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1Z0-064 Certification Detail Exam Code
1Z0-064
Full Exam Name
Oracle Database 12c - Performance Management and Tuning
Number of Questions
84
Practice Exams
Link in Description
Passing Score
62%
Time Limit
150 minutes
Recommended Training
Link in Description
Syllabus Topics for Oracle 1Z0-064 Exam Topic Name Basic Tuning Diagnostics Using Metrics and Alerts Using AWR-Based Tools Monitoring Applications Influencing the Optimizer Using SQL Performance Analyzer Using Database Replay Tuning the Buffer Cache Using Automatic Memory Using the Database Resource Manager Using Automatic Workload Repository Using Baselines Monitoring Real-Time Database Operation Identifying Problem SQL Statements Reducing the Cost of SQL Operations
Oracle 1Z0-064 Exam Questions
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01. Database Replay can be used to determine the overall performance change for a variety of situations. Which of the following performance tests is NOT a proper use of Database Replay? Option a) A change in operating system versions b) A workload applied to a different database version
c) A workload from a single instance applied to RAC database d) A set of SQL statements between database versions
ANSWER d) A set of SQL statements between database versions
02. Which two statements are true about ADDM or RealTime ADDM? (Choose two.) Option 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) 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. c) Real-Time ADDM can proactively detect and diagnose transient performance issues that last for a few seconds.
03. Every database tuning session has some common steps. Which of the following is not a tuning step? Option a) Comments b) Literals
c) Variables d) Identifiers e) Delimiters
ANSWER d) Identifiers
04. In which three situations can dynamic statistics be used? (Choose three.) Option a) when the sampling time is a small fraction of the total time for a query b) when an execution plan is suboptimal because of complex predicates
c) when extended statistics are not available for SQL statements that use complex predicates d) when a query is on a partitioned table with a global index e) when index statistics are missing on a column that is used in SQL statements with highly selective filters
ANSWER a) when the sampling time is a small fraction of the total time for a query b) when an execution plan is suboptimal because of complex predicates c) when extended statistics are not available for SQL statements that use complex predicates
05. Which two statements are true about gathering statistics? (Choose two.) Option a) If an application has only SQL statements with bind variables, it is better to drop existing histograms, disable creation of histograms, and allow the optimizer to select the best execution plans.
b) If end users query newly inserted data, it is possible to get a suboptimal execution plan even if the automatic statistics gathering job is enabled. c) If concurrent statistics gathering is done by using parallel execution, the Resource Manager should be used for efficient resource management. d) For each session that is accessing a global temporary table, the optimizer uses only the shared statistics.
ANSWER b) If end users query newly inserted data, it is possible to get a suboptimal execution plan even if the automatic statistics gathering job is enabled. c) If concurrent statistics gathering is done by using parallel execution, the Resource Manager should be used for efficient resource management.
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