How to Sure Score A* in CAIE Exams: A 2025 Action Plans

Madison Lee Madison Lee

0 Course Enrolled • 0 Course Completed

Biography

Oracle 1z1-084 Exam Quick Prep | Reliable 1z1-084 Test Book

DOWNLOAD the newest Pass4suresVCE 1z1-084 PDF dumps from Cloud Storage for free: https://drive.google.com/open?id=1BSgOkiEYVPZR3EGImVtdMLzo87aMwz-A

Believe it or not, our 1z1-084 preparation questions will relieve you from poverty. It is important to make large amounts of money in modern society. Our 1z1-084 practice engine has assisted many people to improve themselves. You also can become the lucky guys as long as you are willing to learn. And with our 1z1-084 Exam Materials, you will find that to learn something is also a happy and enjoyable experience, and you can be rewarded by the certification as well.

Oracle 1Z0-084 certification is a valuable credential for professionals working with Oracle Database 19c. It demonstrates their expertise in managing and optimizing database performance, which is a critical aspect of maintaining a reliable and efficient database infrastructure. By earning this certification, candidates can enhance their career prospects and demonstrate their commitment to professional development and excellence.

>> Oracle 1z1-084 Exam Quick Prep <<

Oracle - Fantastic 1z1-084 Exam Quick Prep

One of the key factors for passing the exam is practice. Candidates must use Oracle 1z1-084 practice test material to be able to perform at their best on the real exam. This is why Pass4suresVCE has developed three formats to assist candidates in their Oracle 1z1-084 Preparation. These formats include desktop-based Oracle 1z1-084 practice test software, web-based practice test, and a PDF format.

Oracle 1Z0-084 Exam is ideal for database administrators, engineers, and architects who want to demonstrate their expertise in performance tuning and management of Oracle Database 19c. 1z1-084 Exam curriculum covers several aspects such as tuning database parameters, optimizing memory usage, optimizing SQL statements, diagnosing and resolving performance issues, and many more. Obtaining the certification requires a thorough knowledge of both theoretical and practical aspects of performance optimization.

Oracle Database 19c Performance and Tuning Management Sample Questions (Q34-Q39):

NEW QUESTION # 34
Which two statements are true about disabling Automatic Shared Memory Management (ASMM)?

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

Answer: A,C

Explanation:
When ASMM is disabled, the sizes of the automatically managed SGA components remain at their current values. ASMM is controlled by theSGA_TARGETparameter. IfSGA_TARGETis 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 settingSGA_TARGETto 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 # 35
Examine these statements and output:

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

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

Answer: C

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 # 36
Examine this output of a query of VSPGA_TAPGET_ADVICE:

Which statements is true'

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

Answer: C

Explanation:
The query output from V$PGA_TARGET_ADVICE provides tuning information for the PGA (Program Global Area). Let's break it down step by step:
Key Columns in the Output:
* TARGET_MB:
* Represents the hypothetical PGA_AGGREGATE_TARGET values (in megabytes) evaluated by Oracle.
* CACHE_HIT_PERC:
* The percentage of work areas that could execute in-memory (optimal execution) without requiring temporary disk writes.
* Higher percentages indicate fewer work areas requiring disk I/O.
* ESTD_OVERALLOC_COUNT:
* The estimated number of work areas that need to go to disk (multipass operations or overallocations).
Observations from the Data:
* At TARGET_MB = 700 MB:
* The CACHE_HIT_PERC is 68%.
* The ESTD_OVERALLOC_COUNT is 30. This indicates that some multipass work areas still exist.
* At TARGET_MB = 800 MB:
* The CACHE_HIT_PERC rises to 74%.
* The ESTD_OVERALLOC_COUNT drops to 0. This indicates that no work areas require multipass execution.
* At TARGET_MB = 900 MB and above:
* The CACHE_HIT_PERC increases slightly to 82%-84%.
* The ESTD_OVERALLOC_COUNT remains 0, meaning that all work areas are now either optimal or one-pass.
Why D is Correct:
* At 800 MB or more, the ESTD_OVERALLOC_COUNT is 0, indicating that all one-pass execution work areas are eliminated.
* A one-pass execution requires temporary disk I/O for intermediate results, but with sufficient PGA, these are no longer necessary.
Why Other Options Are Incorrect:
* Option A:
* It mentions all multipass executions work areas would be eliminated at 700 MB. This is incorrect because, at 700 MB, the ESTD_OVERALLOC_COUNT is still 30, indicating some multipass work areas still exist.
* Option B:
* Suggests setting the PGA_AGGREGATE_TARGET to at least 800 MB, which is partially correct but does not address the elimination of one-pass execution.
* Option C:
* Suggests setting the PGA_AGGREGATE_TARGET to at least 700 MB, which is not sufficient to eliminate all one-pass executions, as shown by the ESTD_OVERALLOC_COUNT of 30.

