多项选择题
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.
相关考题
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单项选择题
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） -
多项选择题
Whichtwostatementsaboutthebackgroundprocessofthedatabasewriteraretrue（）
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. -
单项选择题
View the Exhibit and identify the component marked with a question mark. （）
A.Checkpoint （CKPT）
B.Process Monitor （PMON）
C.Archiver Processes （ARCn）
D.Recoverer Process （RECO）
E.Memory Manager process （MMAN）
