PASS GUARANTEED QUIZ NEWEST ORACLE - 1Z1-084 ACCURATE PREP MATERIAL

Pass Guaranteed Quiz Newest Oracle - 1z1-084 Accurate Prep Material

Pass Guaranteed Quiz Newest Oracle - 1z1-084 Accurate Prep Material

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If you are one of such frustrated candidates, don't get panic. ITExamDownload declares its services in providing the real 1z1-084 PDF Questions. It ensures that you would qualify for the Oracle Database 19c Performance and Tuning Management (1z1-084) certification exam on the maiden strive with brilliant grades. ITExamDownload has formulated the Oracle Database 19c Performance and Tuning Management (1z1-084) product in three versions. You will find their specifications below to understand them better.

The topics covered in the Oracle 1Z0-084 certification exam include managing and optimizing database memory and storage, managing database performance with SQL tuning and performance tools, managing database performance with resource manager and database resource usage, and managing database performance with automatic workload repository and SQL tuning advisor.

Oracle 1Z0-084 exam is designed to test an individual's knowledge and skills in Oracle Database 19c Performance and Tuning Management. 1z1-084 Exam is intended for IT professionals who have experience working with Oracle Database 19c and want to validate their skills in performance tuning and management. 1z1-084 exam is also suitable for professionals who are looking to enhance their career prospects in the field of database management.

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Aspiring Oracle professionals strive to excel in Oracle 1z1-084 exams such as the Oracle Database 19c Performance and Tuning Management (1z1-084) to achieve their dream careers. However, passing the 1z1-084 Exam can be challenging, especially with a demanding schedule that leaves little time for preparation.

Oracle 1Z0-084 exam is designed for IT professionals who are interested in becoming Oracle Database 19c Performance and Tuning Management experts. Oracle Database 19c Performance and Tuning Management certification exam tests the candidate's knowledge and skills in implementing and managing performance tuning solutions for Oracle Database 19c. It covers various performance tuning features and tools, as well as best practices for tuning the database and its components.

Oracle Database 19c Performance and Tuning Management Sample Questions (Q11-Q16):

NEW QUESTION # 11
Examine this statement and its corresponding execution plan:

Which phase introduces the CONCATENATION step?

  • A. SQL Execution
  • B. SQL Semantic Check
  • C. SQL Transformation
  • D. SQL Adaptive Execution
  • E. SQL Row Source Generation

Answer: C

Explanation:
The CONCATENATION step in an execution plan is introduced during the SQL Transformation phase. This phase is part of the optimizer's query transformations which can include various techniques to rewrite the query for more efficient execution. The CONCATENATION operation is used to combine the results of two separate SQL operations, typically when there is an OR condition in the WHERE clause, as seen in the provided query.
References:
* Oracle Database SQL Tuning Guide, 19c
* Oracle Database Concepts, 19c


NEW QUESTION # 12
Users complain about slowness and session interruptions. Additional checks reveal the following error in the application log:

Which file has additional information about this error?

  • A. Session trace file SQL trace file automatically generated by the error
  • B. SQL trace file automatically generated by the error
  • C. ASH report
  • D. Alert log

Answer: D

Explanation:
When an ORA-00060 deadlock error occurs, detailed information about the error and the deadlock graph are dumped into the alert log. This log contains a trace file name that you can use to find additional detailed information about the sessions involved in the deadlock and the SQL statements they were executing.
References:
* Oracle Database Administrator's Guide, 19c
* Oracle Database Error Messages, 19c


NEW QUESTION # 13
Which Optimizer component helps decide whether to use a nested loop join or a hash join in an adaptive execution plan?

  • A. Automatic Reoptimization
  • B. Statistics Feedback
  • C. SQL Plan Directives
  • D. Statistics Collector
  • E. Dynamic Statistics

Answer: D

Explanation:
In an adaptive execution plan, the Optimizer makes runtime decisions between nested loop and hash joins using a statistics collector. The collector is a row source that collects statistics about the rows it processes and can adapt the plan based on the number of rows processed.
References:
* Oracle Database SQL Tuning Guide, 19c


NEW QUESTION # 14
Which two statements are true about Data Pump import for objects that used the in Memory (IM) column store in their source database?

  • A. It always gives preference to the IM column store clause defined at the tablespace level over table-level definitions.
  • B. Its TRANSFORM clause can be used to add the INMEMORV clause to exported tables that lack them.
  • C. It can generates the INMEMORY clause that matches the table settings at export time.
  • D. Its INMEM0RY_CLAUSE of the Data Pump Export allows modifications to IM column store clause of a table with existing INMEMORY setting.
  • E. It must always transports existing INMEMORY attributes.
  • F. It ignores the IM column store clause of the exporting objects.

Answer: B,C

Explanation:
When importing objects that used the In-Memory (IM) column store in their source database using Oracle Data Pump, the following statements are true:
* D (Correct):TheTRANSFORMclause can be used to alter object creation DDL during import operations. This can include adding theINMEMORYclause to tables that were not originally using the IM column store.
* F (Correct):The import operation can preserve theINMEMORYattributes of tables as they were at the time of export, effectively replicating the IM column store settings from the source database.
The other statements are not accurate in the context of Data Pump import:
* A (Incorrect):Data Pump does not give preference to the IM column store clauses at the tablespace level over table-level definitions unless explicitly specified by theTRANSFORMclause.
* B (Incorrect):While Data Pump can transport existingINMEMORYattributes, it is not mandatory. It is controlled by theINCLUDEorEXCLUDEData Pump parameters or theTRANSFORMclause.
* C (Incorrect):TheINMEMORY_CLAUSEparameter is not part of the Data Pump Export utility. To modify the IM column store clauses, you would use theTRANSFORMparameter during import, not export.
* E (Incorrect):Data Pump does not ignore the IM column store clause unless specifically instructed to do so via theEXCLUDEparameter.
References:
* Oracle Database Utilities:Data Pump Export
* Oracle Database Utilities:Data Pump Import


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?

  • A. Enable Adaptive Plans so that Oracle can change the Join method as well as the Join order for this query.
  • B. Collect a new set of statistics on PRODUCT, CUSTOMERS, and SALES because the current stats are inaccurate.
  • C. Create an index on SALES.CUST_ID to force an INDEX RANGE SCAN on this index followed by a NESTED LOOP join between CUSTOMERS and SALES.
  • D. Create an index on SALES.TIME_ID to force the return of rows in the order specified by the ORDER BY clause.
  • E. Replace the FETCH FIRST clause with ROWNUM to enable the use of an index on SALES.

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
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