You work as a ...

单项选择题You work as a database administrator at Certkiller .com. You are working in an online transaction processing （OLTP） environment. You realize that the salary for an employee， John， has been accidentally modified in the EMPLOYEEStable. Two days ago， the data was in the correct state. Flashback logs generated during last two days are available in the flash recovery area. Which option would you choose to bring the data to the correct state while ensuring that no other data in the same table is affected？（）

A. perform point-in-time recovery
B. perform a Flashback Table operation to restore the table to the state it was in two days ago
C. perform a Flashback Database operation to restore the database to the state it was in two days ago
D. perform Flashback Versions Query and Flashback Transaction Query to determine all the necessary undo SQL statements， and then use them for recovery

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1.单项选择题 You defined the Recovery Manager （RMAN） retention policy to recovery window of 7 days by executing the following command：
RMAN> CONFIGURE RETENTION POLICY TO RECOVERY WINDOW OF 7 DAYS；
When a backup is performed， what would be the status of this backup after seven days？（）

A. The backup would be marked as invalid.
B. The backup would be marked as obsolete.
C. The backup would be removed from the media.
D. The backup would be removed from the RMAN repository.

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2.单项选择题The warning and critical threshold values have been set to 85% and 97%， respectively， for one of the tablespaces. The current tablespace space usage is 54%. You modify the warning threshold to be 50 % and critical threshold to be 53% in Database Control. Which statement is true？（）

A. The new setting would be applied but no alerts would be raised immediately.
B. The new setting would be applied and an alert would be raised immediately.
C. The new setting would be ignored because the tablespace space usage is more than the specified threshold value.
D. The new setting would cause an error because the tablespace space usage is more than the specified threshold value.

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3.单项选择题 Exhibit： Using Database Control， you have scheduled a job to shrink the TRANStable residing on the TTtablespace. The job would run at 5：00 p.m. every Friday.When you examine the space usage of the table after the completion of the job， you find that the table has not been shrunk. What could have been the reason for this？（）

A. The tablespace that contains the TRANS table is online.
B. The tablespace that contains the TRANS table is permanent.
C. The tablespace that contains the TRANS table is locally managed.
D. The segment space management of the tablespace that contains the TRANS table is manual in nature.

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4.单项选择题 You executed the following command in Recovery Manager （RMAN）：
RMAN> RESTORE CONTROLFILE；
Which operation must you perform before this command is executed？（）

A. back up the control file to trace
B. bring database to the MOUNT state
C. open a connection to the RMAN recovery catalog， which contains the RMAN metadata for the target database
D. set the database ID （DBID）， but only if the DB_NAME parameter associated with the target database is unique in the recovery catalog

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5.单项选择题 A user executes a query on the EMPtable， which contains thousands of rows， to get details about employees in one of the departments. The user receives the following error：
SQL> SELECT ename FROM emp WHERE deptno=10 ORDER BY sal；
SELECT ename FROM emp WHERE deptno=10 ORDER BY sal
ERROR at line 1：
ORA-01157： cannot identify/lock data file
201 - see DBWR trace file ORA-01110： data file 201：’/u01/app/oracle/oradata/orcl/temp01.dbf’
What is a possible reason？（）

A. The tempfile belonging to the default temporary tablespace is missing.
B. The database is opened in restricted mode， so queries are not allowed
C. The default temporary tablespace required to execute the query is offline.
D. The default temporary tablespace required to execute the query is dropped.
E. The default temporary tablespace required to execute the query is read-only.

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6.多项选择题 You have created a resource plan， PROD_DB_PLAN， with the following consumer groups with the respective plan directives：
Consumer group SALESwith CPU_P1as 60 and DEGREE_OF_PARALLELISMas 4.
Consumer group MARKETwith CPU_P1as 20.
Consumer group DEVwith CPU_P1as 20.
Consumer groupOTHERSwith CPU_P1as 0 and CPU_P2as 100.
Which two statements are correct in this scenario？（）

A. The maximum degree of parallelism for the members of the consumer groups is 4.
B. The CPU allocation will always be equal for the consumer groups MARKET and DEV.
C. The OTHERS consumer group would get 100% of the CPU if there are unused level 1 CPU resources.
D. The SALES and MARKET consumer groups would get 100% of the CPU if there are unused level 2 CPU resources.
E. The maximum degree of parallelism for the members of the consumer group SALES is 4 with no restriction for the remaining groups.

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7.单项选择题You find that the execution time of reports in your datawarehouse application is significantly high. You suspect the lack of indexes to be the reason for the degradation in performance. Which advisory component would you refer to， in order to determine the appropriate indexes？（）

A. Memory Advisor
B. Segment Advisor
C. SQL Access Advisor
D. Automatic Workload Repository （AWR）
E. Automatic Database Diagnostic Monitor （ADDM）

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8.单项选择题There was media failure and you need to check the data files for any block corruption. Which option would you use to create a report on any corruptions found within the database？（）

A. the DBNEWID utility
B. the DBVERIFY utility
C. the ANALYZE command
D. the RMAN REPORT command
E. the RMAN CROSSCHECK command
F. the CHECK_OBJECT procedure of the DBMS_REPAIR package

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9.多项选择题The loss of which two types of files may require a recovery with the RESETLOGS option？（）

A. control files
B. password file
C. archived log files
D. system-critical data files for which all the redo entries are present
E. non-system-critical data files for which all the redo entries are present

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10.多项选择题You want to use the SQL Tuning Advisor to generate recommendations for badly written SQL statements in your development environment. Which three sources can you select for the advisor to analyze？（）

A. Top SQL
B. snapshots
C. SQL Tuning sets
D. index access path
E. optimizer statistics
F. materialized view logs

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