NEW QUESTION # 37
Which two statements are true about session wait information contained in v$session or v$session_wait?

A. Rows for sessions displaying WAITED UNKNOWN TIME in the STATE column indicate that the session is still waiting.
B. Rows for sessions that are not waiting might contain the actual wait time for the last event for which they waited.
C. Rows for sessions that are not waiting always contain the total wait time since the session started.
D. Rows for sessions that are currently waiting have a wait time of 0.
E. Rows for sessions that are currently waiting have their wait time incremented every microsecond.

Answer: B,D

Explanation:
In theV$SESSIONview, Oracle provides information about the session waits:
B: When theWAIT_TIMEcolumn has a value of 0, it signifies that the session is currently waiting for a resource. This column represents the duration of the current or last wait.
C: If the session is not actively waiting, theWAIT_TIMEcolumn shows the time the session spent waiting for the last wait event. If theSTATEcolumn is showing "WAITED KNOWN TIME", it means the session is not currently waiting, but it indicates the time for which it had waited.
References:
* Oracle Database Reference, 19c
* Oracle Database Performance Tuning Guide, 19c

NEW QUESTION # 38
A database instance is suffering poor I/O performance on two frequently accessed large tables.
No Big Table caching occurs in the database.
Examine these parameter settings:

Which are two actions either one of which will allow Big Table caching to occur?

A. Setting PARALLEL_DEGREE_POLICYADAPTIVE
B. Increasing DB_CACHESIZE to 1 G
C. Increasing DB_BIG_TABLE_CACHE_PERCENT_TARGET to at least 25
D. Increasing DB_BIG_TABLE_CACHE_PERCENT_TARGET to at least 50
E. Setting DB_KEEP_CACHE_SIZE to at least 50M
F. Setting PARALLEL_DEGREE_POLICYAUTO

Answer: B,C

Explanation:
Big Table caching is a feature that allows frequently accessed large tables to be cached in memory to improve I/O performance. From the parameter settings provided, Big Table caching is not occurring because DB_BIG_TABLE_CACHE_PERCENT_TARGET is set to 10, which is the minimum threshold for enabling the feature, but the size of the cache is too small for the big tables to be effectively cached.
To enable Big Table caching, one of the following actions could be taken:
* C (Correct): Increasing DB_BIG_TABLE_CACHE_PERCENT_TARGET to at least 25. This action would allocate a larger percentage of the buffer cache for storing big tables, which could allow for caching large tables and thus improve I/O performance.
* D (Correct): Increasing DB_CACHE_SIZE to 1G. Since the size of the buffer cache is a determining factor for how much data can be cached, increasing this parameter would provide more memory space for big tables to be cached.
Options A, B, E, and F will not enable Big Table caching because:
* A: Increasing DB_BIG_TABLE_CACHE_PERCENT_TARGET to 50 without adjusting the overall size of the cache might still not be sufficient if the DB_CACHE_SIZE is not large enough to hold the big tables.
* B: Setting DB_KEEP_CACHE_SIZE to at least 50M only specifies a separate buffer pool for objects with the KEEP cache attribute and does not affect Big Table caching.
* E: and F: Changing the PARALLEL_DEGREE_POLICY to ADAPTIVE or AUTO influences the behavior of parallel execution but does not directly enable or influence Big Table caching.
References:
* Oracle Database Performance Tuning Guide: Big Table Caching
* Oracle Database Reference: DB_BIG_TABLE_CACHE_PERCENT_TARGET
* Oracle Database Reference: DB_CACHE_SIZE

NEW QUESTION # 39
......

Reliable 1z1-084 Test Book: https://www.pass4suresvce.com/1z1-084-pass4sure-vce-dumps.html

DOWNLOAD the newest Pass4suresVCE 1z1-084 PDF dumps from Cloud Storage for free: https://drive.google.com/open?id=1BSgOkiEYVPZR3EGImVtdMLzo87aMwz-A