In the ever-evolving world of technology, obtaining certifications has become a vital aspect of career growth. Among the sought-after certifications, Oracle Database certification stands as a testament to one’s expertise in handling Oracle Database 19c: Performance Management and Tuning. Notably, this certification showcases the candidate’s proficiency and commitment to mastering the intricacies of Oracle’s database technology. To ace this certification, one of the key resources at your disposal is the 1Z0-084 exam dumps PDF. In this article, we will delve into the significance of these exam dumps, how they can help you succeed, and why DumpsLink offers the best 1Z0 084 pdf questions and answers.
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What is the 1Z0 084 Exam?
The Oracle Database 1Z0-084 certification, also known as the Oracle Database 19c: Performance Management and Tuning exam, evaluates a candidate’s knowledge and skills in performance management and tuning within the Oracle Database environment.
Importance of Oracle Database Certification
Earning the Oracle Database certification not only validates your expertise but also opens up a plethora of career opportunities. Employers recognize the value of certified professionals who can optimize database performance and ensure smooth operations.
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Sample Questions For the 1Z0 084 Certification
QUESTION 1
Which of the following is an advantage of using Automatic Workload Repository (AWR) in performance management and tuning of Oracle Database 19c?
A. AWR collects detailed performance statistics for all system components, including operating systems, which helps administrators diagnose and fix performance problems.
B. AWR captures a snapshot of performance metrics at regular intervals, allowing administrators to trace performance changes over time.
C. AWR uses machine learning algorithms to proactively identify performance issues and generate recommendations for tuning.
D. AWR provides live monitoring of all database activities, allowing administrators to quickly identify and resolve performance bottlenecks.
Correct Answer: B
Explanation/Reference:
1st Option: This option is incorrect because although AWR collects detailed performance statistics, it only collects these statistics from the database and not from the operating system or other system components. 2nd Option: This option is correct because AWR captures snapshots of performance metrics at regular intervals and allows administrators to compare performance over time, which can aid in identifying bottlenecks and tuning the system accordingly. 3rd Option: This option is incorrect because AWR does not use machine learning algorithms to proactively identify issues or generate recommendations for tuning. Machine learning is not a feature of AWR in Oracle Database 19c. 4th Option: This option is incorrect because while AWR provides monitoring capabilities, it is not live monitoring as it only captures performance metrics at specified intervals rather than constantly monitoring activities in real-time.
QUESTION 2
Which of the following statements about Automatic Workload Repository (AWR) retention and purging is true?
A. By default, AWR snapshots are stored for 7 days and are purged automatically.
B. AWR snapshots can only be purged manually using the PURGE command.
C. AWR snapshots are stored indefinitely and require manual purging to free up space.
D. AWR snapshots are not useful for performance analysis and should be disabled.
Correct Answer: A
Explanation/Reference:
1st Option: This option is correct because by default AWR snapshots are stored in the SYSAUX tablespace for 8 days and are purged automatically by the Oracle Database server. This retention period can be modified using the DBMS_WORKLOAD_REPOSITORY.MODIFY_SNAPSHOT_SETTINGS procedure. 2nd Option: This option is incorrect because AWR snapshots can be purged automatically after a specified retention period, or manually using the PURGE_SNAPSHOT function of the DBMS_WORKLOAD_REPOSITORY package. 3rd Option: This option is incorrect because, as mentioned in option A, AWR snapshots are purged automatically after a specified retention period. 4th Option: This option is incorrect because AWR snapshots are a crucial component of performance analysis and are used to diagnose a wide range of performance issues in the Oracle Database. Disabling AWR would severely limit the DBA’s ability to tune and optimize the database.
QUESTION 3
What is the purpose of ASM metadata backup and restore using RMAN?
A. To backup and restore ASM disk groups
B. To backup and restore ASM metadata only
C. To backup and restore both ASM disk groups and metadata
D. To backup and restore Oracle database files
Correct Answer: B
Explanation/Reference:
Option 1: This option is incorrect because it refers to the backup and restore of the ASM disk groups themselves, not just the metadata. Option 2: This option is correct because the purpose of ASM metadata backup and restore using RMAN is to backup and restore the ASM metadata only, not the entire disk groups. This is useful if you want to restore the metadata when the disk group is still available. Option 3: This option is incorrect because it refers to the backup and restore of both the ASM disk groups and metadata, which is not necessary if only the metadata needs to be restored.
Option 4: This option is incorrect because it refers to the backup and restore of Oracle database files, which is not related to ASM metadata backup and restore.
QUESTION 4
Which Oracle Database feature allows you to monitor the performance of database instance, applications, and infrastructure components?
A. Automatic Workload Repository (AWR)
B. Automatic Database Diagnostic Monitor (ADDM)
C. Active Session History (ASH)
D. Real-Time SQL Monitoring
Correct Answer: A
Explanation/Reference:
Option 1: Correct. The Automatic Workload Repository (AWR) is a feature that collects and maintains performance statistics for problem detection and self-tuning purposes. It provides a comprehensive and centralized data repository for storing, analyzing, and reporting on performance data. Option 2: Incorrect. The Automatic Database Diagnostic Monitor (ADDM) is a self-diagnostic feature that analyzes database performance data and provides recommendations for tuning and optimization.
Option 3: Incorrect. The Active Session History (ASH) is a feature that captures and stores detailed session activity statistics for analyzing database performance. Option 4: Incorrect. Real-Time SQL Monitoring is a feature that provides real-time information on the execution progress and performance of SQL statements.