Oracle 1z1-084덤프공부 & 1z1-084자격증문제

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DumpTOP에는Oracle 1z1-084인증시험의 특별한 합습가이드가 있습니다. 여러분은 많은 시간과 돈을 들이지 않으셔도 많은 IT관련지식을 배우실수 있습니다.그리고 빠른 시일 내에 여러분의 IT지식을 인증 받으실 있습니다. DumpTOP인증자료들은 우리의 전문가들이 자기만의 지식과 몇 년간의 경험으로 준비중인 분들을 위하여 만들었습니다.

DumpTOP는 여러분이 빠른 시일 내에Oracle 1z1-084인증시험을 효과적으로 터득할 수 있는 사이트입니다.Oracle 1z1-084인증 자격증은 일상생활에 많은 개변을 가져올 수 있는 시험입니다.Oracle 1z1-084인증 자격증을 소지한 자들은 당연히 없는 자들보다 연봉이 더 높을 거고 승진기회도 많아지며 IT업계에서의 발전도 무궁무진합니다.

>> Oracle 1z1-084덤프공부 <<

1z1-084자격증문제, 1z1-084시험패스 가능한 인증공부

IT업계에 종사하는 분이 점점 많아지고 있는 지금 IT인증자격증은 필수품으로 되었습니다. IT인사들의 부담을 덜어드리기 위해DumpTOP는Oracle인증 1z1-084인증시험에 대비한 고품질 덤프를 연구제작하였습니다. Oracle인증 1z1-084시험을 준비하려면 많은 정력을 기울여야 하는데 회사의 야근에 시달리면서 시험공부까지 하려면 스트레스가 이만저만이 아니겠죠. DumpTOP 덤프를 구매하시면 이제 그런 고민은 끝입니다. 덤프에 있는 내용만 공부하시면 IT인증자격증 취득은 한방에 가능합니다.

최신 Oracle Database 19c 1z1-084 무료샘플문제 (Q38-Q43):

질문 # 38
Multiple sessions are inserting data concurrently into a table that has an LOB column.
At some point in time, one of the sessions cannot find available space in the LOB segment and needs to allocate a new extent.
Which wait event will be raised in the other sessions that need space in the LOB column?

A. enq: TM - contention
B. enq: TX - allocate ITL entry
C. enq: HW - contention
D. enq: SQ - contention

정답：C

설명：
When sessions concurrently insert data into a table with an LOB column and one session needs to allocate a new extent because it cannot find available space, the wait event associated with this contention is "enq: HW - contention". The HW stands for High Water Mark which is related to space allocation in the database segment.
When asession needs to allocate a new extent, it may raise this wait event in other sessions that are also attempting to allocate space in the same LOB segment.
References
* Oracle Database 19c Reference Guide - enq: HW - contention

질문 # 39
Which two statements are true about space usage in temporary tablespaces?

A. Temporary tablespaces setting Includes quotas to limit temporary space used by a session for that Temporary tablespace.
B. Lack of temporary tablespace space for sort operations can be prevented by using temporary tablespace groups.
C. A sort will fail if a sort to disk requires more disk space and no additional extent can be found/allocated in/for the sort segment.
D. When a global temporary table instantiation is too large to fit in memory, space is allocated in a temporary tablespace.
E. When a session consumes all temporary tablespace storage, then the session would hang until the temporary space used by that session is cleared.

정답：B,D

설명：
Regarding space usage in temporary tablespaces, the following statements are true:
* A (Correct): When a global temporary table or a sort operation exceeds the available memory, Oracle Database allocates space in a temporary tablespace to store the temporary data or intermediate results.
* E (Correct): Using temporary tablespace groups can prevent insufficient temporary tablespace for sort operations by providing a collective pool of space from multiple temporary tablespaces, which can be used for user sorting operations.
The other options provided have inaccuracies:
* B (Incorrect): Oracle does not provide a mechanism for setting quotas on temporary tablespaces.
Quotas can be set for permanent tablespaces but not for temporary ones.
* C (Incorrect): A sort operation may fail due to insufficient space, but Oracle will attempt to allocate space in the temporary tablespace dynamically. If no space can be allocated, an error is returned rather than a sort failure.
* D (Incorrect): If a session consumes all available temporary tablespace storage, Oracle will not hang the session; it will return an error to the session indicating that it has run out of temporary space.
References:
* Oracle Database Administrator's Guide: Managing Space for Schema Objects
* Oracle Database Concepts: Temporary Tablespaces

질문 # 40
Database performance has degraded recently.
index range scan operations on index ix_sales_time_id are slower due to an increase in buffer gets on sales table blocks.
Examine these attributes displayed by querying DBA_TABLES:

Now, examine these attributes displayed by querying DBA_INDEXES:

Which action will reduce the excessive buffer gets?

A. Partition index IX_SALES_TIME_ID using hash partitioning.
B. Re-create the SALES table using the columns in IX_SALES_TIME_ID as the hash partitioning key.
C. Re-create the SALES table sorted in order of index IX_SALES_TIME_ID.
D. Re-create index IX_SALES_TIME_ID using ADVANCED COMPRESSION.

