QUIZ LATEST 1Z1-084 - NEW ORACLE DATABASE 19C PERFORMANCE AND TUNING MANAGEMENT EXAM PASS4SURE

Quiz Latest 1z1-084 - New Oracle Database 19c Performance and Tuning Management Exam Pass4sure

Quiz Latest 1z1-084 - New Oracle Database 19c Performance and Tuning Management Exam Pass4sure

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Oracle Database 19c Performance and Tuning Management Sample Questions (Q12-Q17):

NEW QUESTION # 12
Examine this statement and its corresponding execution plan:

Which phase introduces the CONCATENATION step?

  • A. SQL Adaptive Execution
  • B. SQL Semantic Check
  • C. SQL Transformation
  • D. SQL Row Source Generation
  • E. SQL Execution

Answer: C

Explanation:
The CONCATENATION step in an execution plan is introduced during the SQL Transformation phase. This phase is part of the optimizer's query transformations which can include various techniques to rewrite the query for more efficient execution. The CONCATENATION operation is used to combine the results of two separate SQL operations, typically when there is an OR condition in the WHERE clause, as seen in the provided query.
References:
* Oracle Database SQL Tuning Guide, 19c
* Oracle Database Concepts, 19c


NEW QUESTION # 13
Which two statements are true about disabling Automatic Shared Memory Management (ASMM)?

  • A. All SGA components excluding fixed SGA and other internal allocations are readjusted immediately after disabling ASMM.
  • B. All auto-tuned SGA components are reset to their original user-defined values.
  • C. All SGA components retain their current sizes at the time of disabling.
  • D. Both SGA_TARGET and SGA_MAX_SIZE must be set to zero.
  • E. The SGA size remains unaffected after disabling ASMM.
  • F. It requires a database instance restart to take effect.

Answer: C,E

Explanation:
When ASMM is disabled, the sizes of the automatically managed SGA components remain at their current values. ASMM is controlled by the SGA_TARGET parameter. If SGA_TARGET is set to a non-zero value, ASMM is enabled and Oracle will automatically manage the sizes of the various SGA components. When ASMM is disabled, by setting SGA_TARGET to zero, the SGA components that were automatically sized will retain their current sizes rather than being reset to their original user-defined values. The overall size of the SGA remains the same unless manually changed by modifying individual component sizes or SGA_MAX_SIZE.
References:
* Oracle Database Administration Guide, 19c
* Oracle Database Performance Tuning Guide, 19c


NEW QUESTION # 14
Which two options are part of a Soft Parse operation?

  • A. Syntax Check
  • B. SQL Row Source Generation
  • C. Semantic Check
  • D. SQL Optimization
  • E. Shared Pool Memory Allocation

Answer: C

Explanation:
During a soft parse, Oracle checks the shared SQL area to see if an incoming SQL statement matches one already in the shared pool. This operation includes syntax and semantic checks. The syntax check ensures the statement is properly formed, and the semantic check confirms that all the objects referenced in the SQL statement exist and that the user has the necessary privileges to access them.References:
* Oracle Database Concepts, 19c
* Oracle Database SQL Tuning Guide, 19c


NEW QUESTION # 15
Examine this command:

What is the maximum number of baselines generated by this command that you can have at any given time?

  • A. 0
  • B. 1
  • C. 2
  • D. 3

Answer: C

Explanation:
TheDBMS_WORKLOAD_REPOSITORY.CREATE_BASELINE_TEMPLATEprocedure is used to create a repeating baseline template in the Automatic Workload Repository (AWR). This template will generate baselines for a specified duration of time on a repeating schedule. Theparameters of the CREATE_BASELINE_TEMPLATEprocedure include the start and end times, as well as the day of the week and hour in the day when the baseline should be captured.
Given that the command specifies a repeating baseline every Monday at 5 PM with a duration of 3 hours and it expires after 30 days, the number of baselines generated by this command that you can have at any given time depends on how many Mondays fall within the most recent 30-day period.
Since the maximum number of Mondays that can occur within any 30-day period is 5 (four to five weeks), but considering the baseline has a duration of 3 hours and starts every Monday at 5 PM, only one baseline for each Monday can exist at a time. However, since baselines are preserved for 30 days, you could have multiple instances of Monday baselines preserved at a time.
* A (Incorrect):There can be more than one baseline at a time because the template will generate a baseline for every Monday during the 30-day expiration period.
* B (Incorrect):There will be more than three baselines because the template creates a baseline for every Monday within the 30-day expiration period.
* C (Correct):Over a 30-day period, considering the duration of the baselines and their frequency, you could have up to a maximum of 52 baselines if you consider the entire year.
* D (Incorrect):There is no option that restricts the number of baselines to 5 specifically, the answer relies on the calculation of how many baselines can exist over a period of time considering their expiration.
References:
* Oracle Database PL/SQL Packages and Types Reference:DBMS_WORKLOAD_REPOSITORY


NEW QUESTION # 16
Examine these commands, which execute successfully:

Which statement is true?

  • A. ADDM, AWR, and ASH reports can be purged automatically.
  • B. AWR- snapshots in all pluggable databases will be purged automatically after every 60 mins.
  • C. AWR snapshots can be purged manually in pluggable databases.
  • D. AD DM is enabled for all pluggable databases.

Answer: C

Explanation:
The DBMS_WORKLOAD_REPOSITORY.MODIFY_SNAPSHOT_SETTINGS procedure allows
setting attributes related to AWR snapshots. While the interval setting controls the frequency of snapshot generation, purging them is a separate process that can be managed either automatically (with retention settings) or manually.References:
* Oracle Database PL/SQL Packages and Types Reference, 19c
* Oracle Multitenant Administrator's Guide, 19c


NEW QUESTION # 17
......

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