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多选题 You need to ensure that the database users should be able to use the various flashback query features in order to go back in time by four hours. What would you do to achieve this?()

A

set SQL_TRACE=True 

B

set UNDO_RETENTION=14400 

C

set FAST_START_MTTR_TARGET=240 

D

set LOG_CHECKPOINT_INTERVAL=240 

E

set DB_FLASHBACK_RETENTION_TARGET=14400 

F

set the RETENTION GUARANTEE clause for the undo tablespace

单选题 You want to perform the database backup when user activity on your system is low, such as between 12:00 a.m. and 2:00 am. Which command terminates with an error if the backup is not complete at the end of the specified duration?()

A

RMAN> BACKUP DURATION 2:00 MINIMIZE LOAD DATABASE

B

RMAN> BACKUP DURATION 2:00 PARTIAL FILESPERSET 1 DATABASE

C

RMAN> BACKUP DURATION 2:00 PARTIAL MINIMIZE TIME DATABASE 

D

RMAN> BACKUP AS COPY DURATION 2:00 PARTIAL MINIMIZE LOAD DATABASE

单选题 You have three production databases, HRDB, FINDB, and ORGDB, that use the same ASM instance. At the end of the day, you execute the following command on the ASM instance to shut down: SQL> shutdown immediate; What is the result of executing this command?()

A

All the instances, including the ASM instance, are shut down in the ABORT mode

B

The ASM instance is shut down, but the other instances are still running 

C

The ASM instance is still functional, but the other instances are shut down 

D

All the instances, including the ASM instance, are shut down in the IMMEDIATE mode. 

E

HRDB, FINDB, and ORGDB instances are shut down in the ABORT mode and the ASM instance is shut down in the IMMEDIATE mode 

F

HRDB, FINDB, and ORGDB instances are shut down in the NORMAL mode and the ASM instance is shut down in the IMMEDIATE mode

单选题 The system was running a normal workload during the last 24 hours. You need to ensure that with the same workload you should be able to flashback tables by three hours. What would you do to find the system recommendations for the undo retention period and the undo tablespace size?()

A

set DB_FLASHBACK_RETENTION_TARGET=10800  

B

create a new scheduler window for the time period of 24 hours and use the optimizer statistics 

C

modify the Automatic Workload Repository (AWR) snapshot time interval to three hours and use ADDMfindings 

D

specify New Undo Retention as three hours and Analysis Time period as Last One Day in the Undo Advisor page and use its recommendations

单选题 You have 100 segments in the USERS tablespace. You realize that the USERS tablespace is running low on space. You can use Segment Advisor to().

A

add data files to the tablespace 

B

identify the segments that you should shrink 

C

modify the storage parameters for the tablespace 

D

automatically shrink the segments with unused space 

E

check the alerts generated for the tablespace that is running low on space

单选题 An online tablespace, TEST_TBS, is full and you realize that no server-managed tablespace threshold alerts were generated for the TEST_TBS tablespace. What could be the reason, if the TEST_TBS tablespace does not include autoextensible data files?()

A

TEST_TBS is a small file tablespace 

B

TEST_TBS is a bigfile tablespace (BFT)

C

TEST_TBS is the default temporary tablespace

D

TEST_TBS is a dictionary-managed tablespace

E

Threshold values for the TEST_TBS tablespace are not explicitly specified

单选题 You have three temporary tablespace groups named G1, G2, and G3 in your database. You are creating a new temporary tablespace as follows: CREATE TEMPORARY TABLESPACE TEMP1 TEMPFILE /u1/data/temp1.dbf SIZE 10M TABLESPACE GROUP ;Which statement regarding the above command is correct?()

A

It will create the tablespace TEMP1 in group G1

B

It will create the tablespace TEMP1 in group G3 

C

It will not add the tablespace TEMP1 to any group

D

It will create the tablespace TEMP1 in the default group

E

It will throw an error with message 'specified group is not available

F

It will create a new group with a system-generated name and add the tablespace TEMP1 to it.

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