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1Z0-084시험유효자료시험자료

2025 DumpTOP 최신 1Z0-084 PDF 버전 시험 문제집과 1Z0-084 시험 문제 및 답변 무료 공유: https://drive.google.com/open?id=1iBOOZpNhxWTBbF2M8ZYnnmRI-fHrmeOs

Oracle인증 1Z0-084시험을 등록하였는데 시험준비를 어떻게 해애 될지 몰라 고민중이시라면 이 글을 보고DumpTOP를 찾아주세요. DumpTOP의Oracle인증 1Z0-084덤프샘플을 체험해보시면 시험에 대한 두려움이 사라질것입니다. DumpTOP의Oracle인증 1Z0-084덤프는Oracle인증 1Z0-084실제시험문제를 마스터한 기초에서 제작한 최신시험에 대비한 공부자료로서 시험패스율이 100%입니다. 하루 빨리 덤프를 마련하여 시험을 준비하시면 자격증 취득이 빨라집니다.

DumpTOP의Oracle인증 1Z0-084시험덤프 공부가이드는 시장에서 가장 최신버전이자 최고의 품질을 지닌 시험공부자료입니다.IT업계에 종사중이라면 IT자격증취득을 승진이나 연봉협상의 수단으로 간주하고 자격증취득을 공을 들여야 합니다.회사다니면서 공부까지 하려면 몸이 힘들어 스트레스가 많이 쌓인다는것을 헤아려주는DumpTOP가 IT인증자격증에 도전하는데 성공하도록Oracle인증 1Z0-084시험대비덤프를 제공해드립니다.

>> 1Z0-084시험유효자료 <<

1Z0-084시험유효자료 최신 덤프샘플문제 다운

1Z0-084인증시험은Oracle인증시험중의 하나입니다.그리고 또한 비중이 아주 큰 인증시험입니다. 그리고Oracle 1Z0-084인증시험 패스는 진짜 어렵다고 합니다. 우리DumpTOP에서는 여러분이1Z0-084인증시험을 편리하게 응시하도록 전문적이 연구팀에서 만들어낸 최고의1Z0-084덤프를 제공합니다, DumpTOP와 만남으로 여러분은 아주 간편하게 어려운 시험을 패스하실 수 있습니다,

최신 Oracle Database 19c 1Z0-084 무료샘플문제 (Q10-Q15):

질문 # 10
What are the least elevated values of statistics_level and C0NTR0LJ4ANAGEMENT_PACK_ACCESS that allow the usage of Monitoring of Database Operations?

A. STATISTICS_LEVEL=BASIC and CONTROL_MANAGEMENT_PACK ACCESS=DIAGOSTIC
B. STATISTICS_LEVEL=TYPICAL and CONTROL_MANAGEMENT_PACK_ACCESS-
DIAGOSTIC*TUNING
C. STATISTICS_LEVEL=ALL and
CONTROL_MANAGEMENT_PACK_ACCESS=DIAGOSTIC+TUNING
D. STATISTICS_LEVEL=TYPICAL and CONTROL_MANAGEMENT_PACK_ACCESS=DIAGOSTIC

정답：C

설명：
Monitoring of Database Operations requires that the STATISTICS_LEVEL parameter be set to ALL and CONTROL_MANAGEMENT_PACK_ACCESS be set to DIAGNOSTIC+TUNING. These settings enable all the advisory features and automatic tuning features within the Oracle Database, including the Automatic Workload Repository (AWR), Automatic Database Diagnostic Monitor (ADDM), and the full functionality of the SQL Tuning Advisor and SQL Access Advisor, which are components of the Diagnostic and Tuning packs.
* STATISTICS_LEVEL=ALL: This setting enables the collection of all system statistics for problem detection and self-tuning purposes.
* CONTROL_MANAGEMENT_PACK_ACCESS=DIAGNOSTIC+TUNING: This grants access to both the Diagnostic Pack and the Tuning Pack, which are essential for detailed performance monitoring and tuning capabilities.
References:
* Oracle Database Reference: STATISTICS_LEVEL
* Oracle Database Licensing Information User Manual: Oracle Database Management Packs

질문 # 11
Examine these statements and output:

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

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

정답：C

설명：
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

질문 # 12
You must write a statement that returns the ten most recent sales. Examine this statement:

Users complain that the query executes too slowly. Examine the statement's current execution plan:

What must you do to reduce the execution time and why?

A. Enable Adaptive Plans so that Oracle can change the Join method as well as the Join order for this query.
B. Create an index on SALES.TIME_ID to force the return of rows in the order specified by the ORDER BY clause.
C. Create an index on SALES.CUST_ID to force an INDEX RANGE SCAN on this index followed by a NESTED LOOP join between CUSTOMERS and SALES.
D. Replace the FETCH FIRST clause with ROWNUM to enable the use of an index on SALES.
E. Collect a new set of statistics on PRODUCT, CUSTOMERS, and SALES because the current stats are inaccurate.

정답：B

설명：
The execution plan shows a full table access for theSALEStable. To reduce the execution time, creating an index onSALES.TIME_IDwould be beneficial as it would allow the database to quickly sort and retrieve the most recent sales without the need to perform a full table scan, which is I/O intensive and slower. By indexing TIME_ID, which is used in theORDER BYclause, the optimizer can take advantage of the index to efficiently sort and limit the result set to the ten most recent sales.
* B (Incorrect):ReplacingFETCH FIRSTwithROWNUMwould not necessarily improve the performance unless there is an appropriate index that the optimizer can use to avoid sorting the entire result set.
* C (Incorrect):There is no indication that the current statistics are inaccurate; hence, collecting new statistics may not lead to performance improvement.
* D (Incorrect):While adaptive plans can provide performance benefits by allowing the optimizer to adapt the execution strategy, the main issue here is the lack of an index on theORDER BYcolumn.
* E (Incorrect):Creating an index onSALES.CUST_IDcould improve join performance but would not address the performance issue caused by the lack of an index on theORDER BYcolumn.
References:
* Oracle Database SQL Tuning Guide:Managing Indexes
* Oracle Database SQL Tuning Guide:Using Indexes and Clusters

질문 # 13
Which two statements are true about the use and monitoring of Buffer Cache Hit ratios and their value in tuning Database I/O performance?

