题目内容
（请给出正确答案）
For free space transmission, if the transmi power is
, the receive power is
, and the propagation distance is d, then the correct formulas include a.
, where k is a constant. b.
, where k is a constant. c.
, where k is a constant. d.
, where k is a constant.
A、错
B、对
C、对
D、对
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Using Database Control， you have scheduled a job to shrink the TRANS table residing on the TT tablespace. The job would run at 5：00 p.m. every Friday.
When you examine the space usage of the table after the completion of the job， you find that the table has not been shrunk.
What could have been the reason for this？（）
A. The tablespace that contains the TRANS table is online.
B. The tablespace that contains the TRANS table is permanent.
C. The tablespace that contains the TRANS table is locally managed.
D. The segment space management of the tablespace that contains the TRANS table is manual in nature.
A. An error is produced.
B. The table and all related objects are compacted and the position of the high-water mark (HWM) for the table is adjusted
C. The table and related indexes are compacted but the position of the high-water mark (HWM) for the table remains unchanged
D. The unused space in the table is reclaimed and returned to the tablespace and the data manipulation language (DML) triggers on the table are fired during the shrinking process
How can you free up the space of your digital camera？
A．Get rid of your camera.
B．Copy the pictures to the computer.
C．Use a special computer.
D．Use more film.
A.An entry is created in the alert log file and the database instance continues to function normally
B.The log switch hangs occur for transactions until free space is available in the flash recovery area
C.The Oracle database server deletes a file that is on the obsolete file list to make free space in the flash recovery area Oracle
D.The database instance statusis implicitly changed to RESTRICTED mode and file creations to the flash recovery area are prevented
A. There is demand for space from the new table
B. The undo tablespace does not have sufficient free space
C. The new table name is the same as the table name in the recycle bin
D. The temporary tablespace that is assigned to you does not have sufficient free space
A、reclaim space
B、reduce congestion
C、encourage consumption
D、free up parking
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