Choose three.In which three situatio

多选题 Choose three.
In which three situations can you use threshold server-generated alerts to help diagnose and fix problems?

A、 when free space in a dictionary managed tablespace falls below a specified percentage

B、 when free space in a locally managed tablespace falls below a specified percentage

C、 when the total number of locked user account exceeds a specific value

D、 when the number of logons per second exceeds a specific value

E、 when a resumable statement is suspended

F、 when the total number of logons exceeds a specific value

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多选题 For which two requirements can you use the USER_TABLESPACE clause with the CREATE PLUGGABLE DATABASE command? (Choose two.、

A、 to specify a default tablespace in a PDB cloned from another PDB in the same CDB.

B、 to exclude all tablespaces except SYSTEM, SYSAUX, and TEMP when plugging in a PDB

C、 to include specific user tablespaces only when relocating a PDB

D、 to specify the list of user tablespaces to include when moving a non-CDB to a PDB

E、 to exclude a temp tablespace when plugging in a PDB

F、 to specify the list of tablespaces to include when creating a PDB from the CDB seed

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多选题 Which three are true about requirements for various FLASHBACK operations? (Choose three.、

A、 FLASHBACK transaction query requires undo to retrieve all versions of a row that existed
Between two points in time.

B、 FLASHBACK drop requires that the RECYCLEBIN parameter be set to ON.

C、 FLASHBACK version query requires that the RECYCLEBIN parameter be set to ON.

D、 FLASHBACK DATA ARCHIVE requires undo to store all versions of all rows of a table being tracked.

E、 FLASHBACK drop requires undo to retrieve all versions of a row that existed between two points
In time.

F、 FLASHBACK version query requires undo to retrieve all versions of a row that existed between
Two points in time.

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多选题 Examine the statements that use flashback technologies:

1 FLASHBACK TABLE customers TO TIMESTAMP TO_TIMESTAMP('2013-02-04 09:30:00', 'YYYY-

MM-DD HH:MI:SS'、;

2 SELECT * FROM customers AS OF SCN 123456;

3FLASHBACK TABLE customers TO BEFORE DROP;

4FLASHBACK DATABASE TO TIMESTAMP TO_TIMESTAMP('2013-02-04 09:30:00', 'YYYY-MM-DD

HH:MI:SS'、;

5SELECT * FROM customers VERSIONS BETWEEN SCN 123456 AND 123999;

6ALTER TABLE customers FLASHBACK ARCHIVE;

Which set of statements depends on the availability of relevant undo data in the undo tablespace?

A、

1,3,6

B、

1,2,5

C、

3,4,5

D、

2,3,5,6

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多选题 Which three are true about thresholds, metrics, and server-generated alerts? (Choose three.)

A、 All metrics are instance related.

B、 Cleared stateful alerts are displayed by querying DBA_ALERT_HISTORY.

C、 A space usage management alert is automatically cleared after the underlying problem is
Resolved.

D、 They are generated by SMON when a tablespace is 97% full.

E、 Metrics are statistical counts for a specific unit.

F、 STATISTICS_LEVEL must be set to ALL to generate alerts.

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多选题 While backing up to an SBT channel, you determine that the read phase of your compressed Recovery Manager (RMAN） incremental level 0 backup is a bottleneck.

FORCE LOGGING is enabled for the database.

Which two could improve read performance? (Choose two.、

A、

Increase the size of tape I/O buffers.

B、

Disable FORCE LOGGING for the database.

C、

Increase the size of the database buffer cache.

D、

Enable asynchronous disk I/O.

E、 Increase the level of RMAN multiplexing.

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多选题 Which two are prerequisites for performing Flashback Transaction?

A、 Fast Recovery Area must be enabled for the database.

B、 The EXECUTE privilege must be granted to a user on the DBMS_FLASHBACK package.

C、 Undo retention guarantee must be configured for the database.

D、 A supplemental log must be enabled for the primary key.

E、 Row movement must be enabled.

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多选题 choose one

You enable Flashback Data Archive for a table for which you want to track and save all transactions

For four years. After some time, the requirement changes for keeping transactions from four to two

Years.

You execute the following command to change the requirement:

SQL> ALTER FLASHBACK ARCHIVE fdal MODIFY RETENTION 2 YEAR;

What is the outcome?

A、

All historical data older than two years, if any, is purged from the flashback archive FDA1.

B、

An error is returned because the retention period cannot be reduced.

C、

All the flashback data archives are purged and the subsequently created flashback archives are maintained for two years.

D、

All historical data older than two years, if any, is archived to flashback logs and the flashback Archive is set to new retention time.

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多选题 Which three statements are true about Flashback Data Archive?

A、

To use Flashback Data Archive, users must have unlimited quota on the Flashback Data Archive Tablespace.

B、

To enable Flashback Data Archive for a table, it is mandatory to have a default Flashback Data Archive for a database.

C、

While enabling Flashback Data Archive for a table, if no name is provided for Flashback Data Archive, it is enabled using the default Flashback Data Archive.

D、

A table enabled for Flashback Data Archive cannot be dropped unless Flashback Data Archive is Disabled or disassociated first.

E、 Flashback Data Archive prevents flashback queries from getting a snapshot-too-old error.

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