MEMORY_MAX_TARGET=0
MEMORY_TARGET=500M
PGA_AGGREGATE_TARGET=90M
SGA_TARGET=270M
Which two statements are true regarding these parameters after the database instance is restarted?(Choose two.)
A. The MEMORY_MAX_TARGET parameter is automatically set to 500 MB.
B. The value of the MEMORY_MAX_TARGET parameter remains zero till it is changed manually.
C. The PGA_AGGREGATE_TARGET and SGA_TARGET parameters are automatically set to zero.
D. The lower bounds of PGA_AGGREGATE_TARGET and SGA_TARGET parameters are set to 90 MB and 270 MB, respectively.
答案：（A、D）