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Code d'Examen: 1Z0-045
Nom d'Examen: Oracle (Oracle database 10g:new features for Oracle8i ocps)
Questions et réponses: 156 Q&As
Code d'Examen: 1Z0-055
Nom d'Examen: Oracle (Oracle Database 11g: New Features for 9i OCPs)
Questions et réponses: 150 Q&As
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NO.1 View the Exhibit exhibit1.
In the CUSTOMERS_OBE table, when the value of CUST_STATE_PROVINCE is "CA", the value of
COUNTRY_ID is "US"
View the Exhibit exhibit2 to examine the commands and query plans.
The optimizer can sense 8 rows instead of 29 rows, which is the actual number of rows in the table. What
can you do to make the optimizer detect the actual selectivity?
A. Set the STATISTICS_LEVEL parameter to TYPICAL.
B. Change the STALE_PERCENT value for the CUSTOMERS_OBE table.
C. Set the OPTIMIZER_USE_PENDING_STATISTICS parameter to FALSE.
D. Create extended statistics for the CUST_STATE_PROVINCE and COUNTRY_ID columns.
Answer: D
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NO.2 While deploying a new application module, the software vendor ships the application software along
with appropriate SQL plan baselines for the new SQLs being introduced. Which two statements describe
the consequences? (Choose two.)
A. The plan baselines can be evolved over time to produce better performance.
B. The newly generated plans are directly placed into the SQL plan baseline without being verified.
C. The new SQL statements initially run with the plans that are known to produce good performance
under standard test configuration.
D. The optimizer does not generate new plans for the SQL statements for which the SQL plan baseline
has been imported.
Answer: AC
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NO.3 Which setting enables the baselines by default in Oracle Database 11g?
A. setting the STATISTICS_LEVEL parameter to TYPICAL
B. adding filters to the Automatic Database Diagnostic Monitor (ADDM)
C. enabling Automated Maintenance Task using Oracle Enterprise Manager
D. setting the OPTIMIZER_USE_PENDING_STATISTICS parameter to TRUE
Answer: A
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NO.4 When executing a SQL workload, you choose to generate execution plans only, without collecting
execution statistics. Which two statements describe the implications of this? (Choose two.)
A. It produces less accurate results of the comparison analysis.
B. It automatically calls the SQL Tuning Advisor for recommendations.
C. It shortens the time of execution and reduces the impact on system resources.
D. Only the changes in the execution plan, and not performance regression, are detected.
Answer: AC
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NO.5 Which two statements are true with respect to the maintenance window? (Choose two.)
A. A DBA can enable or disable an individual task in all maintenance windows.
B. A DBA cannot change the duration of the maintenance window after it is created.
C. In case of a long maintenance window, all Automated Maintenance Tasks are restarted every four
hours.
D. A DBA can control the percentage of the resource allocated to the Automated Maintenance Tasks in
each window.
Answer: AD
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NO.6 In your database, the RESULT_CACHE_MODE parameter has been set to MANUAL in the
initialization parameter file.
You issued the following command:
SQL>SELECT /*+ RESULT_CACHE */ sale_category, sum(sale_amt)
FROM sales
GROUP BY sale_category;
Where would the result of this query be stored?
A. PGA
B. large pool
C. shared pool
D. database buffer cache
Answer: C
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NO.7 You issued the following command:
CREATE GLOBAL TEMPORARY TABLE admin_work_area
(startdate DATE,
enddate DATE,
class CHAR(20))
ON COMMIT DELETE ROWS
TABLESPACE tbs_t1;
An index is then created on the ADMIN_WORK_AREA temporary table.
Which two statements are true regarding the TBS_T1 tablespace in the above command? (Choose two.)
A. It stores only the temporary table but not its indexes.
B. It stores both the temporary table as well as its indexes.
C. It must be a nondefault temporary tablespace for the database.
D. It can be a default or nondefault temporary tablespace for the database.
E. It must be the default temporary tablespace of the user who issues the command.
Answer: BD
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NO.8 Examine the following PL/SQL block:
SET SERVEROUTPUT ON
SET LONG 10000
DECLARE report clob;
BEGIN
report := DBMS_SPM.EVOLVE_SQL_PLAN_BASELINE();
DBMS_OUTPUT.PUT_LINE(report);
END;
Which statement describes the effect of the execution of the above PL/SQL block?
A. The plan baselines are verified with the SQL profiles.
B. All fixed plan baselines are converted into nonfixed plan baselines.
C. All the nonaccepted SQL profiles are accepted into the plan baseline.
D. The nonaccepted plans in the SQL Management Base are verified with the existing plan baselines.
Answer: D
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