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In your database，the STATISTICS_LEVEL initialization parameter is set to BASIC. What is the impact of this setting？（）
A . The optimizer statistics are collected automatically.
B . Only the timed operating system （OS） statistics and plan execution statistics are collected.
C . The Oracle server dynamically generates the necessary statistics on tables as part of query optimization.
D . The snapshots for the Automatic Workload Repository （AWR） are not generated automatically.
E . Snapshots cannot be collected manually by using DBMS_WORKLOAD_REPOSITORY PACKAGE.
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If you create your database using Oracle Managed Files （OMF）， what is true？（）
A . You must use Oracle predefined names to identify raw partitions that will hold OMF structures.
B . You must define directories for two online redo log groups and three copies of the control file.
C . If your CREATE DATABASE command fails, any OMF database files that have already been created will be dropped automatically.
D . You must use only OMF data files when adding new tablespaces or data files to your database in the future.
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Your database is running in ARCHIVELOG mode,and the database is open. You execute an RMAN backup and specify the KEEP clause.Which components are backed up when this option is specified?（）
A . only the control file, the current SPFILE, and data files
B . only the current SPFILE and data files if autobackup is disabled
C . only the data files and the archived redo logs
D . the control file, current SPFILE file, data files, and archived redo log
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You work as a database administrator for Certkiller .com. According to your backup strategy， you performed an incremental level 0 backup of your database. Which statement regarding this backup is true？（）
A . The backup is similar to image copy.
B . The backup contains all used data blocks.
C . The backup contains only unused data blocks.
D . The backup contains all data blocks changed since the last incremental level 1 backup.
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You work as a database administrator for Certkiller .com. The UNDO_RETENTION parameter in your database is set to 1000 and undoretention is not guaranteed. Which statement regarding retention of undo data is correct？（）
A . Undo data becomes obsolete after 1，000 seconds.
B . Undo data gets refreshed after 1，000 seconds.
C . Undo data will be stored permanently after 1，000 seconds.
D . Committed undo data would be retained for 1，000 seconds if free undo space is available.
E . Undo data will be retained in the UNDOtablespacefor 1，000 seconds， then it gets movedmovedto the TEMPORARYtablespaceto provide read consistency.
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You have lost datafile 4 from your database. Which is typically the fastest way to restore your database? （）
A . Restore and recover the datafile.
B . Restore and recover the tablespace.
C . Restore and recover the database.
D . Restore and recover the control file.
E . Restore and recover the parameter file.
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According to your backup strategy， you performed an incremental level 0 backup of your database. Which statement regarding this backup is true？（）
A . The backup is similar to image copy.
B . The backup contains all used data blocks.
C . The backup contains only unused data blocks.
D . The backup contains all data blocks changed since the last incremental level 1 backup.
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You are designing the physical database layout on your host machine. What is the relationship between tablespaces and datafiles in the Oracle database?（）
A . One tablespace has only one datafile
B . Many tablespaces can share one datafile
C . One tablespace can have many datafiles
D . One datafile can contain many tablespace
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Your database is functioning in ARCHIVELOG mode. In which two situations would you perform a cancelbased recovery？（）
A . You find that one of the redo log members in each redo log group is lost.
B . You find that a data file that belongs to the USERS tablespace is damaged.
C . You find that a data file that belongs to the SYSTEM tablespace is damaged.
D . You find that the current redo log group is damaged and is not available for recovery.
E . You realized while performing a recovery that an archived redo log file needed for recovery is lost.
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Your Oracle Database 10g is online when you execute the following statement： SQL>ALTER TABLESPACE MY_TABLESPACE FLASHBACK OFF； What is the result of executing this statement if the Flashback Database feature is already enabled in the database？（）
A . The database does not record flashback logs for MY_TABLESPACE
B . The tables residing in MY_TABLESPACE are not protected by the Recycle Bin.
C . All the tablespaces except MY_TABLESPACE can be recovered using Flashback Database feature.
D . None of the flashback technologies， such as Flashback Table， Flashback Transaction Query and Flashback Version Query can be used to recover individual rows within the objects from MY_TABLESPACE
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Your test database is running in NOARCHIVELOG mode. What are the implications of this？ （）
A . You can perform open database backups.
B . You can perform closed database backups.
C . You cannot perform schema-level logical backups.
D . You can perform the backup of only the SYSTEM tablespace when the database is open.
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Your database is in NOARCHIVELOG mode. After which two operations you should take the backup of control file？（）
A . adding a new user to the database
B . dropping a user from the database
C . dropping a table from the database
D . dropping a data file from a tablespace
E . adding a new tablespace to the database
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Your database is functioning in NOARCHIVELOG mode. Your database contains 15 tablespaces. You want to use Recovery Manager （RMAN） to perform backups. Which two backups would you be able to perform when the database is being accessed by users？（）
A . Backup of offline tablespaces.
B . Backup of read-only tablespaces.
C . Backup of system-critical tablespaces.
D . Backup of online， locally managed tablespaces.
E . Backup of read/write dictionary-managed tablespaces.
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Examine the parameter setting in your database:
https://assets.asklib.com/images/image2/2018080215045780340.jpg
Which statement is correct about the database?（）
A . Automatic memory management is disabled because PGA_AGGREGATE_TARGET and SGA_TARGET are not set
B . The instance is started but the database will not be opened until PGA_AGGREGATE_TARGET and SGA_TARGET are set
C . The database is opened but users cannot perform transactions until PGA_AGGREGATE_TARGET and SGA_TARGET are set
D . Automatic memory management is enabled and, as per policy, 60% of the memory for System Global Area (SGA) and 40% of the memory for Program Global Area (PGA) will be distributed at startu
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Your database is configured on non-ASM disk storage. You need to migrate your database to ASM disk storage. Which statement is true about migrating from non-ASM disk storage to ASM disk storage？（）
A . You can use the operating system utility to migrate from non-ASM disk storage to ASM disk storage.
