网友您好， 请在下方输入框内输入要搜索的题目：
题目内容
（请给出正确答案）
多选题
You performed an incremental level 0 backup of a database: RMAN > BACKUP INCREMENTAL LEVEL 0 DATABASE; To enable block change tracking after the incremental level 0 backup, you issued this command: SQL > ALTER DATABASE ENABLE BLOCK CHANGE TRACKING USING FILE ‘ /mydir/rman_change_track.f’; To perform an incremental level 1 cumulative backup, you issued this command: RMAN> BACKUP INCREMENTAL LEVEL 1 CUMULATIVE DATABASE; Which three statements are true?（）
A
Backup change tracking will sometimes reduce I/O performed during cumulative incremental backups.
B
The change tracking file must always be backed up when you perform a full database backup.
C
Block change tracking will always reduce I/O performed during cumulative incremental backups.
D
More than one database block may be read by an incremental backup for a change made to a single block.
E
The incremental level 1 backup that immediately follows the enabling of block change tracking will not read the change tracking file to discover changed blocks.
参考答案
参考解析
解析：
暂无解析
更多 “多选题You performed an incremental level 0 backup of a database: RMAN BACKUP INCREMENTAL LEVEL 0 DATABASE; To enable block change tracking after the incremental level 0 backup, you issued this command: SQL ALTER DATABASE ENABLE BLOCK CHANGE TRACKING USING FILE ‘ /mydir/rman_change_track.f’; To perform an incremental level 1 cumulative backup, you issued this command: RMAN BACKUP INCREMENTAL LEVEL 1 CUMULATIVE DATABASE; Which three statements are true?（）ABackup change tracking will sometimes reduce I/O performed during cumulative incremental backups.BThe change tracking file must always be backed up when you perform a full database backup.CBlock change tracking will always reduce I/O performed during cumulative incremental backups.DMore than one database block may be read by an incremental backup for a change made to a single block.EThe incremental level 1 backup that immediately follows the enabling of block change tracking will not read the change tracking file to discover changed blocks.” 相关考题
考题
单选题Examine the following command:ALTER SYSTEM SET enable_ddl_logging=FALSE;Which statement is true?（）A
None of the data definition language (DDL) statements are logged in the trace file.B
Only DDL commands that resulted in errors are logged in the alert log file.C
A new log.xml file that contains the DDL statements is created, and the DDL command details are removed from the alert log file.D
Only DDL commands that resulted in the creation of new database files are logged.
考题
多选题Which three statements are true about SQL plan directives?（）AThey are tied to a specific statement or SQL id.BThey instruct the maintenance job to collect missing statistics or perform dynamic sampling to generate a more optimal plan.CThey are used to gather only missing statistics.DThey are created for a query expression where statistics are missing or the cardinality estimates by the optimizer are incorrect.EThey instruct the optimizer to create only column group statistics.FImprove plan accuracy by persisting both compilation and execution statistics in the SYSAUX tablespace.
考题
多选题You execute the following piece of code with appropriate privileges: User SCOTT has been granted theCREATE SESSION privilege and the MGR role.Which two statements are true when a session logged in as SCOTT queries the SAL column in the viewand the table?（）AData is redacted for the EMP.SAL column only if the SCOTT session does not have the MGR role set.BData is redacted for EMP.SAL column only if the SCOTT session has the MGR role set.CData is never redacted for the EMP_V.SAL column.DData is redacted for the EMP_V.SAL column only if the SCOTT session has the MGR role set.EData is redacted for the EMP_V.SAL column only if the SCOTT session does not have the MGR role set.
考题
单选题In your multitenant container database (CDB) containing pluggable databases (PDB), users complain about performance degradation. How does real-time Automatic database Diagnostic Monitor (ADDM) check performance degradation and provide solutions?（）A
It collects data from SGA and compares it with a preserved snapshot.B
It collects data from SGA, analyzes it, and provides a report.C
It collects data from SGA and compares it with the latest snapshot.D
It collects data from both SGA and PGA, analyzes it, and provides a report
考题
单选题To implement Automatic Management (AMM), you set the following parameters: When you try to start the database instance with these parameter settings, you receive the following error message: SQL startup ORA-00824: cannot set SGA_TARGET or MEMORY_TARGET due to existing internal settings, see alert log for more information. Identify the reason the instance failed to start.（）A
The PGA_AGGREGATE_TARGET parameter is set to zero.B
The STATISTICS_LEVEL parameter is setto basic.C
Both the SGA_TARGETandMEMORY_TARGET paramete rsareset.D
The SGA_MAX_SIZEandSGA_TARGET parameter value sare note qual.
考题
多选题Which two are true concerning a multitenant container database with three pluggable database?（）AAll administration tasks must be done to a specific pluggable database.BThe pluggable databases increase patching time.CThe pluggable databases reduce administration effort.DThe pluggable databases are patched together.EPluggable databases are only used for database consolidation.
考题
多选题You want to flash back a test database by five hours.You issue this command:SQL FLASHBACK DATABASE TO TIMESTAMP (SYSDATE - 5/24);Which two statements are true about this flashback scenario?（）AThe database must have multiplexed redo logs for the flashback to succeed.BThe database must be MOUNTED for the flashback to succeed.CThe database must use block change tracking for the flashback to succeed.DThe database must be opened in restricted mode for the flashback to succeed.EThe database must be opened with the RESETLOGS option after the flashback is complete.FThe database must be opened in read-only mode to check if the database has been flashed back to the correct SCN.
考题
多选题Which three statements are true about Automatic Workload Repository (AWR)?（）AAll AWR tables belong to the SYSTEM schema.BThe AWR data is stored in memory and in the database.CThe snapshots collected by AWR are used by the self-tuning components in the databaseDAWR computes time model statistics based on time usage for activities, which are displayed in the v$SYS time model and V$SESS_TIME_MODEL views.EAWR contains system wide tracing and logging information.
考题
多选题Which three statements are true about Automatic Workload Repository (AWR)?（）AAll AWR tables belong to the SYSTEM schema.BThe AWR data is stored in memory and in the database.CThe snapshots collected by AWR are used by the self-tuning components in the databaseDAWR computes time model statistics based on time usage for activities, which are displayed in the v$SYS time model and V$SESS_TIME_MODEL views.EAWR contains system wide tracing and logging information.
考题
多选题Examine the details of the Top 5 Timed Events in the following Automatic Workloads Repository (AWR)report:What are three possible causes for the latch-related wait events?（）AThe size of the shared pool is too small.BCursors are not being shared.CA large number COMMITS are being performed.DThere are frequent logons and logoffs.EThe buffers are being read into the buffer cache, but some other session is changing the buffers.
考题
多选题You performed an incremental level 0 backup of a database: RMAN BACKUP INCREMENTAL LEVEL 0 DATABASE; To enable block change tracking after the incremental level 0 backup, you issued this command: SQL ALTER DATABASE ENABLE BLOCK CHANGE TRACKING USING FILE ‘ /mydir/rman_change_track.f’; To perform an incremental level 1 cumulative backup, you issued this command: RMAN BACKUP INCREMENTAL LEVEL 1 CUMULATIVE DATABASE; Which three statements are true?（）ABackup change tracking will sometimes reduce I/O performed during cumulative incremental backups.BThe change tracking file must always be backed up when you perform a full database backup.CBlock change tracking will always reduce I/O performed during cumulative incremental backups.DMore than one database block may be read by an incremental backup for a change made to a single block.EThe incremental level 1 backup that immediately follows the enabling of block change tracking will not read the change tracking file to discover changed blocks.
热门标签
最新试卷