A. A 99% cache hit ratio can be observed for database instances which have very poor I/O performance.
B. A 60% cache hit ratio can be observed for database instances which have very good I/O performance.
C. The buffer cache advisory view v$db_cache_advice provides advice on cache hit ratios appropriate for the instance workload.
D. Both the RECYCLE and KEEP buffer caches should always have a very high cache hit ratio.
E. The performance of workloads that primarily generate full table scans and fast full index scans are always affected by the cache hit ratio.

정답：A,C

설명：
A high buffer cache hit ratio typically indicates that the database is effectively using the buffer cache and does not often need to read data from disk. However, this metric alone is not a reliable indicator of the I/O performance of the database for several reasons:
* Full table scans and fast full index scans (A) can bypass the buffer cache by design if the blocks are not
* deemed reusable shortly, which can impact the cache hit ratio.
* A high cache hit ratio (B) can be misleading if the database performance is poor due to other factors, such as inefficient queries or contention issues.
* The buffer cache advisory (C) is a more valuable tool for understanding the potential impact of different cache sizes on the database's I/O performance. It simulates scenarios with different cache sizes and provides a more targeted recommendation.
* The RECYCLE and KEEP buffer caches (D) are specialized caches designed for certain scenarios.
While high hit ratios can be beneficial, they are not universally required; some workloads might not be significantly impacted by lower hit ratios in these caches.
* A lower cache hit ratio (E) does not necessarily mean poor I/O performance. In some cases, a system with a well-designed storage subsystem and efficient queries might perform well even with a lower cache hit ratio.
References
* Oracle Database 19c Performance Tuning Guide - Buffer Cache Hit Ratio
* Oracle Database 19c Performance Tuning Guide - v$db_cache_advice

질문 # 14
Examine this output of a query of VSPGA_TAPGET_ADVICE:

Which statements is true'

A. PGAA_AGGREGATE should be set to at least 800 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. GGREGATE_TARGET should be set to at least 700 MB.

정답：C

설명：
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.

질문 # 15
......

관심있는 인증시험과목Oracle 1Z0-084덤프의 무료샘플을 원하신다면 덤프구매사이트의 PDF Version Demo 버튼을 클릭하고 메일주소를 입력하시면 바로 다운받아Oracle 1Z0-084덤프의 일부분 문제를 체험해 보실수 있습니다. PDF버전외에 온라인버전과 테스트엔버전 Demo도 다운받아 보실수 있습니다.

1Z0-084최신 업데이트버전 덤프문제공부: https://www.dumptop.com/Oracle/1Z0-084-dump.html

샘플문제는 1Z0-084덤프에 포함되어 있습니다.가장 최신 1Z0-084시험에 대비하여 제작된 1Z0-084덤프는 응시자분들의 시험준비에 대한 모든 로망을 만족해드립니다.자격증을 취득하면 취직이나 연봉협상 또는 승진이거나 이직에 크나큰 영향을 일으킬수 있습니다, 1Z0-084 시험에서 불합격 받을시 구매일로부터 60일내에 환불신청하시면 덤프비용을 환불해드리기에 부담없이 구매하셔도 됩니다, DumpTOP 1Z0-084최신 업데이트버전 덤프문제공부를 선택은 여러분이 최고의 선택입니다, DumpTOP에서 출시한 Oracle인증 1Z0-084덤프는 IT인사들이 자격증 취득의 험난한 길에서 없어서는 안될중요한 존재입니다, DumpTOP 1Z0-084최신 업데이트버전 덤프문제공부는 여러분의 연봉상승을 도와 드리겠습니다.

리안은 별로 마음에 들어 하는 눈치는 아니었지만 부정하지는 못했다, 바르르 떨리던 눈꺼풀이 격정적으로 감겨들자 한껏 고여 있던 눈물이 그대로 뺨을 타고 흘렀다, 샘플문제는 1Z0-084덤프에 포함되어 있습니다.가장 최신 1Z0-084시험에 대비하여 제작된 1Z0-084덤프는 응시자분들의 시험준비에 대한 모든 로망을 만족해드립니다.자격증을 취득하면 취직이나 연봉협상 또는 승진이거나 이직에 크나큰 영향을 일으킬수 있습니다.

시험준비에 가장 좋은 1Z0-084시험유효자료 덤프 최신 데모문제

1Z0-084 시험에서 불합격 받을시 구매일로부터 60일내에 환불신청하시면 덤프비용을 환불해드리기에 부담없이 구매하셔도 됩니다, DumpTOP를 선택은 여러분이 최고의 선택입니다, DumpTOP에서 출시한 Oracle인증 1Z0-084덤프는 IT인사들이 자격증 취득의 험난한 길에서 없어서는 안될중요한 존재입니다.

DumpTOP는 여러분의 연봉상승을 도와 드리겠습니다.

참고: DumpTOP에서 Google Drive로 공유하는 무료, 최신 1Z0-084 시험 문제집이 있습니다: https://drive.google.com/open?id=1iBOOZpNhxWTBbF2M8ZYnnmRI-fHrmeOs

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