多項選擇題

Which three statements are true about logical structures of the Oracle database（）

A.Each segment contains one or more extents.
B.Multiple tablespaces can share a single data file.
C.A data block is the smallest unit of input/output （I/O） in data files.
D.It is possible to have tablespaces of different block sizes in a database.
E.Each data block in the database always corresponds to one operating system block.

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單項選擇題

You have set Tablespace Full Metrics Threshold values for the USERS tablespace as follows： Warning （%）： 90
Critical （%）： 95
Which background process is responsible for issuing alerts when the threshold is crossed（）

A.System monitor （SMON）
B.Process monitor （PMON）
C.Memory manager process （MMAN）
D.Manageability Monitor process （MMON）

多項選擇題

Which two statements about the background process of thedatabase writerare true（）

A.It is possible to have multiple database writers in an Oracle instance.
B.It writes dirty buffers， if any， to data files whenever a checkpoint occurs.
C.It writes dirty buffers， if any， to data files whenever a transaction commits.
D.It writes dirty buffers， if any， to data files before the log writer （LGWR） writes.

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Which three statements are true about logical structures of the Oracle database（）

你可能感興趣的試題

You have set Tablespace Full Metrics Threshold values for the USERS tablespace as follows： Warning （%）： 90 Critical （%）： 95 Which background process is responsible for issuing alerts when the threshold is crossed（）

Which two statements about the background process of thedatabase writerare true（）

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You have set Tablespace Full Metrics Threshold values for the USERS tablespace as follows： Warning （%）： 90
Critical （%）： 95
Which background process is responsible for issuing alerts when the threshold is crossed（）