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Valid 1Z0-084 Test Topics & Relevant 1Z0-084 Answers

In the modern world, obtaining 1Z0-084 certification is essential. With the growing popularity of Oracle, the demand for professionals holding this Oracle Database 19c Performance and Tuning Management (1Z0-084) certification holders has increased significantly. Unfortunately, many candidates fail to pass the 1Z0-084 Exam due to outdated Oracle Database 19c Performance and Tuning Management (1Z0-084) exam study material. Such failure can lead to the loss of time, money, and confidence.

Oracle 1Z0-084 exam consists of 75 multiple-choice questions and has a time limit of 120 minutes. 1Z0-084 exam is available in several languages, including English, Japanese, and Korean. The passing score for the exam is 63%, and candidates who pass the exam will receive the Oracle Database 19c Performance and Tuning Management certification.

Oracle 1Z0-084 certification exam is an excellent way for experienced professionals to validate their skills and knowledge in Oracle Database 19c performance and tuning management. 1Z0-084 exam covers a wide range of topics and requires a thorough understanding of the database architecture and administration. Passing 1Z0-084 Exam can lead to new career opportunities and enhance the candidate's job prospects.

Oracle 1Z0-084 exam consists of 70 multiple-choice questions that must be completed within 105 minutes. 1Z0-084 exam covers a wide range of topics, including database architecture, instance tuning, SQL tuning, memory management, and performance monitoring. Candidates must have a thorough understanding of Oracle Database 19c, as well as experience with performance tuning and management tools such as Automatic Workload Repository (AWR), Automatic Database Diagnostic Monitor (ADDM), and Enterprise Manager Cloud Control.

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Oracle Database 19c Performance and Tuning Management Sample Questions (Q52-Q57):

NEW QUESTION # 52
18. The application provider has given full indications regarding the procedure to collect statistics.
To reduce the space used in the SYSAUX tablespace, you want to prevent the optimizer statistics Advisor from running.
Which method will allow you to do this?

A. Use DBMS STATS.DROP ADVISOR TASK to drop the AUTO_STATS_ADVISOR_TASK task.
B. Set the AUTO_STATS_ADVISOR_TASK global statistics preference to FALSE.
C. Set the parameter OPTIMIZER_ADAPTIVE_STATISTICS to FALSE.
D. Use DBMS_AUTO_TASK_ADMIN. DISABLE to disable the AUTO_STATS_ADVISOR_TASK task.

Answer: D

Explanation:
The Oracle Optimizer statistics advisor, which is part of the automated tasks framework, can be disabled using the DBMS_AUTO_TASK_ADMIN package. This will prevent it fromrunning and thus reduce space usage in the SYSAUX tablespace.References:
* Oracle Database PL/SQL Packages and Types Reference, 19c

NEW QUESTION # 53
Which three types of statistics are captured by statspack with snap level 6?

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

Answer: B,E,F

Explanation:
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

NEW QUESTION # 54
Which three statements are true about using the in Memory (IM) column store?

A. It improves performance for queries joining several tables using bloom filter joins.
B. It does not improve performance for queries using user-defined virtual column results.
C. It does not improve performance for queries that use join groups on columns from different tables.
D. It does not require all database data to fit in memory to improve query performance.
E. It does not improve performance for queries using cached results of function evaluations on columns from the same table.
F. It can improve OLTP workload performance by avoiding the use of indexes.

Answer: A,D,F

Explanation:
The Oracle In-Memory (IM) column store feature enhances the performance of databases by providing a fast columnar storage format for analytical workloads while also potentially benefiting OLTP workloads.
* C (True):It can improve OLTP workload performance by providing a faster access path for full table scans and reducing the need for indexes in certain scenarios, as the In-Memory store allows for efficient in-memory scans.
* E (True):The In-Memory column store does not require all database data to fit in memory. It can be used selectively for performance-critical tables or partitions, and Oracle Database will manage the population and eviction of data as needed.
* F (True):In-Memory column store can significantly improve performance for queries joining several tables, especially when bloom filters are used, as they are highly efficient with the columnar format for large scans and join processing.
The other options provided are not correct in the context of the In-Memory column store:
* A (False):While In-Memory column store is designed for analytical queries rather than caching results of function evaluations, it does not specifically avoid improving performance for queries using cached results of function evaluations.
* B (False):In-Memory column store can improve the performance of queries that use join groups, which can be used to optimize joins on columns from different tables.
* D (False):In-Memory column store can improve the performance of queries using expressions, including user-defined virtual columns, because it supports expression statistics which help in
* optimizing such queries.
References:
* Oracle Database In-Memory Guide:In-Memory Column Store in Oracle Database
* Oracle Database In-Memory Guide:In-Memory Joins
* Oracle Database In-Memory Guide:In-Memory Aggregation

NEW QUESTION # 55
During which application lifecycle phase do you take baselines?

A. Testing
B. Deployment
C. Migration or upgrade
D. Production
E. Design and development

Answer: D

Explanation:
Baselines are typically taken during the production phase of the application lifecycle. They provide a snapshot of performance metrics under normal operating conditions which can be used for comparison against future performance. Baselines are essential for understanding how the system performs under its typical workload and for detecting deviations from this expected performance over time, especially after changes like migrations, upgrades, or significant changes in user activity.
References
* Oracle Database 19c Performance Tuning Guide - Managing Performance Through Baselines

NEW QUESTION # 56
You are informed that the RMAN session that is performing the database duplication is much slower than usual. You want to know the approximate time when the rman operation will be completed.
Which view has this information?

A. V$SESSION
B. V$SESSTAT
C. V$RMAN_BACKUP_JOB_DETAILS
D. V$SESSION_LONGOPS

Answer: D

Explanation:
In Oracle Database, theV$SESSION_LONGOPSview provides insights into various operations within the database that are expected to take more than six seconds to complete. These include operations related to RMAN (Recovery Manager), such as database duplication tasks. This view displays information about the progress of these long-running operations, including the start time, elapsed time, and estimated time to completion.
When an RMAN session is performing a database duplication and is observed to be slower than usual, checking theV$SESSION_LONGOPSview can give an approximation ofwhen the RMAN operation might complete. This view includes fields likeTIME_REMAININGandELAPSED_SECONDSthat help in estimating the completion time of the operation based on its current progress.
References:
* Oracle Database Reference:V$SESSION_LONGOPS
* Oracle Database Backup and Recovery User's Guide:Monitoring RMAN Jobs

NEW QUESTION # 57
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