283.You set the following parameters in the parameter file and restarted the database: 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.
正确答案是AD