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计算机考试 | Oracle认证考试

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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 ()

A

The database automatically determines the extent-sizing policy for the tablespace.

B

The segments are automatically shrunk when the contents are removed from them.

C

The allocation of extents within the tablespace is managed through the dictionary tables.

D

The space utilization description of the data blocks in segments is recorded inbitmapblocks.

E

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()

A

You can perform consistent backups only.

B

You can perform a complete database backup without shutting down the database instance.

C

You can back up data files only when all data files have the same SCN recorded in the control file.

D

You can back up only those data files whose headers are frozen by using ALTER TABLESPACE BEGINBACKUP or ALTER DATABASE BEGIN BACKUP commands.

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()

A

An Automatic Workload Repository snapshot has been taken recently.

B

The non-threshold-based alerts are transferred to DBA_ALERT_HISTORY.

C

The threshold alerts conditions are cleared and the alerts are transferred to DBA_ALERT_HISTORY.

D

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()

A

Automatic statistics collection is stopped for the CUSTOMERS table.

B

Statistics for the CUSTOMERS table are locked and cannot be overwritten.

C

Existing statistics for the CUSTOMERS table become unusable for the query optimizer.

D

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()

A

The MTTR advisor will be disabled.

B

Automatic checkpoint tuning will be enabled.

C

The value for the LOG_CHECKPOINT_INTERVAL initialization parameter will be override the value forFAST_START_MTTR_TARGET.

D

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()

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.

单选题 In which situation would you use static database registration for a listener()

A

when multiple databases are to be registered with the listener

B

when DBAs need to connect remotely to start up the database instance

C

when users need to connect the database instance using the host naming method

D

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()

A

The SGA_TARGET is a static parameter.

B

The instance is started, but the database is not yet open.

C

The server parameter file (SPFILE) was used to start the instance.

D

The SGA_TARGET parameter does not have any effect onthe databaseinstance untiltheSGA_MAX_SIZE parameter is specified.

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