---

Which is the correct description of a pinned buffer in the database buffer cache（）
A:The buffer is currently being accessed.
B:The buffer is empty and has not been used.
C:The contents of the buffer have changed and must be flushed to the disk by the DBWn process. 
D:The buffer is a candidate for immediate aging out and its contents are synchronized with the block contents on the disk.

---

出自：Oracle认证

显示答案