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Code d'Examen: 1Z0-533
Nom d'Examen: Oracle (Oracle Hyperion Planning 11 Essentials)
Questions et réponses: 71 Q&As
Code d'Examen: 1Z0-054
Nom d'Examen: Oracle (Oracle Database 11g: Performance Tuning)
Questions et réponses: 192 Q&As
Code d'Examen: 1Z0-202
Nom d'Examen: Oracle (Siebel 8 Consultant Exam)
Questions et réponses: 146 Q&As
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NO.1 You plan to use adaptive thresholds as part of the performance tuning activity. You decide to increase
the window size of the default moving window baseline for all metric observations and comparisons in
your database. The following error occurs when you try to increase the window size through Enterprise
Manager:
Failed to commit: ORA-13541: system moving window baseline size (1296000) greater than retention
(1036800) ORA-06512: at "SYS.DBMS_WORKLOAD_REPOSITORY", line 601 ORA-06512: at line 2
Which action would allow you to perform the preceding task successfully?
A. increasing the flashback retention period
B. increasing the retention period for SQL Management Base
C. increasing the undo retention period for the database instance
D. increasing the Automatic Workload Repository (AWR) retention period
ANSWER: D
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NO.2 View the Exhibit and examine a portion of the output obtained from the following query:
SQL> SELECT * FROM v$sys_time_model;
Select three correct interpretations of the time model statistics. (Choose three.)
A. DB time includes the wait time of all the nonidle and idle user sessions.
B. SQL execute elapsed time includes the time spent in performing fetches of query results.
C. DB CPU includes the CPU time spent on database user-level calls and background CPU time.
D. SQL execute elapsed time includes components of the hard parse elapsed time like bind elapsed time.
E. DB time includes the connection management call elapsed time excluding the background process
time.
ANSWER: BDE
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NO.3 View the Exhibit exhibit1 to examine the series of SQL commands and parameter settings.
View the Exhibit exhibit2 to examine the plans available in the SQL plan baseline.
The first plan (in red) is created when OPTIMIZER_MODE is set to ALL_ROWS and the second plan (in
blue) is created when OPTIMIZER_MODE is set to FIRST_ROWS.
Which SQL plan baseline would be used if the SQL query in exhibit1 is executed again when the value of
OPTIMIZER_MODE is set to FIRST_ROWS?
A. the second plan, because it is a fixed plan
B. the first plan, because it is an accepted plan
C. the second plan, because it is the latest generated plan in FIRST_ROW mode
D. A new plan, because the second plan in FIRST_ROW mode is not an accepted plan
ANSWER: B
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NO.4 After running SQL Performance Analyzer (SPA), you observe a few regressed SQL statements in the
SPA output. Identify the two actions that you would suggest for these regressed SQL statements.
(Choose two.)
A.Running SQL Access Advisor
B.Adding them to SQL Plan Baseline
C.Submitting them to SQL Tuning Advisor
D.Running Automatic Database Diagnostic Monitor (ADDM)
ANSWER: BC
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NO.5 View Exhibit1 and examine the indexes on the CUSTOMERS table.
The statistics for the CUSTOMERS table have been updated recently by using the following command:
SQL> EXEC DBMS_STATS.GATHER_TABLE_STATS('SH','CUSTOMERS',method_opt=>'FOR ALL
INDEXED COLUMNS SIZE AUTO');
View Exhibit2 to examine a query plan. Even though the index is present on the COUNTRY_ID and
CUST_GENDER columns, the query uses a full table scan. What could be the reason?
A. because the histogram statistics for the COUNTRY_ID column are not updated
B. because the DB_FILE_MULTIBLOCK_READ_COUNT initialization parameter is set to a high value
C. because the optimizer calculates the cost of accessing blocks by using a full table scan to be less as
compared to index scans, even though indexes are available
D. because indexes on CUST_GENDER and COUNTRY_ID columns are of different types, the index on
the CUST_GENDER column is bitmap index, and on COUNTRY_ID columns is btree index.
ANSWER: C
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NO.6 A batch workload that historically completed in the maintenance window between 10:00 PM and
midnight is currently showing poor performance and completing at 2 AM.
To help in the diagnosis of the performance degradation, the senior DBA in your organization asks you to
execute the awrddrpt.sql script to produce a Compare Periods report.
Which two statements are true about the report produced by this script? (Choose two.)
A. It is refreshed automatically based on the moving window baseline.
B. It compares details between any two selected time periods of the same duration.
C. It normalizes the statistics by the amount of time spent on the database for each time period.
D. It compares details between two consecutive time periods of the same or different durations and is
refreshed every 60 minutes.
ANSWER: BC
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NO.7 View Exhibit1 to examine the description of the CUSTOMERS table.
The CUSTOMERS table has been updated heavily today. In a frequently used SQL statement, you notice
that estimated rows and the actual number of rows fetched differ greatly. The COUNTRY_ID column has
an index.
View Exhibit2 and examine the query execution plan.
What would you recommend to improve the optimizer's estimation?
A. setting the STATISTICS_LEVEL parameter to ALL
B. setting the OPTIMIZER_USE_PENDING_STATISTICS parameter to FALSE
C. creating extended statistics for the CUST_LAST_NAME, CUST_ID, and CUST_TOTAL columns
D. updating the statistics for the CUSTOMERS table by using the
DBMS_STATS.GATHER_TABLE_STATS
procedure
ANSWER: D
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NO.8 You work as a DBA for a company and you have the responsibility of managing one of its online
transaction processing (OLTP) systems. The database encountered performance-related problems and
you generated an Automatic Workload Repository (AWR) report to investigate it further.
View the Exhibits and examine the AWR report.
What could be the problem in this database?
A.Java pool is not configured.
B.The CPU in the system is slow.
C.The shared pool size is inadequate.
D.The database buffer cache is inadequate.
E.The OPEN_CURSORS parameter is set to a small value.
ANSWER: C
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