81.Evaluate the following command and its output:
SQL>SELECT * FROM dba_temp_free_space;
TABLESPACE_NAME TABLESPACE_SIZE ALLOCATED_SPACE FREE_SPACE
LMTEMP 250609664 101048576 149561088
Which two statements correctly interpret the output? (Choose two.)
A. FREE_SPACE indicates only the space that is currently unallocated.
B. ALLOCATED_SPACE indicates only the space currently allocated and in use.
C. FREE_SPACE indicates only the space that is currently allocated and available for reuse.
D. ALLOCATED_SPACE indicates both the space currently allocated and used, and the space that is available for reuse.
E. FREE_SPACE indicates both the space that is currently allocated and available for reuse, and the space that is currently unallocated.
Answer: DE
参考：http://docs.oracle.com/cd/E11882_01/server.112/e40402/statviews_5062.htm#REFRN23627
DBA_TEMP_FREE_SPACE displays temporary space usage information at tablespace level.
ALLOCATED_SPACE
NUMBER
Total allocated space, in bytes, including space that is currently allocated and used and space that is currently allocated and available for reuse
FREE_SPACE
NUMBER
Total free space available, in bytes, including space that is currently allocated and available for reuse and space that is currently unallocated