THE SGA IS SHARED MEMORY, UPDATED BY ALL SESSIONS; PGAS ARE PRIVATE TO EACH SESSION

1.

þ

C and E. The SGA is shared memory, updated by all sessions; PGAs are

private to each session. The SGA is allocated at startup time (but it can be

modified later).

ý

A, B, and D. A is wrong because it reverses the situation: it is the SGA that

exists in shared memory, not the PGA. B is wrong because sessions write to

both their own PGA and to the SGA. D is wrong because (unlike the SGA) the

PGA is only allocated on demand.