. In your design process, which index type is most likely to be used to improve the performance of some queries where the data is of low cardinality?
A. Bitmap indexes
B. B*-tree indexes
C. Reverse indexes
D. Invisible indexes
Correct Answer: A
Explanation/Reference:
Explanation:
http://www.toadworld.com/Newsletter/TWPIPELINEJanFeb2010/PIPEJanFeb10Oracle/tabid/672/Default.aspx
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