OCP2018最新题库，052新题库及答案整理-25题
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25、Which is true about logical and physical database structures? (Choose the best answer)
? A. An undo tablespace has a temp file instead of a data file.
? B. A segment can consist of extents of different sizes.
? C. A permanent tablespace can only contain tables segments and index segments.
? D. A tablespace can consist of data blocks of different sizes.
? E. An extent always consists of physically contiguous data blocks in storage.
? Correct Answer: B
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