多项选择题X 纠错
A.The database can have more than one undo tablespace.
B.The UNDO_TABLESPACE parameter is valid in both automatic andmanualundo management.
C.Undo segments automatically grow and shrink as needed, acting as circular storage buffer for their assigned transactions.
D.An undotablespaceis automatically created if the UNDO_TABLESPACEparameter is not set and the UNDO_MANAGEMENT parameter is set to AUTO during the database instance start up.
你可能喜欢
多项选择题
A.committing a transaction
B.flashing back a transaction
C.recovering a failed transaction
D.running a read-consistent query
E.changing a tablespace status from READ ONLY to READ WRITE
多项选择题
A.An extent cannot spread across data files.
B.A segment cannot spread across data files.
C.A data file can belong to only one tablespace.
D.A data file can have only one segment created in it.
E.A data block can spread across multiple data files as it can consist of multiple operating system (OS) blocks.
单项选择题
A.2, 5, 1, 4, 3
B.1, 2, 3, 4, 5
C.5, 2, 1, 3, 4
D.2, 1, 5, 4, 3
单项选择题
A.external table
B.partitioned table
C.partitioned index
D.nonclustered table
E.global temporary table
多项选择题
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.
单项选择题
A.System monitor (SMON)
B.Process monitor (PMON)
C.Memory manager process (MMAN)
D.Manageability Monitor process (MMON)
多项选择题
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
A.Checkpoint (CKPT)
B.Process Monitor (PMON)
C.Archiver Processes (ARCn)
D.Recoverer Process (RECO)
E.Memory Manager process (MMAN)
单项选择题
A.Checkpoint (CKPT): 1, 2, 5
B.System Monitor (SMON): 1, 6
C.Process Monitor (PMON): 4, 6, 7
D.Database Writer (DBWR): 1, 3, 4
单项选择题
A.Archiver Process (ARCn):1, 2,5
B.System Monitor Process (SMON):1,4,5
C.Process Monitor Process (PMON):4,5,6
D.Database Writer Process (DBWn):1,3,4