选择题 3.  Identify the memory component from which memory may be allocated for:
    1.Sessionmemoryforthe shared server
    2.Buffers for I/O slaves
    3. Oracle Database Recovery Manager(RMAN) backup and restore operations
【正确答案】 A
【答案解析】 题目中的3项均是大池(Large Pool)的适用场景。所以,本题的答案为A。