Secrets For Passing Oracle 1z0-064 Exam: Latest Exam Questions 2017

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Version: 9.0
Question: 1

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

Question: 2

You are administering a database that supports a mixed workload. The CURSOR_SHARING parameter is set to the default value. While analyzing the latest Automatic Workload Repository (AWR) report, you find a large number of cursor: pin S wait on X, cursor: pin X wait on S, and library cache mutex waits in the Top 10 foreground events section. Examine the Instance Efficiency Percentages section in the AWR report:

Which three statements are true in this scenario? (Choose three.)

A. Sessions are waiting for mutexes in share mode on cursors but other sessions are holding the mutexes in exclusive mode.
B. The CPU is spending more time in finding cursors in the library cache.
C. Cursors are not getting shared, resulting in a large number of hard parses.
D. Sessions are waiting for mutexes in exclusive mode on cursors but other sessions are holding the mutexes in share mode.
E. The buffers required by queries are not found in the buffer cache, thereby increasing expensive disk I/O.

Answer: B, D, E

Question: 3

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In your database, the measured 99th percentile value is used as the maximum value. You set a warning threshold level of 110% of maximum trigger as an alert.
What is the outcome? (Choose the best answer.)

A. It generates an error because the warning threshold cannot exceed 100%.
B. It generates an error because the percentage of maximum threshold cannot be set with a significance-level threshold value.
C. It generates an alert when an observed metric is 99% of the 99th percentile value as measured over the moving window baseline.
D. It generates an alert when an observed metric is 110% of the 99th percentile value as measured over the moving window baseline.
E. It generates an alert when 1 in 100 observations for an observed metric exceeds the 99th percentile value as measured over the fixed baseline.

Answer: A

Question: 4

You want to capture AWR data to monitor performance variation every Monday between 9:00 AM and 12:00 PM for three months and automatically remove the older AWR data every fortnight.
How would you achieve this? (Choose the best answer.)

A. Create AWR baselines.
B. Create SQL plan baselines.
C. Create repeating baseline templates.
D. Create database services and make sure that user connections use them to connect to the database instance.
E. Create a single baseline template.

Answer: D

Question: 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

Reference: http://docs.oracle.com/cd/B28359_01/server.111/b28274/memory.htm
Question: 6

You are administering a database that supports multiple applications, which make dedicated connections to the database instance by using different services.
You execute the command to enable tracing of the ORCL1 service:

Which two statements are true? (Choose two.)

A. A single trace file is generated for all sessions mapped to the ORCL1 service.
B. SQL trace is enabled for all modules and actions for sessions mapped to the ORCL1 service.
C. An SQL trace file is generated for each session that maps to the ORCL1 service.
D. An SQL trace file is generated for each of the modules using the ORCL1 service.
E. SQL trace is not enabled for the service because a module name is not specified.

Answer: A, C

         

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