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单选题
The Log Writer (LGWR) process reads information from the ()and writes it to the online logs.
A

large pool

B

shared pool

C

data buffer cache

D

redo log buffer

E

data dictionary cache


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考题 单选题Which background process sequentially writes Flashback Database data from the flashback buffer to the Flashback Database logs?()A  DBWnB  RECOC  RVWRD  LGWR

考题 单选题A media failure has occurred. This has resulted in all the members of the next hop log group being rendered inaccessible to the log writer process (LGWR) at a log switch. How does this failure affect the operational database?()A  The database re-created the missing redo log files automatically.B  The database continues to function normally with the existing files.C  The database allows only queries, no other statements are allowed.D  The database returns and error and the database instance shuts down.E  The user sessions that generate redo logs are terminated automatically.

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考题 多选题Your production database is running in the ARCHIVELOG mode and the ARCn process is functional. You have two online redo log groups. Which three background processes would be involved when a log switch happens? ()AarchivalBlog writerCdatabase writerDsystem monitorEprocess monitorFchange tracking writer

考题 多选题In your database, the Log Writer (LGWR) process is unable to write to a member of a current redo log group due to read/write failure. Which two effects would you see in your database?()AThe database instance aborts.BThe database operation temporarily halts till the member becomes available.CWriting proceeds as normal. LGWR writes to the available members of a group and ignores the unavailable members.DThe member would be marked as STALE and an error message would be written to the alert log file and LGWR trace file.EThe status of the group changes to INACTIVE and an error message would be written to the alert log file and LGWR trace file.