정답：D

설명：
Given that index range scan operations on IX_SALES_TIME_ID are slower due to an increase in buffer gets, the aim is to improve the efficiency of the index access. In this scenario:
* B (Correct): Re-creating the index using ADVANCED COMPRESSION can reduce the size of the index, which can lead to fewer physical reads (reduced I/O) and buffer gets when the index is accessed, as more of the index can fit into memory.
The other options would not be appropriate because:
* A (Incorrect): Re-creating the SALES table sorted in order of the index might not address the issue of excessive buffer gets. Sorting the table would not improve the efficiency of the index itself.
* C (Incorrect): Using the columns in IX_SALES_TIME_ID as a hash partitioning key for the SALES table is more relevant to data distribution and does not necessarily improve index scan performance.
* D (Incorrect): Hash partitioning the index is generally used to improve the scan performance in a parallel query environment, but it may not reduce the number of buffer gets in a single-threaded query environment.
References:
* Oracle Database SQL Tuning Guide: Managing Indexes
* Oracle Database SQL Tuning Guide: Index Compression

질문 # 41
A database supporting a mixed workload is hosted on a server with 64 CPUs.
A large number of free buffer waits and buffer busy waits occur affecting performance.
The buffer cache size was then increased but after a few hours, the same wait events occur more often than before the change.
Examine these parameter settings:

Which two actions can help reduce the number of these waits7

A. increasing the value of DBWRITERPROCESSES to 64,
B. setting dbwr_io_slaves to 64
C. reducing the values of DB_FILE_MULTILOCK_READ_COUNT to 64
D. Increasing the size of MEMORYTARGET
E. increasing the value of DB_FILE_MULTIBLOCK_READ_COUNT to 128

정답：A,B

설명：
Given a server with 64 CPUs, if the buffer cache size increase did not alleviate free buffer waits and buffer busy waits, one can look into optimizing I/O and the efficiency of the DB writer processes.
C: Setting theDBWR_IO_SLAVESparameter to a non-zero value, such as the number of CPUs, would initiate I/O slave processes to assist the DB writer process. This can help reduce I/O contention when writing from the buffer cache to disk, particularly for systems without asynchronous I/O capabilities.
D: Increasing the value ofDBWRITERPROCESSESenables multiple DB writer processes to be active simultaneously. In a system with many CPUs, such as 64, increasing this value can improve the write throughput to disk and potentially reduce buffer busy waits.
References:
* Oracle Database Reference, 19c
* Oracle Database Performance Tuning Guide, 19c

질문 # 42
Which three types of statistics are captured by statspack with snap level 6?

A. Plan usage data
B. Segment-level statistics
C. Optimizer execution plans
D. Enqueue statistics
E. Parent and child latches
F. Parent and child latches

정답：B,D,F

설명：
Statspack is a performance diagnostic tool provided by Oracle prior to the introduction of the Automatic Workload Repository (AWR). At snap level 6, Statspack captures the following types of statistics:
* A (Correct):Parent and child latches are captured. Latch statistics provide information about contention for latches, which are low-level serialization mechanisms used by Oracle.
* E (Correct):Enqueue statistics, which provide information on the waits for locks that manage the concurrency between users.
* F (Correct):Segment-level statistics, which provide detailed information on database segments such as tables, indexes, etc., to identify I/O and contention issues.
* C (Incorrect):While optimizer execution plans are an essential aspect of performance tuning, detailed execution plan capture is not part of the Statspack report at level 6.
* D (Incorrect):Plan usage data refers to how frequently a plan is being used, which is more associated with AWR and not typically captured in Statspack reports.
References:
* Oracle Database Performance Tuning Guide:Using Statspack

질문 # 43
......

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1z1-084자격증문제: https://www.dumptop.com/Oracle/1z1-084-dump.html

1z1-084인증시험패스는 쉬운 일은 아닙니다, Oracle 1z1-084덤프공부 성공으로 향하는 길에는 많은 방법과 방식이 있습니다, Oracle Database 19c Performance and Tuning Management 인기시험 출제경향을 퍼펙트하게 연구하여 1z1-084인기덤프를 출시하였습니다, DumpTOP는 고품질의 IT Oracle 1z1-084시험공부자료를 제공하는 차별화 된 사이트입니다, Oracle인증 1z1-084 덤프에 있는 문제만 이해하고 공부하신다면Oracle인증 1z1-084시험을 한방에 패스하여 자격증을 쉽게 취득할수 있을것입니다, Oracle 1z1-084덤프로Oracle 1z1-084시험패스 GO GO GO !

하지만 뭔가 억압되어 있고, 갇혀 있는 느낌도 있고.자네가 발굴하고 싶은 게로군, 제가 뭘 했다고 그러십니까, 1z1-084인증시험패스는 쉬운 일은 아닙니다, 성공으로 향하는 길에는 많은 방법과 방식이 있습니다.

1z1-084덤프공부 인기자격증 덤프공부

Oracle Database 19c Performance and Tuning Management 인기시험 출제경향을 퍼펙트하게 연구하여 1z1-084인기덤프를 출시하였습니다, DumpTOP는 고품질의 IT Oracle 1z1-084시험공부자료를 제공하는 차별화 된 사이트입니다, Oracle인증 1z1-084 덤프에 있는 문제만 이해하고 공부하신다면Oracle인증 1z1-084시험을 한방에 패스하여 자격증을 쉽게 취득할수 있을것입니다.

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