Pass4sure 1z0-064 Dumps Practice Test

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1Z0-064 Exam

• Oracle Database 12c - Performance Management and
  Tuning

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Oracle 12c Performance Certification Released to
Beta
The first of the new expert exams that I wrote
about back in May has just entered beta.
1Z1-064 Oracle Database 12c Performance
Management and Tuning is the 12c update to the
legacy exam 1Z0-054 Oracle Database 11g
Performance Tuning. The beta is currently
scheduled to run until late February. Betas are
often extended if not enough candidates take the
exam by the original deadline to provide a good
statistical sample. However, I expect this exam
will be popular enough that the exam may close on
its original deadline. I compared the topics of
1Z0-064 with 1Z0-054. Not surprisingly, the two
lists are closely related, with the 12c exam
being largely a refinement of the 11g
incarnation. Some of the difference between the
two exams include
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OracleExam 1z0-064Oracle Database 12c
Performance Management and TuningVersion Demo
Total Questions 10
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Oracle Pass4Sure 1Z0-064 Practice Test
Question No 1
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 the WHERE clause 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,C,D,E
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Oracle Pass4Sure 1Z0-064 Practice Test
Question No 2
You are administering a database that supports a
mixed workload. You upgrade your database from
Oracle Database 11g to 12c and after the upgrade,
users complain about degraded performance of some
queries. The SQL plan baselines imported from the
previous version are present for the queries and
are loaded to the SQL Management Base as accepted
plans. On further investigation, you find that
better plans are generated but not used by the
optimizer. Examine the parameters set for the
instance Which three tasks would you perform to
improve the performance of these queries? (Choose
three.) A. Gather statistics for the objects
used in the queries. B. Use the
DBMS_SPM.EVOLVE_SQL_PLAN_BASELINE function to
evolve new plans and fix the plans for the
statements. C. Create an SQL Tuning Set (STS) and
run it through the SQL Access Advisor to generate
recommendations. D. Create an STS and run it
through the SQL Tuning Advisor to generate
recommendations. E. Set the OPTIMIZER_CAPTURE_SQL_
PLAN_BASELINES parameter to TRUE. F. Use the
DBMS_SPM.ALTER_SQL_PLAN_BASELINE function to
alter the accepted plans as fixed plans.a
Answer A,B,C
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Oracle Pass4Sure 1Z0-064 Practice Test
Question No 3
Examine the command to change a parameter value
from the default to 50 SQLgt ALTER SYSTEM SET
OPTIMIZER_INDEX_COST_ADJ 50 What is the effect
of changing the value of the parameter? (Choose
the best answer.) A. It influences the optimizer
to use full table scans instead of index scans as
the estimated cost of full table scan is
reduced. B. It influences the optimizer to use
bitmap indexes as the estimated cost of
conversion from bitmap to rowid is reduced. C. It
influences the optimizer to always use fast full
index scans as the estimated cost of using an
index is reduced. D. It influences the optimizer
to use indexes instead of full table scans as the
estimated cost of using an index is reduced.
Answer A
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Oracle Pass4Sure 1Z0-064 Practice Test
Question No 4
Your database supports multiple applications. The
applications run on the middle tier and use
connection pooling for connecting to the
database. You notice that the sessions created by
the applications are competing for resources. You
want to statistically measure the workload and
set priorities. What action must you perform to
achieve this? (Choose the best answer.) A.
Create services for the applications and set a
relative priority by assigning them to
application users and using the
DBMS_MONITOR.SERV_MOD_ACT_TRACE_ENABLE procedure
to trace the services. B. Create services for the
applications and set a relative priority by
assigning them to application users and using the
DBMS_MONITOR.SESSION_TRACE_ENABLE procedure to
trace the services. C. Create services for the
applications and set the relative priority of
services within an instance by mapping the
services directly to consumer groups. D. Create
services for the applications and set a relative
priority by assigning them to application users.
Answer A
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Oracle Pass4Sure 1Z0-064 Practice Test
Question No 5
Which two actions can reduce library cache latch
contention for an OLTP application that
repeatedly executes queries containing a mix of
literals and bind variables? (Choose two.) A.
setting the OPEN_CURSORS parameter to hold a
sufficient number of concurrently open cursors B.
coding the application such that a frequently
executed statement is parsed only once and
executed repeatedly as required C. setting the
CURSOR_SHARING parameter to EXACT D. avoiding the
granting of privileges on objects associated with
cursors during peak load E. enabling Automatic
Memory Management and allocating at least 50 of
the available memory for SHARED_POOL_SIZE F.
configuring shared server connections
Answer B,E
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Oracle Pass4Sure 1Z0-064 Practice Test
Question 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 A,C
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Oracle Pass4Sure 1Z0-064 Practice Test
Question No 7
You are administering a database that supports an
OLTP workload. An application performs a large
number of small transactions. Users complain
about increased response times for transactions.
On investigation, you find that the cache hit
ratio is 69. Examine a partial output from
VSYSTEM_EVENT Which four can be possible
reasons for the increased response time? (Choose
four.) A. The database buffer cache is
inadequately sized. B. DBWR is not writing the
dirty buffers fast enough. C. A large number of
blocks are fetched from disks frequently. D.
Several full table scans are performed by
transactions. E. Blocks are aging out of the
buffer cache frequently. F. Many sessions are
waiting for buffers that are currently being read
into the buffer cache by other sessions.
Answer A,B,E,F
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Oracle Pass4Sure 1Z0-064 Practice Test
Question No 8
Which three methods can you use to create a
pre-change SQL trial to capture performance data
by using SQL Performance Analyzer? (Choose
three.) A. executing SQL statements in an SQL
Tuning Set (STS) on a test database by using
database links to the production database. B.
generating only execution plans on a test
database without actually running SQL
statements. C. generating an execution plan and
statistics for selective SQL statements captured
in an STS D. loading performance data and
execution plans from an STS. E. generating both
execution plans and statistics for each SQL
statement in an STS by actually running the SQL
statements on a test database.
Answer B,D,E
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Oracle Pass4Sure 1Z0-064 Practice Test
Question No 9
Examine an extract from a PGA Memory Advisory for
your database Which two inferences are correct?
(Choose two) A. Automatic management of PGA
memory is disabled. B. The current PGA size
requires the use of a temporary tablespace for
sorting operations. C. The current PGA size is
sufficient and does not require the memory
manager to allocate more memory. D. PGA size
should be increased at least four times its
current size for significant improvement in
performance and disk space management.
Answer B,D
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Oracle Pass4Sure 1Z0-064 Practice Test
Question No 10
Which two statements are true about viewing the
details of Real-Time Database Operations? (Choose
two.) A. In VSQL_MONITOR monitoring, statistics
are cumulative over several executions of the SQL
statement that is being monitored in a
session. B. SQL Developer can be used to view
running database operations. C. Oracle Enterprise
Manager Database Express can be used to view
running database operations. D. When the SQL
statement that is being monitored is executing,
VSQL_MONITOR is refreshed once every minute.
After the execution ends, the monitoring
information in VSQL_MONITOR is deleted
immediately. E. Oracle Enterprise Manager Cloud
Control can be used to view running database
operations.
Answer A,D
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