单选题 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()
Archiver Process (ARCn):1, 2,5
System Monitor Process (SMON):1,4,5
Process Monitor Process (PMON):4,5,6
Database Writer Process (DBWn):1,3,4
多选题 You executed the following command to create a tablespace called SALES_DATA: > CREATE TABLESPACE sales_data DATAFILE SIZE 100M SEGMENT SPACE MANAGEMENT AUTO; Which two statements are true about the SALES_DATA tablespace ()
The database automatically determines the extent-sizing policy for the tablespace.
The segments are automatically shrunk when the contents are removed from them.
The allocation of extents within the tablespace is managed through the dictionary tables.
The space utilization description of the data blocks in segments is recorded inbitmapblocks.
The space utilization description of the data blocks in segments is managed through free lists.MANUAL
多选题 You are working on a database that must be functioning 24 hours a day, 7 days a week. The databaseis configured in ARCHIVELOG mode. Which two options do you have for performing user-managed backups()
You can perform consistent backups only.
You can perform a complete database backup without shutting down the database instance.
You can back up data files only when all data files have the same SCN recorded in the control file.
You can back up only those data files whose headers are frozen by using ALTER TABLESPACE BEGINBACKUP or ALTER DATABASE BEGIN BACKUP commands.
多选题 View the Exhibit and examine the initialization parameter settings. Which three initialization parameters are to be set manually as they are not automatically tuned()
LOG_BUFFER
SORT_AREA_SIZE
JAVA_POOL_SIZE
STREAMS_POOL_SIZE
DB_16K_CACHE_SIZE
DB_KEEP_CACHE_SIZE
单选题 View the Exhibit to examine the output of the DBA_OUTSTANDING_ALERTS view. After 30 minutes, you executed the following command: SQL> SELECT reason,metric_value FROM dba_outstanding_alerts; REASON METRIC_VALUE ------------------------------------------------------------ ------------ Tablespace [TEST] is [28 percent]full 28.125 What could be the reason for the elimination of the other rows in the output()
An Automatic Workload Repository snapshot has been taken recently.
The non-threshold-based alerts are transferred to DBA_ALERT_HISTORY.
The threshold alerts conditions are cleared and the alerts are transferred to DBA_ALERT_HISTORY.
The threshold alerts related to database metrics are permanently stored in DBA_ALERT_HISTORY but not the threshold alerts related to instance metrics.
单选题 Examine the command: SQL> DBMS_STATS.SET_TABLE_PREFS(’SH’, ’CUSTOMERS’, ’PUBLISH’, ’false’); Which statementdescribes the effect of the above command()
Automatic statistics collection is stopped for the CUSTOMERS table.
Statistics for the CUSTOMERS table are locked and cannot be overwritten.
Existing statistics for the CUSTOMERS table become unusable for the query optimizer.
Subsequently, statistics gathered on the CUSTOMERS table are stored as pending statistics
多选题 Which two statements are true about setting the FAST_START_MTTR_TARGET initialization parameter to anonzero value()
The MTTR advisor will be disabled.
Automatic checkpoint tuning will be enabled.
The value for the LOG_CHECKPOINT_INTERVAL initialization parameter will be override the value forFAST_START_MTTR_TARGET.
The time taken to recover the instance after the crash is always exactly the same as the value given for theinitialization parameter.
单选题 In your database instance, the STATISTICS_LEVEL initialization parameter is set to BASIC. What isthe impact of this setting()
Optimizer statistics are collected automatically.
Only timed operating system (OS) statistics and plan execution statistics are collected.
The snapshots for the Automatic Workload Repository (AWR) are not generated automatically.
Snapshots cannot be collected manually by using the DBMS_WORKLOAD_REPOSITORY package.
The Oracle server dynamically generates the necessary statistics on tables as part of query optimization.
单选题 In which situation would you use static database registration for a listener()
when multiple databases are to be registered with the listener
when DBAs need to connect remotely to start up the database instance
when users need to connect the database instance using the host naming method
when the database instance that is to be registered with the listener is configured in shared server mode
单选题 View the Exhibit and examine the output of the query. What do you infer from this()
The SGA_TARGET is a static parameter.
The instance is started, but the database is not yet open.
The server parameter file (SPFILE) was used to start the instance.
The SGA_TARGET parameter does not have any effect onthe databaseinstance untiltheSGA_MAX_SIZE parameter is specified.
在任何情况下,伸缩调节器处轨距的要求为()。
人类有两套影响学习的记忆系统:陈述性记忆和程序记忆。陈述性记忆是对事实或者词汇之类基本认识的记忆。而程序记忆,就是一个人“不劳而获”的记忆。程序记忆是人养成习惯和习得技巧的方式,比如骑自行车。在很多时候,这种学习是无意识的。人们用早期发育的程序记忆系统来学习复杂的东西,比如语法规则。帮助人们学习词汇的陈述性记忆系统,则需要更多时问完成发育。儿童拥有程序记忆系统,并且不受陈述性记忆系统的干扰。由此可以推出()。
宋末元初四大家
公平目标的实现可以通过()实现。
荟萃分析
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预防HIV感染的主要措施应当为( )
简述我国混合型债券市场的发展状况。
造成水中某些污染物在生物体内含量大大高于水体中的浓度的生物放大作用是指()
输血的适应证中,不包括()