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| Certification Vendor: | Oracle |
|---|---|
| Exam Name: | Oracle Database 19c: Performance Management and Tuning |
| Exam Number: | 1Z0-084 |
| Real Exam Qty: | 50โ60 |
| Certificate Validity Period: | No expiration (Oracle certification policy since 2021) |
| Available Languages: | English |
| Exam Format: | Scenario-based Questions, Multiple Response, Multiple Choice |
| Related Certifications: | Oracle Database 19c Administration Oracle Database 19c Performance Management Oracle Database Administrator Certified Professional |
| Exam Duration: | 120 minutes |
| Passing Score: | Approximately 60โ68% (Oracle passing scores vary by exam form) |
| Exam Price: | USD 245 (may vary by region) |
| Recommended Training: | Oracle Database 19c: Performance Management and Tuning (Oracle University) |
| Exam Registration: | Oracle Certification Registration Pearson VUE Oracle Exams |
| Sample Questions: | Oracle 1Z0-084 Sample Questions |
| Exam Way: | Online proctored exam or Pearson VUE test center |
| Pre Condition: | Recommended: Oracle Database 19c Administration or equivalent DBA experience |
| Official Syllabus URL: | https://education.oracle.com |
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Oracle is a globally recognized corporation that is responsible for several innovative IT solutions. Its flagship product, the Oracle database, has revolutionized the way organizations store, manage and retrieve data since its inception. With the latest release of Oracle Database 19c, it is now possible to optimize, manage and enhance the performance of databases with greater ease and effectiveness. One of the emerging areas of knowledge and expertise related to Oracle databases is performance and tuning management, which is now covered by the 1Z0-084 Oracle exam.
Oracle 1Z0-084 certification is an excellent way for professionals to enhance their skills and knowledge in Oracle Database 19c performance and tuning management. Oracle Database 19c Performance and Tuning Management certification is globally recognized and is considered a valuable asset in the IT industry. Professionals who hold the 1Z0-084 certification can demonstrate their expertise and credibility in optimizing database performance, ensuring system availability, and reducing system downtime. Overall, the Oracle 1Z0-084 Certification is an excellent investment for professionals who want to advance their career in database management.
Oracle 1Z0-084 Exam is a certification that portrays a professional's skills and knowledge in performance tuning and management of the Oracle Database 19c. A candidature that passes the exam validates their proficiency in managing and tuning the Oracle Database to maximize its efficiency and performance. Oracle Database 19c Performance and Tuning Management certification also enhances the candidate's credibility and job prospects in a highly competitive job market. Oracle Database 19c Performance and Tuning Management certification exam is ideal for professionals seeking to advance their career to higher levels of responsibility in database administration, development, and management roles in enterprises worldwide.
NEW QUESTION # 14
You execute the following:
EXECUTE DBMS_AuTO_TASK_ADMIN.DISABLE;
Which advisor remains enabled?
Answer: C
Explanation:
When you executeDBMS_AUTO_TASK_ADMIN.DISABLE, it disables all automated maintenance tasks related to the Auto Task framework. This includes tasks such as the Automatic SQL Tuning Advisor, Automatic Segment Advisor, and others. However, the Automatic Optimizer Statistics Collection (D) remains enabled as it is not part of the Auto Task framework. The gathering of optimizer statistics is controlled separately and is a critical part of the database's self-tuning mechanism to ensure the optimizer has up-to-date information about the data distribution within tables and indexes.
References
* Oracle Database 19c PL/SQL Packages and Types Reference - DBMS_AUTO_TASK_ADMIN
* Oracle Database 19c Database Administrator's Guide - Managing Optimizer Statistics
NEW QUESTION # 15
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?
Answer: D
Explanation:
The execution plan shows a full table access for the SALES table. To reduce the execution time, creating an index on SALES.TIME_ID would 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 the ORDER BY clause, the optimizer can take advantage of the index to efficiently sort and limit the result set to the ten most recent sales.
* B (Incorrect): Replacing FETCH FIRST with ROWNUM would 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 the ORDER BY column.
* E (Incorrect): Creating an index on SALES.CUST_ID could improve join performance but would not address the performance issue caused by the lack of an index on the ORDER BY column.
References:
* Oracle Database SQL Tuning Guide: Managing Indexes
* Oracle Database SQL Tuning Guide: Using Indexes and Clusters
NEW QUESTION # 16
What are the least elevated values of statistics_level and C0NTR0LJ4ANAGEMENT_PACK_ACCESS that allow the usage of Monitoring of Database Operations?
Answer: D
Explanation:
Monitoring of Database Operations requires that theSTATISTICS_LEVELparameter be set toALLand CONTROL_MANAGEMENT_PACK_ACCESSbe set toDIAGNOSTIC+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
NEW QUESTION # 17
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?
Answer: A
Explanation:
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 a session 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
NEW QUESTION # 18
Which two statements are true about the use and monitoring of Buffer Cache Hit ratios and their value in tuning Database I/O performance?
Answer: A,D
NEW QUESTION # 19
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