IBM
A2090-614 · Question #47
A2090-614 Question #47: Real Exam Question with Answer & Explanation
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Question
Which statement about block indexes is correct?
Options
- ABecause of their large size, block indexes are extremely efficient.
- BBlock indexes improve performance when data is not clustered on sequential pages.
- CPrefetching of data pages relies on sequential detection when block indexes are used.
- DThe records for each block are retrieved using a mini-relational scan of saved data pages.
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