NEW EXAM 1Z0-084 DISCOUNT 100% PASS | PASS-SURE 1Z0-084: ORACLE DATABASE 19C PERFORMANCE AND TUNING MANAGEMENT 100% PASS

New Exam 1Z0-084 Discount 100% Pass | Pass-Sure 1Z0-084: Oracle Database 19c Performance and Tuning Management 100% Pass

New Exam 1Z0-084 Discount 100% Pass | Pass-Sure 1Z0-084: Oracle Database 19c Performance and Tuning Management 100% Pass

Blog Article

Tags: Exam 1Z0-084 Discount, 1Z0-084 Exam Tutorial, 1Z0-084 Pdf Torrent, Exam 1Z0-084 Answers, New 1Z0-084 Exam Testking

The desktop-based practice exam software is the first format that 1Z0-084 provides to its customers. It allows candidates to track their progress from start to finish and provides an easily accessible progress report. This Oracle 1Z0-084 Practice Questions is customizable and mimics the real exam's format. It is user-friendly on Windows-based computers, and the product support staff is available to assist with any issues that may arise.

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.

>> Exam 1Z0-084 Discount <<

Ace Your Oracle 1Z0-084 Exam with CertkingdomPDF: Comprehensive Study Material and Real Exam Questions

It is well known, to get the general respect of the community needs to be achieved by acquiring knowledge, and a harvest. Society will never welcome lazy people, and luck will never come to those who do not. We must continue to pursue own life value, such as get the test 1Z0-084 Certification, not only to meet what we have now, but also to constantly challenge and try something new and meaningful.

Oracle 1Z0-084 Exam is designed for professionals who want to enhance their skills and expertise in performance and tuning management of Oracle Database 19c. 1Z0-084 exam covers a wide range of topics related to database performance and tuning management and tests the candidate's ability to use various performance tuning tools and techniques to optimize database performance. Oracle Database 19c Performance and Tuning Management certification is recognized globally and is highly valued by employers, making it an essential certification for professionals in the field of database administration and performance tuning.

Oracle Database 19c Performance and Tuning Management Sample Questions (Q38-Q43):

NEW QUESTION # 38
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 60% cache hit ratio can be observed for database instances which have very good I/O performance.
  • B. A 99% cache hit ratio can be observed for database instances which have very poor 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.

Answer: B,C

Explanation:
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


NEW QUESTION # 39
Which two options are part of a Soft Parse operation?

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

Answer: D

Explanation:
During a soft parse, Oracle checks the shared SQL area to see if an incoming SQL statement matches one already in the shared pool. This operation includes syntax and semantic checks. The syntax check ensures the statement is properly formed, and the semantic check confirms that all the objects referenced in the SQL statement exist and that the user has the necessary privileges to access them.References:
* Oracle Database Concepts, 19c
* Oracle Database SQL Tuning Guide, 19c


NEW QUESTION # 40
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:
The DBMS_WORKLOAD_REPOSITORY.CREATE_BASELINE_TEMPLATE procedure 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. The parameters of the CREATE_BASELINE_TEMPLATE procedure 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 # 41
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 rewriting the SQL statements
  • B. recommendations regarding partitioning the tables
  • C. recommendations regarding the creation of materialized views
  • D. recommendations regarding the creation of SQL Patches
  • E. recommendations regarding the creation of additional indexes

Answer: C,E

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 # 42
Examine this statement and output:

Which three statements are true?

  • A. Session 8779 may be waiting due to a network problem.
  • B. Session 8779 may be waiting for a user or application response.
  • C. Session 9857 is not waiting.
  • D. Session 9822 will always stop waiting if the session that owns the TX enqueue issues a COMMIT statement as session 9822 is the first session in the transaction queue.
  • E. Both 9822 and 8779 sessions are waiting for operating system resources.
  • F. Session 9857 waited 1354 seconds for another process, which was also waiting for a transaction to end.

Answer: A,B,D

Explanation:
For this SQL statement and output, we can analyze theEVENTcolumn to understand the type of wait:
B: The event "SQL*Net message from client" typically indicates that the session is waiting for a response from the client. This can be due to a network issue, user response, or an application processing delay.
E: The event "SQL*Net message from client" also implies that the session is idle waiting for the client (a user or an application) to send a request to the server. This event usually indicates that the session is not actively working but is instead waiting for the next command.
F: The wait event "enq: TX - row lock contention" suggests that session 9822 is waiting for a row-level lock held by another session. If the holding session issues a COMMIT or ROLLBACK, the lock will be released, and session 9822 will stop waiting. Since this session is experiencing row lock contention, it implies it's waiting for a specific transaction to complete.
References:
* Oracle Database Reference, 19c
* Oracle Wait Events Documentation


NEW QUESTION # 43
......

1Z0-084 Exam Tutorial: https://www.certkingdompdf.com/1Z0-084-latest-certkingdom-dumps.html

Report this page