Oracle 1Z0-084 Exam Questions In 3 User-Friendly Formats

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Oracle 1Z0-084 Exam is intended for experienced database administrators, performance analysts, and developers who have a solid understanding of Oracle Database 19c architecture and functionality. 1Z0-084 exam consists of 80 multiple-choice questions that must be completed within 120 minutes. The questions are designed to test the candidate's understanding of performance tuning concepts, database performance analysis techniques, and tuning methodologies.

Oracle 1Z0-084 exam is a comprehensive certification that tests the candidates’ knowledge and skills in performance tuning and management of Oracle Database 19c. It is an essential certification for database administrators, performance analysts, and developers who want to improve the performance of their database systems. By earning the Oracle Certified Professional, Oracle Database 19c Performance and Tuning Management certification, candidates can demonstrate their proficiency in performance tuning and management, and improve their career prospects in the field of database management.

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Oracle Database 19c Performance and Tuning Management Sample Questions (Q50-Q55):

NEW QUESTION # 50
Users complain about slowness and session interruptions. Additional checks reveal the following error in the application log:

Which file has additional information about this error?

A. ASH report
B. Alert log
C. SQL trace file automatically generated by the error
D. Session trace file SQL trace file automatically generated by the error

Answer: B

Explanation:
When an ORA-00060 deadlock error occurs, detailed information about the error and the deadlock graph are dumped into the alert log. This log contains a trace file name that you can use to find additional detailed information about the sessions involved in the deadlock and the SQL statements they were executing.
References:
* Oracle Database Administrator's Guide, 19c
* Oracle Database Error Messages, 19c

NEW QUESTION # 51
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: B

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 # 52
You want to reduce the amount of db file scattered read that is generated in the database.You execute the SQL Tuning Advisor against the relevant workload. Which two can be part of the expected result?

A. recommendations regarding the creation of additional indexes
B. recommendations regarding the creation of materialized views
C. recommendations regarding rewriting the SQL statements
D. recommendations regarding partitioning the tables
E. recommendations regarding the creation of SQL Patches

Answer: A,B

Explanation:
The SQL Tuning Advisor provides recommendations for improving SQL query performance. This may include suggestions for creating additional indexes to speed up data retrieval and materialized views to precompute and store query results.References:
* Oracle Database SQL Tuning Guide, 19c

NEW QUESTION # 53
Which two actions can cause invalidation or loss of one or more results in the SQL Query Result Cache?

A. One or more results were aged out of the result cache.
B. A request was made by the RCBG background process in a physical standby database that is opened read only and whose primary has a result cache.
C. Decreasing the value set for RESULT_CACHE_REMOTE_EXPIRATION.
D. result_cache_max_size is set dynamically to 0.
E. A request was made by the RCBG background of a non-RAC database.

Answer: A,D

Explanation:
The SQL Query Result Cache stores the results of queries and PL/SQL function calls for reuse. However, entries in the result cache can be invalidated or lost under certain conditions:
A: Results can be aged out of the cache when the cache becomes full and new results need to be stored. This process ensures that the cache does not exceed its allocated memory and that it contains the most recently used entries.
B: Setting theRESULT_CACHE_MAX_SIZEparameter to 0 will effectively disable the result cache and all cached results will be lost, as Oracle will no longer allocate any memory to the result cache.
References:
* Oracle Database Performance Tuning Guide, 19c

NEW QUESTION # 54
SGA_TARGET and PGA_AGGREGATE_TARGET are configured to nonzero values.
MEMORY_target is then set to a nonzero value but memory_MAX_TARGET is not set.
Which two statements are true?

Answer: D,E

Explanation:
When MEMORY_TARGET is set to a nonzero value, Oracle automatically manages the memory allocation between the System Global Area (SGA) and the Program Global Area(PGA). If MEMORY_MAX_TARGET is not explicitly set, Oracle will behave in the following manner:
* MEMORY_MAX_TARGET will default to the value of MEMORY_TARGET, assuming the platform allows for the value of MEMORY_TARGET to be increased dynamically. This means that MEMORY_TARGET represents both the initial allocation and the maximum limit for the dynamically managed memory unless MEMORY_MAX_TARGET is specified differently.
* If MEMORY_TARGET is set to a value that is less than the sum of the current values of SGA_TARGET and PGA_AGGREGATE_TARGET, Oracle will use the higher sum as the default value for MEMORY_MAX_TARGET to ensure that there is adequate memory for both areas. The database instance will not start if MEMORY_TARGET is not sufficient to accommodate the combined SGA and PGA requirements.
References
* Oracle Database Administrator's Guide 19c: Automatic Memory Management
* Oracle Database Performance Tuning Guide 19c: Using Automatic Memory Management

NEW QUESTION # 55
......

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ORACLE 1Z0-084 EXAM QUESTIONS IN 3 USER-FRIENDLY FORMATS

Oracle 1Z0-084 Exam Questions In 3 User-Friendly Formats