ocp認證052考題解析：1Z0-V8.02-第65題
最新學訊：近期OCP認證正在報名中，因考試人員較多請盡快報名獲取最近考試時間，報名費用請聯系在線老師，甲骨文官方認證，報名從速！
我要咨詢ocp認證052考題解析：1Z0-V8.02-第65題，完整題庫請點擊這里聯系老師咨詢了解
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
答案解析：
A.當重做日志文件太小的情況下，會頻繁的切換日志，檢查點信息寫入數據文件的頻率會增加而不是減少。A錯。
B.在正常關庫，會生成完全檢查點，CKPT會讓DBWn進程將所有已經提交的都寫進數據文件，B對。
C.頻繁的發生檢查點會增加I/O的讀寫次數，造成數據庫性能的下降，故C對。
D.CKPT是將重做信息寫進重做日志里，DBWn是將數據寫進數據文件，而不是CKPT.D錯。
