47题、choose one

Your database instance is started with a PFILE.

Examine the parameters:

NAME TYPE VALUE

memory_max_target big integer 0

memory_target big integer 0

sga_max_size big integer 2G

sga_target big integer 2G

You want to increase the size of the buffer cache. Free memory is available to increase the size of

the buffer cache.

You execute the command:

SQL> ALTER SYSTEM SET DB_CACHE_SIZE=1024M;

Which is the outcome?

A) The value is changed for the current instance and in the PFILE.

B) It fails because the SCOPE clause is missing.

C) The value is changed only in the PFILE and takes effect at the next instance startup.

D) Change is applied to the current instance, but does not persist after instance restart.

Answer：A

(解析：这个参数是动态参数，默认是当前实例和spfile都修改。来自3组：1015267481)