100% Pass Updated 1Z0-084 - Oracle Database 19c Performance and Tuning Management Braindump Free

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Oracle 1Z0-084 is an exam that tests the knowledge and skills of individuals in the area of Oracle Database 19c Performance and Tuning Management. 1Z0-084 exam is designed for individuals who are responsible for managing and tuning the performance of Oracle Database 19c. It is an important certification for database administrators and developers who want to demonstrate their expertise in performance tuning.

Oracle 1Z0-084 Certification Exam is an excellent way for database professionals to demonstrate their expertise in performance and tuning management. By passing 1Z0-084 exam, candidates can prove to potential employers that they possess the knowledge and skills needed to manage and optimize Oracle Database 19c performance. Additionally, earning this certification can lead to career advancement opportunities and higher salaries.

Oracle 1Z0-084 Certification Exam is designed for individuals who want to demonstrate their expertise in managing the performance and tuning of Oracle Database 19c. 1Z0-084 exam is aimed at database administrators, performance analysts, and developers who want to prove their skills in managing and tuning Oracle Database 19c to ensure optimal performance.

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Oracle Database 19c Performance and Tuning Management Sample Questions (Q55-Q60):

NEW QUESTION # 55
Which two options are part of a Soft Parse operation?

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

Answer: B

NEW QUESTION # 56
Examine this output of a query of VSPGA_TAPGET_ADVICE:

Which statements is true'

A. With a target of 800 MB or more, all one-pass execution work areas would be eliminated.
B. GGREGATE_TARGET should be set to at least 700 MB.
C. PGAA_AGGREGATE should be set to at least 800 MB.
D. With a target of 700 MB or more, all multipass executions work areas would be eliminated.

Answer: D

Explanation:
The V$PGA_TARGET_ADVICE view provides advice on potential performance improvements by adjusting the PGA_AGGREGATE_TARGET parameter. The column ESTD_OVERALLOC_COUNT indicates the estimated number of work areas that would perform multiple passes if the PGA_AGGREGATE_TARGET were set to the size in the TARGET_MB column.
A: According to the output, at the target of 700 MB, the ESTD_OVERALLOC_COUNT is 30. This suggests that if PGA_AGGREGATE_TARGET is set to 700 MB, 30 multipass execution work areas would be required. If we look further down, at the target of 800 MB, the ESTD_OVERALLOC_COUNT is 0, indicating that increasing PGA_AGGREGATE_TARGET to 800 MB or more would eliminate the need for multipass executions, not at 700 MB as initially suggested by the option. Hence, the verified answer derived from the data is slightly nuanced; it should be 800 MB to eliminate all multipass executions.
References:
* Oracle Database Performance Tuning Guide, 19c
* Oracle Database Reference, 19c

NEW QUESTION # 57
You must configure and enable Database Smart Flash Cache for a database.
You configure these flash devices:

Examine these parameter settings:

What must be configured so that the database uses these devices for the Database Smart Flash Cache?

A. Disable Automatic Memory Management and set SGA_TARGET to 256G.
B. Set DB_FLASH_CACHE_SIZE to 256G and change device /dev/sdk to 128G.
C. Set DB_FLASH_CACHE_SIZE parameter to 192G.
D. Set DB_FLASH_CACHE_SIZE to 192G and MEMORY_TARGET to 256G.
E. Set DB_FLASH_CACHE_SIZE parameter to 128G, 64G.

Answer: E

Explanation:
To configure and enable Database Smart Flash Cache, you must set the DB_FLASH_CACHE_SIZE parameter to reflect the combined size of the flash devices youintend to use for the cache. In this scenario, two flash devices are configured: /dev/sdj with 128G and /dev/sdk with 64G.
* Determine the combined size of the flash devices intended for the Database Smart Flash Cache. In this case, it's 128G + 64G = 192G.
* However, Oracle documentation suggests setting DB_FLASH_CACHE_SIZE to the exact sizes of the individual devices, separated by a comma when multiple devices are used.
* Modify the parameter in the database initialization file (init.ora or spfile.ora) or using an ALTER SYSTEM command. Here's the command for altering the system setting:
ALTER SYSTEM SET DB_FLASH_CACHE_SIZE='128G,64G' SCOPE=SPFILE;
* Since this is a static parameter, a database restart is required for the changes to take effect.
* Upon database startup, it will allocate the Database Smart Flash Cache using the provided sizes for the specified devices.
It is important to note that MEMORY_TARGET and MEMORY_MAX_TARGET parameters should be configured independently of DB_FLASH_CACHE_SIZE. They control the Oracle memory management for the SGA and PGA, and do not directly correlate with the flash cache configuration.
References
* Oracle Database 19c Documentation on Database Smart Flash Cache
* Oracle Support Articles and Community Discussions on DB_FLASH_CACHE_SIZE Configuration

NEW QUESTION # 58
Examine these statements and output:

What parameter change activates the generation and use of SQL Plan Directives7

A. optimizer_features_enable=12.2.0.1
B. optimizer_adaptive_plans=TRUE
C. optimizer_dynamic_sampling=11
D. optimizer_adaptive_statistics = TRUE
E. optimizer_capture_sql_plan_baselines_TRUE

Answer: D

Explanation:
The optimizer_adaptive_statistics parameter, when set to TRUE, enables the optimizer to use adaptive statistics, such as SQL Plan Directives, to help improve plans by automatically adjusting them based on the actual execution statistics.
References:
* Oracle Database SQL Tuning Guide, 19c

NEW QUESTION # 59
Which statement is true about DB time in V$$YS_TIME_MODEL?

A. DB time includes the time spent executing the RMAN backup and restore command.
B. DB time is organized as a simple list of statistics and any time period is attributable to only one statistic.
C. DB time can be many times greater than the elapsed time since the database instance started.
D. DB tine excludes the time spent waiting for a CPU in the operating system run queue.

Answer: C

Explanation:
DB time includes the time spent on user and background processes. It can be greater than the elapsed time because it accumulates the active time of all the processes. For example, if two sessions are each active for 2 seconds at the same time, DB time would accumulate 4 seconds, while the elapsed time would be only 2 seconds.References:
* Oracle Database Performance Tuning Guide, 19c
* Oracle Database Reference, 19c

NEW QUESTION # 60
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