B . You cannot perform a database backup from non-ASM disk storage to tape and then move it to ASM disk storage.
C . You can use the SWITCH DATABASE TO COPY Recovery Manager （RMAN） command to switch back to non-ASM disk storage if you have not deleted your original datafiles.
D . You cannot use Recovery Manager （RMAN） to migrate from non-ASM disk storage to ASM disk storage if you are not using RMAN for your backup and recovery strategies.
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In your database， the STATISTICS_LEVEL initialization parameter is set to BASIC. What is the impact of this setting？（）
A . The optimizer statistics are collected automatically.
B . Only the timed operating system （OS） statistics and plan execution statistics are collected.
C . The Oracle server dynamically generates the necessary statistics on tables as part of query optimization.
D . The snapshots for the Automatic Workload Repository （AWR） are not generated automatically.
E . Snapshots cannot be collected manually by using DBMS_WORKLOAD_REPOSITORY PACKAGE.
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Your database is running in NOARCHIVELOG mode. You want to put the database in ARCHIVELOG mode. Which two statements regarding archive log destinations are true？（）
A . The destination must be global only.
B . A maximum of five destinations can be assigned.
C . A maximum of ten different destinations can be assigned.
D . All the destinations are determined by the server automatically.
E . The destination may be local or remote for a Standby Database.
F . The destination can be changed by setting the LOG_ARCHIVE_FORMAT initialization parameter.
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You have lost datafile 4 from your database. Which is typically the fastest way to restore your database？（）
A . Restore and recover the datafile.
B . Restore and recover the tablespace.
C . Restore and recover the database.
D . Restore and recover the control file.
E . Restore and recover the parameter file.
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Your database is running in ARCHIVELOG mode， and the database is open. You execute an RMAN backup and specify the KEEP clause. Which components are backed up when this option is specified？（）
A . only the control file， the current SPFILE， and data files
B . only the current SPFILE and data files if autobackup is disabled
C . only the data files and the archived redo logs
D . the control file，current SPFILE file，data files，and archived redo log
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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？（）
A . The database instance aborts.
B . The database operation temporarily halts till the member becomes available.
C . Writing proceeds as normal. LGWR writes to the available members of a group and ignores the unavailable members.
D . The member would be marked as STALE and an error message would be written to the alert log file and LGWR trace file.
E . The status of the group changes to INACTIVE and an error message would be written to the alert log file and LGWR trace file.
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in your database instance， the STATISTICS_LEVEL initialization parameter is set to BASIC. What is the impactof this setting（）
A . Optimizer statistics are collected automatically.
B . Only timed operating system （OS） statistics and plan execution statistics are collected.
C . The snapshots for the Automatic Workload Repository （AWR） are not generated automatically.
D . Snapshots cannot be collected manually by using the DBMS_WORKLOAD_REPOSITORY package.
E . The Oracle server dynamically generates the necessary statistics on tables as part of query optimization.
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You work as a database administrator for Supportcenter.cn. Your database is opened inNOARCHIVEKLOG mode. You decide to place the database in ARCHIVELOG mode. How would you do this？（）
A . Execute the ALTER DATABASE ARCHIVELOG statement
B . Select ARCHIVELOG option in the database control and restart the database to apply the changes.
C . Shut down and start the instance， and in the NOMOUNT state execute the ALTER DATABASE ARCHIVELOG statement.
D . Shut down and start the instance， mount the database， then execute the ALTER DATABASE ARCHIVELOG statement.
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Flashback is enabled for your multitenant container database （CDB), which contains two plu
Flashback is enabled for your multitenant container database (CDB), which contains two pluggable database (PDBs). A local user was accidently dropped from one of the PDBs.You want to flash back the PDB to the time before the local user was dropped. You connect to the CDB and execute the following commands:SQL ＞ SHUTDOWN IMMEDIATE SQL ＞ STARTUP MOUNT SQL ＞ FLASHBACK DATABASE to TIME TO_DATE (‘08/20/12’ , ‘MM/DD/YY’)”;Examine following commands:1. ALTER PLUGGABLE DATABASE ALL OPEN;2. ALTER DATABASE OPEN;3. ALTER DATABASE OPEN RESETLOGS;Which command or commands should you execute next to allow updates to the flashback back schema？（）
A. Only 1
B. Only 2
C. Only 3
D. 3 and 1
E. 1 and 2
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In your database, the flash recovery area （FRA) is configured as the default for RMAN back
In your database, the flash recovery area (FRA) is configured as the default for RMAN backups. You executed the following commands to configure the settings in RMAN:Which statement is true about the outcome？（）
<img src='https://img2.soutiyun.com/ask/uploadfile/2019-03-27/4f3f38f4fa50f6813beecdb37f5e123f.jpg' />
A. Only one channel is allocated and the backup is created in the flash recovery area
B. Only one channel is allocated and the backup is created in the destination specified for channel
C. Two channels are allocated and backup sets are created in the destinations specified for channels 1 and 2
D. Three channels are allocated and backup sets are created in the destinations specified for channels 1, 2, and FRA
