A: Awhen row directories need more row entries
B: Bwhen there is row migration in the data block
C: Cwhen there is an increase in the PCTFREE value for the data block
D: Dwhen more transaction slots are required than are initially configured
举一反三
- Identify two situations in which the block header grows in a data block. （） A: when row directories need more row entries B: when there is row migration in the data block C: when there is an increase in the PCTFREE value for the data block D: when more transaction slots are required than are initially configured
- 下面关于数据块（data block）的说法错误的是（）？ A: data block是Oracle存储数据的最小单位 B: 不可以在同一个数据库中指定多个不同的data block大小 C: db_block_size参数控制默认的data block大小 D: 数据存储在data block中
- 14 In triple sequence table of sparse matrix, each triple represents ( ). A: the row number,column number and data value of non-zero elements in the matrix B: the data value of non-zero elements in the matrix C: the row and column numbers of elements in the matrix D: the row number,column number and data value of elements in the matrix
- Which of the following statement is not ture? A: ANOVA can be used to compare the mean of two samples B: Completely random design is more suitable for the data of the experimental subject's mixed influence is not too big C: In random block design, the number of columns in each block is equal to the number of treatments D: In random block design, the smaller the difference within and between blocks, the better
- DB_BLOCK_SIZE初始化参数的度量单位是（）。 A: BLOCK B: BYTE C: PAGE D: ROW
内容
- 0
Which of the following is not an essential factor of a block?() A: Previous block header hash B: Time stamp C: Index value D: Cryptographic hash
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A（）is a named momory block . By using its name, we can refer to the data stored in the memory block. A: word B: record C: program D: variable
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Which styles of business letters are more popular in emails according to this lecture? ( ). A: Simplified styleIndented style B: Block style C: Modified block style
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manual block A: block controlled manually by a person known as a block operator. B: a fixed signal that lets engineers know if a train can enter a block.
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In which three situations is incomplete recovery required？（） A: AAfter a shutdown abort. B: BWhen recovering to an SCN. C: CWhen recovering until a specific time. D: DWhen a required archived log is missing.