单选题Which background process is responsible for writing the dirty buffers from the write list to the data files during a checkpoint？（）A CKPTB SMONC LGWRD DBWnE ARCn

第1题：

Which Oracle background process is responsible for providing information about the instance name associated with the service handlers and services to the listener？（）

• A、PMON
• B、SMON
• C、LGWR
• D、CKRT

第2题：

Which statement is true regarding the Archiver （ARCn） process，archived log files，and recovery？ （）

• A、A database backup, combined with archived redo log files, guarantees that all committed data can be recovered to the point of failure. 
• B、During recovery the ARCn background process copies its redo entries identified for recovery by the control file to the data files. 
• C、After each write to an archived log, the mandatory background process ARCn writes its log sequence number and the first and last SCN number within the log sequence to the control file. 
• D、At database recover time, and archived redo log is uniquely identified for recovery use by its redo thread number and destination ID number retrieved from the control file.

第3题：

第4题：

You are maintaining an OLTP database in Oracle10g. You find that the database is generating a large number of trace files. You decide to disable the trace files generated by the ARCn background process.  Which action will enable you to disable the trace files generated by the ARCn background process？（）  

• A、 Remove the LOG_ARCHIVE_DEST parameter from the init.ora file.
• B、 Set the value of the SQL_TRACE parameter to FALSE in the init.ora file.
• C、 Use the DBMS_MONITOR.SESSION_TRACE_DISABLE procedure.
• D、 Set the value of the LOG_ARCHIVE_TRACE initialization parameter to zero.

第5题：

Which Oracle background process frees SGA resources that were allocated to a user process that failed？（）

• A、PMON
• B、SMON
• C、CKPT
• D、LGWR
• E、ARCn

第6题：

Which background process sequentially writes Flashback Database data from the flashback buffer to the Flashback Database logs？（）

• A、 DBWn
• B、 RECO
• C、 RVWR
• D、 LGWR

第7题：

Which  statements are true about checkpointing（）

• 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 onlineredo log files

第8题：

第9题：

Which background process does Automatic Shared Memory Management use to coordinate the sizing of memory components？（）

• A、PMON
• B、SMON
• C、MMNL
• D、MMAN
• E、MMON

第10题：

Note the following functionalities of various background processes：  1：Record the checkpoint information in data file headers. CKPT  2：Perform recovery at instance startup. SMON  3：Cleanup unused temporary segments. SMON  4：Free the resources used by a user process when it fails.  5：Dynamically register database services with listeners.  6：Monitor sessions for idle session timeout.  Which option has the correct functionalities listed for a background process（）

• A、Archiver Process （ARCn）：1， 2，5
• B、System Monitor Process （SMON）：1，4，5
• C、Process Monitor Process （PMON）：4，5，6
• D、Database Writer Process （DBWn）：1，3，4