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An application writes to a log

题目

An application writes to a log file in the /logs filesystem that is full. After the log file is deleted, 'df' still shows the filesystem as 100% full. What is the likely cause of the problem and what will resolve it?（）

  • A、The deleted file is still open by the application.The system must be rebooted before'df' will show the reduction in the filesystem.
  • B、The deleted file is still open by the application.The application must be stoppedbefore 'df' will show the reduction in the filesystem.
  • C、The filesystem is still marked as full in the /etc/fs.status file.The system must be rebooted before 'df' will show the reduction in the filesystem.
  • D、The filesystem is still marked as full in the /etc/fs.status file.The application must be stopped before 'df' will show the reduction in the filesystem.
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相似问题和答案

第1题：

A TCP/IP application is transferring files from a personal machine to a remote machine.  The application writes 32 kilobytes of data at a time to the socket， but has not issued a system call to set the window size.  Which of the following procedures should be performed on the personal machine to increase the throughput of the application？（）

  • A、 Increase the size of thewall
  • B、 Increase the size of sb_max
  • C、 Increase the size of tcp_recvspace
  • D、 Increase the size of tcp_sendspace

正确答案:D

第2题：

As part of fallover testing of a corporate database server， client application connectivity must be  verified. Which of the following would best verify the application functionality？（）  

  • A、 Perform a ping client verification test.
  • B、 Review the number of active application processes.
  • C、 Perform successful reads and writes to the application.
  • D、 Run netstat -an to verify client connections to the listening ports.

正确答案:C

第3题：

Full Atomicity, Consistency, Isolation, Durability (ACID) compliance is a necessity for a new application, which heavily reads and writes data.This requires the following config file options: Sync_binlog=1 Innodb_flush_log_at_trx_commit=1 Innodb_doublewrite=1 However, this configuration is expected to introduce disk I/O overhead.What three changes will reduce disk I/O overheads?（）

A.Use of soft links for database directories on the same physical disk

B.Use of delay_key_write=ON for batch index update

C.Allocation of RAM to the buffer pool such that more of the data can fit in RAM

D.Placement of InnoDB log files and datadir on separate physical disks

E.Use of separate directories on the same physical disk for log files and data files


参考答案：B, C, D

第4题：

Which two statements about the background process of thedatabase writerare true（） 

  • A、It is possible to have multiple database writers in an Oracle instance.
  • B、It writes dirty buffers， if any， to data files whenever a checkpoint occurs.
  • C、It writes dirty buffers， if any， to data files whenever a transaction commits.
  • D、It writes dirty buffers， if any， to data files before the log writer （LGWR） writes.

正确答案:A,B

第5题：

Which two statements about the background process of the database writer are true（）

  • A、It is possible to have multiple database writers in an Oracle instance.
  • B、It writes dirty buffers， if any， to data files whenever a checkpoint occurs.
  • C、It writes dirty buffers， if any， to data files whenever a transaction commits.
  • D、It writes dirty buffers， if any， to data files before the log writer （LGWR） writes

正确答案:A,B

第6题：

After installing WebSphere Commerce，the WebSphere Application Server fails to start.  Which log file will help determine if WebSphere Application Server was installed correctly？（）

  • A、<WAS_installdir>/logs/log.txt 
  • B、<WC_installdir>/logs/install_date_time.log 
  • C、<WAS_installdir>/logs/<WC_instance_name>/SystemOut.log 
  • D、<WC_installdir>/instances/<instance_name>/xml/<instance_name>.xml 
  • E、<WAS_installdir>/logs/serverStatus.log

正确答案:A

第7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

正确答案:D

第8题：

You are analyzing the components of the redo log mechanisms in your Oracle database. Which of the following purposes does the CKPT process serve?（）

  • A、Writes buffers to disk 
  • B、Writes current redo log number to datafile headers 
  • C、Writes redo log information to disk 
  • D、Reads information into memory for users

正确答案:B

第9题：

Which background process reads the redo log buffer and writes it to a file？（）

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

正确答案:D

第10题：

The online redo log group configuration for your database is as follows： What will happen if the online redo log file ’ora02/oradata/redo02b.log’is corrupted while working on the database？（） 

  • A、 The database will hang.
  • B、 The database will be crashed.
  • C、 The database will be shut down.
  • D、 The LGWR process writes redo log entries to the other redo log member of the Group2 group

正确答案:D

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