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Exam : Oracle 1Z0-033
Title : Oracle 9I Database:Performance Tuning


1. When tuning a database server, which three goals should you focus on? (Choose three.)
A.minimize response time for OLTP users
B.maximize throughput for batch processing
C.minimize response time for batch processing
D.increase load capability for the decision-support systems
E.minimize parallelism for online transaction processing (OLTP) systems
Answer: ABD

2. Smith is a DBA with ABC Corp. He is in the process of tuning the database. He has received various problem statements from the customers. Identify three appropriately defined problem statements that Smith can use to tune the database correctly. (Choose three.)
A.The system is too slow.
B.Online response is very slow.
C.Sometimes the batch process throws errors.
D.The weekly backup took 30 minutes, and earlier it used to take 5 minutes.
E.The batch process is taking 2 hours, whereas it should take only 30 minutes.
F.The system currently has 100 users. We wish to increase the number of users to 250. The users' response time should not be affected.
Answer: DEF

3. You have reserved memory within the Shared Pool by using the SHARED_POOL_RESERVED_SIZE parameter to accommodate large space allocations while compiling PL/SQL blocks and database triggers.
While observing the performance of the reserved area, you find that the value of the REQUEST_FAILURES column in the V$SHARED_POOL_RESERVED view is continuously increasing.
Which statement is true in this scenario?
A.The parsing of the statement fails due to invalidations.
B.The execution of the statement fails due to invalidations.
C.The space allocated for the reserved area is not enough.
D.The syntax in the PL/SQL blocks is causing the compilation failure.
Answer: C

4. Which two activities would adversely affect database performance? (Choose two.)
A.doing a soft parse
B.performing archiving
C.less frequent checkpointing
D.defining multiple buffer pools
E.taking online back up of data files
Answer: BE

5. Why does performance degrade when many UPDATE, INSERT, or DELETE statements are issued on a table that has an associated Bitmap index?
A.Some DML operations re-create the Bitmap index blocks.
B.The Bitmap index is rebuilt automatically after a DML operation.
C.The smallest amount of a bitmap that can be locked is a bitmap segment.
D.Additional time is taken to remove NULL values from the Bitmap index after a DML operation.
Answer: C

6. A customer has various dictionary-managed tablespaces with past data. The extents in dictionary-managed tablespaces are not uniformly sized. Newly created tablespaces are locally managed. You want to make all the tablespaces locally managed. What approach would you use to change the dictionary-managed tablespaces to locally managed tablespaces to get all the performance benefits of local extent management?
A.use only the DBMS_SPACE_ADMIN.TABLESPACE_MIGRATE_TO_LOCAL procedure
B.create new locally managed tablespaces and move data from existing dictionary-managed tablespaces to locally managed tablespaces
C.use the DBMS_SPACE_ADMIN.TABLESPACE_MIGRATE_TO_LOCAL procedure, followed by DBMS_SPACE_ADMIN.TABLESPACE_FIX_SEGMENT_STATES
D.use the ALTER TABLESPACE command to change extent management to local, and then use the DBMS_SPACE_ADMIN.TABLESPACE_MIGRATE_TO_LOCAL procedure
Answer: B

7. You need to size the KEEP pool. Which calculation would you use to determine the initial size of the KEEP pool?
A.50% of the DEFAULT pool
B.50% of the RECYCLE pool
C.the total number of blocks of all the candidate objects that you need in the KEEP pool / the number of objects that you need in the KEEP pool
D.total number of blocks of all the candidate objects that you need in the KEEP pool + additional space to allow for object growth
Answer: D

8. ABC Corp. has an online transaction processing (OLTP) system that has just gone into production. The system was rigorously tested during the development phases.
What is the first recommended activity that the DBA should perform before starting to monitor the performance of the system on a regular basis?
A.running SQL*Trace
B.collecting baseline statistics
C.analyzing indexes and user tables
D.arranging meetings with users once each two weeks to discuss performance
Answer: B

9. ABC Corp. plans to build an online transaction processing (OLTP) system. The company plans to tune all the components during the development life cycle.
From the list given below, identify the order in which the components should be tuned.
1: logical and physical model
2: cursor sharing
3: Oracle instance memory structures
4: operating system
5: data file I/O
A.1, 2, 3, 5, 4
B.1, 3, 2, 4, 5
C.1, 2, 3, 4, 5
D.1, 2, 5, 3, 4
Answer: A

10. You create a stored outline and apply it for use. What strategy would you adopt to verify that the stored outline is being used for a statement?
A.verify OL$,OL$HINTS, and OL$NODES tables after running the statement with USE_STORED_OUTLINES set
B.examine the V$SQL dynamic performance view after running the statement with the USE_STORED_OUTLINES set
C.compare the explain plan output for the statement when running with and without the USE_STORED_OUTLINES set
D.compare the statspack output by taking snaps before and after running the statement with the USE_STORED_OUTLINES set
Answer: C

11. Smith is a DBA with XYZ Corp. There are 500 data entry users in an online transaction processing (OLTP) environment. The current response time is 15-20 seconds. The company wants the response time to be brought down to 10 seconds or less.
What is the first thing that Smith should do to diagnose the cause of the slow response time?
A.determine whether there is contention for locks
B.determine whether the file system is fast enough
C.determine whether more memory needs to be allocated to PGA
D.determine whether more memory needs to be allocated to SGA
E.determine whether the slow response is wait bound or CPU bound
Answer: E

12. View the Exhibit.
In your database, you find that the fy05q1 table in a dictionary managed tablespace has excess space. Further, you find that the table consists of three extents. The size of the first extent is 100KB, the second is 200KB, and the third is 300K. The high water mark is in the middle of the second extent, and there is 400KB of unused space.
You want to release the unused space so that it can be used by other segments. You execute the following command to achieve this task:
SQL> ALTER TABLE fy05q1 DEALLOCATE UNUSED;
What would this command do?
A.deallocates the third and second extents
B.deallocates the third extent; the second extent remains as it is
C.deallocates the third extent, and the second extent is sized to 100KB
D.returns an error because the unused space is above the high water mark
Answer: C

13. In an online transaction processing (OLTP) system, you notice that the transactions are waiting. Which two techniques would you use to determine if it is a locking problem? (Choose two.)
A.query V$SESSION to determine the sessions waiting for locks
B.query V$LOCKED_OBJECT to diagnose the deadlocked sessions
C.execute the utllockt.sql script to find the list of locking and waiting transactions
D.use the catblock.sql script to populate DBA_BLOCKERS and DBA_WAITERS views
E.query the DBA_WAITERS view to determine the sessions that are waiting for a locked resource
Answer: CE

14. The following are the tasks that you need to perform to create a resource plan:
A) Creating resource consumer groups
B) Validating pending area
C) Creating a pending area
D) Creating resource plans
E) Creating plan directives
F) Submitting pending area
In which order would you perform these tasks?
A.C, D, A, E, B, F
B.C, B, F, E, A, D
C.C, B, E, D, A, F
D.C, F, E, A, D, B
tings with users once each two weeks to discuss performance
Answer: A