Multiple choice

Which of the following sequences is correct?

  1. Extent -> data block -> segment

  2. Data block -> extent -> segment

  3. Segment -> data block -> extent

  4. Segment -> extent -> data block
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Oracle's logical storage hierarchy builds from smallest to largest: data blocks are the smallest unit (typically 2-32KB), extents are collections of contiguous data blocks, and segments are collections of extents that store a specific object type. Therefore the correct sequence is: data block → extent → segment.

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