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Exam Code: 1z0-064
Exam Name: Oracle Database 12c: Performance Management and Tuning
One year free update, No help, Full refund!
1z0-064 Exam Tests Total Q&A: 84 Questions and Answers
Last Update: 10-05,2015

1z0-064 Free download Detail: 1z0-064 Exam Tests

Exam Code: 1z1-064
Exam Name: Oracle Database 12c: Performance Management and Tuning
One year free update, No help, Full refund!
1z1-064 Real Questions Total Q&A: 84 Questions and Answers
Last Update: 10-05,2015

1z1-064 Braindumps Detail: 1z1-064 Real Questions

NO.1 You observe that queries are performing poorly on the SALES_RECORDS table in your database.
On investigation, you find that at the end of each day the contents of the SALES_RECORDS table are
moved to the SALES_HISTORY table. The delete operations cause the table to be sparsely populated.
The SALES_RECORDS table is created in a tablespace using Automatic Segment Space Management
(ASSM) and row movement is enabled. The table must be accessible 24x7.
Which two tasks would you recommend to improve the performance? (Choose two.)
A. PerformEXPORT, DROP, andIMPORToperations on theSALES_RECORDStable.
B. Shrink theSALES_RECORDStable by using theALTER TABLE...SHRINKSPACEcommand.
C. Move theSALES_RECORDStable to a different location by using theALTER TABLE...MOVEcommand.
D. Deallocate the space in theSALES_RECORDStable by using theALTER TABLE...DEALLOCATE
UNUSEDcommand.
E. Move theSALES_RECORDStable to a tablespace by using manual segment space management.
F. Reorganize theSALES_RECORDStable online by using theDBMS_REDEFINITIONpackage.
Answer: B,D

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NO.2 Which two are prerequisites for running the I/O calibration tool? (Choose two.)
A. The database must be inMOUNTstate.
B. The database should be opened in restricted mode.
C. For determining latency time, theSTATISTICS_LEVELparameter must be set toTYPICALorALL.
D. The disks to be tested must be configured to use asynchronous I/O for data files.
E. The database instance must be started using anSPFILE.
Answer: A,E

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NO.3 Examine the parameters set for your database instance: You are administering a database that
supports an OLTP workload. Users complain about the degraded performance of some queries. While
diagnosing, you notice a large number of hard parses occurring for several syntactically almost
identical SQL statements that differ only in literal values in the WHERE clause.
Which two actions would you recommend to improve performance? (Choose two.)
A. Create theKEEPcache and cache the tables used in the queries.
B. Set theCURSOR_SHARINGparameter toFORCE.
C. Use bind variables instead of literals.
D. Create SQL plan baselines for the almost identical SQL statements and loadthem into the cursor
cache.
E. Set theOPTIMIZER_CAPTURE_SQL_PLAN_BASELINESparameter toTRUE.
Answer: B,E

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NO.4 Which two result in the latest fragmentation within segments and the least external
fragmentation within tablespaces? (Choose two.)
A. automatic segment space managed segments
B. locally managed tablespaces with uniform extent size
C. freelist managed segments with one freelist
D. dictionary managed tablespace
E. locally managed tablespaces that were converted from dictionary managed tablespaces
F. freelistmanaged segments with multiplefreelist
Answer: A,D

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Reference: http://docs.oracle.com/cd/B19306_01/server.102/b14220/logical.htm

NO.5 You are administering a database that supports an OLTP workload. An application regularly
creates global temporary tables and a large number of transactions are performed on them. You
notice that performance is degraded because of excessive generation of undo due to a large number
of transactions on the global temporary tables.
What is the recommended action to improve performance? (Choose the best answer.)
A. Increase the size of the undo tablespace and enable undo retention guarantee.
B. Increase the size of the database buffer cache.
C. Enable temporary undo.
D. Increase the size of the temporary tablespace or make it autoextensible.
E. Enable Automatic Segment Space Management (ASSM) for the undo tablespace.
Answer: A

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Reference:https://docs.oracle.com/cd/B13789_01/server.101/b10739/undo.htm

NO.6 Which two statements are true about ADDM or Real-Time ADDM? (Choose two.)
A. ADDM can be run manually by selecting any range of AWR snapshots available within the AWR
retention period, provided they do not cover a time period when the instances were restarted.
B. ADDM runs in Partial mode to analyze any hung database issues.
C. Real-Time ADDM can proactively detect and diagnose transient performance issues that last for a
few seconds.
D. Real-Time ADDM is automatically invoked by ADDM at the end of every hour.
Answer: B,C

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NO.7 You are administering a database that supports an OLTP workload. CURSOR_SHARING is set to
EXACT for the instance. An application is frequently executing almost identical queries that vary in
literal values in the WHERE clause, causing a large number of hard parses to occur.
Which four statements would be true if you use bind variables for these queries? (Choose four.)
A. Mutex contention in the library cache will be reduced.
B. The optimizer will use one parent cursor and one child cursor for each SQL statement with
different literal values.
C. Hard parses will be reduced for the queries.
D. The optimizer will use bind peeking and subsequent execution of the queries will always generate
the same plans irrespective of the cardinality.
E. The optimizer will generate the same plan for all bind values if no histograms exist on the columns
used in theWHEREclause of these queries.
F. The optimizer will use bind peeking and use the literal value to determine the execution plan for
these queries.
Answer: A,B,C,D

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