OCP 1Z0 052 65

65. Which two statements are true about checkpointing? (Choose two.) 
A.The checkpoint frequency decreases with the smaller redo log file size. 
B.It ensures that all committed data is written to the data files during normal shutdown. 
C.The  frequent  full  checkpoint  in  a  database  can  cause  the  overall  degradation  of  the  database performance. 
D.It prompts  the Checkpoint  (CKPT) process  to write data  to  the data  files and  redo  information  to  the 
online redo log files. 
Answer: BC

A、说反了。应该是 redo log file越小，checkpoint越频繁
D、CKPT does not write data blocks to data files or redo blocks to online redo log files.