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单选题
A senior DBA asked you to execute the following command to improve performance: SQL> ALTER TABLE subscribe log STORAGE (BUFFER_POOL recycle); You checked the data in the SUBSCRIBE_LOG table and found that it is a large table containing one million rows. What could be a reason for this recommendation?（）
A
The keep pool is not configured.
B
Automatic Workarea Management is not configured.
C
Automatic Shared Memory Management is not enabled.
D
The data blocks in the SUBSCRIBE_LOG table are rarely accessed.
E
All the queries on the SUBSCRIBE_LOG table are rewritten to a materialized view
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更多 “单选题A senior DBA asked you to execute the following command to improve performance: SQL ALTER TABLE subscribe log STORAGE (BUFFER_POOL recycle); You checked the data in the SUBSCRIBE_LOG table and found that it is a large table containing one million rows. What could be a reason for this recommendation?（）A The keep pool is not configured.B Automatic Workarea Management is not configured.C Automatic Shared Memory Management is not enabled.D The data blocks in the SUBSCRIBE_LOG table are rarely accessed.E All the queries on the SUBSCRIBE_LOG table are rewritten to a materialized view” 相关考题
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多选题our database is in the MOUNT state and you execute the following command to open it： ALTER DATABASE OPEN What two actions are performed as a result of this command？（）AAll control files are opened.BAll redo log files are openedCThe password file is opened.DThe parameter file is opened.EAll online data files are opened.
考题
单选题You issued the following statement： SQLALTER DATABASE ENABLE RESUMABLE TIMEOUT n； What will be the result of issuing the above statement？（）A
The command will not execute successfully because TIMEOUT is an invalid clause with the ALTER DATABASE ENABLE RESUMABLE command.B
The command will not execute successfully because resumable space allocation is enabled at the session level.C
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考题
单选题You execute the following command to start an Automatic Storage Management （ASM） instance： SQLSTARTUP； In which of the following modes will the ASM instance start？（）A
OPENB
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考题
单选题A senior DBA asked you to execute the following command to improve performance: SQL ALTER TABLE subscribe log STORAGE (BUFFER_POOL recycle); You checked the data in the SUBSCRIBE_LOG table and found that it is a large table containing one million rows. What could be a reason for this recommendation?（）A
The keep pool is not configured.B
Automatic Workarea Management is not configured.C
Automatic Shared Memory Management is not enabled.D
The data blocks in the SUBSCRIBE_LOG table are rarely accessed.E
All the queries on the SUBSCRIBE_LOG table are rewritten to a materialized view
考题
单选题As A DBA， which of the following methods can you use to make a backup of your table？（）A
Recover Manager （RMAN） utilityB
Import utilityC
Export utilityD
O/S backup command
考题
单选题Your multitenant container database (CDB) is running in ARCHIVELOG mode. You connect to the CDB RMAN. Examine the following command and its output: You execute the following command: RMAN BACKUP DATABASE PLUS ARCHIVELOG; Which data files will be backed up?（）A
Data files that belong to only the root containerB
Data files that belong to the root container and all the pluggable databases (PDBs)C
Data files that belong to only the root container and PDB$SEEDD
Data files that belong to the root container and all the PDBs excluding PDB$SEED
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The database instance is not available.B
The ALTER TABLE command does not have WAIT optionC
The table or a row in the table is currently locked by another user session.D
The database instance is busy processing other user sessions commands.E
The CUSTOMERS table has no long running query active at the time when this request is made.F
The server process executing the ALTER TABLE command is busy with another command execution
考题
单选题You have lost all your database control files. To recover them， you are going to use the results of the alter database backup controlfile to trace command. Your datafiles and your online redo logs are all intact. Which of the following is true regarding your recovery？（）A
You will need to open the database with the resetlogs command.B
All you need to do is execute the trace file from SQL*Plus and it will perform the recovery for you.C
You will use the resetlogs version of the create controlfile command.D
You will use the noresetlogs version of the create controlfile command.E
You will use the trace file to create a backup control file， and then you will recover the database with the recover database using backup controlfile command
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单选题Consider the MySQL Enterprise Audit plugin. On attempting to start the MySQL service after a crash, notice the following error: [ERROR] Plugin ‘audit_log’ init function returned error. In the audit log file, you notice the final entry: … What action should you take to fix the error and allow the service to start?（）A
Re-install the audit pluginB
Execute the command FLUSH LOGSC
Execute the command SET GLOBAL audit_log_fiush= OND
Move or rename the existing audit.log file
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多选题Your database is running in the ARCHIVELOG mode. You have configured RMAN for backup and recovery operations. You execute the following command from the RMAN prompt： RMAN CONFIGURE CONTROLFILE AUTOBACKUP ON； After executing this command， in which of the following cases will RMAN make an auto-backup of the control file？ （）Awhen you change the name of a datafileBwhen you drop a table from the databaseCwhen you take an export of the databaseDwhen you back up the database using OS utilitiesEwhen you issue an ALTER SYSTEM SWITCH LOGFILE statementFwhen you issue a BACKUP command from inside the RMAN run block
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多选题You work as a database administrator for Supportcenter.cn. Your database is in the MOUNT state and you execute the following command to open it ALTER DATABASE OPEN； What two actions are performed as a result of this command？（）AAll control files are openedBAll redo files are openedCThe password file is openedDThe parameter file is openedEAll online data files are opened
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