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Prepare for the Oracle Database 19c: Performance Management and Tuning exam with our extensive collection of questions and answers. These practice Q&A are updated according to the latest syllabus, providing you with the tools needed to review and test your knowledge.
QA4Exam focus on the latest syllabus and exam objectives, our practice Q&A are designed to help you identify key topics and solidify your understanding. By focusing on the core curriculum, These Questions & Answers helps you cover all the essential topics, ensuring you're well-prepared for every section of the exam. Each question comes with a detailed explanation, offering valuable insights and helping you to learn from your mistakes. Whether you're looking to assess your progress or dive deeper into complex topics, our updated Q&A will provide the support you need to confidently approach the Oracle 1Z0-084 exam and achieve success.
The questions for 1Z0-084 were last updated on Apr 19, 2026.
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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?
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 from running and thus reduce space usage in the SYSAUX tablespace. Reference:
Oracle Database PL/SQL Packages and Types Reference, 19c
An Oracle 19c database uses default values for all optimizer initialization parameters.
After a table undergoes partition maintenance, a large number of wait events occur for:
cursor: pin S wait on X
Which command reduces the number of these wait events?
The cursor: pin S wait on X wait event suggests contention for a cursor pin, which is associated with mutexes (a type of locking mechanism) that protect the library cache to prevent concurrent modifications. This issue can often be alleviated by deferring the invalidation of cursors until the end of the call to reduce contention. The correct command to use would be:
C (Correct): ALTER SYSTEM SET CURSOR_INVALIDATION=DEFERRED; This setting defers the invalidation of dependent cursors until the end of the PL/SQL call, which can reduce the cursor: pin S wait on X wait events.
The other options are incorrect in addressing this issue:
A (Incorrect): Setting CURSOR_SHARING to FORCE makes the optimizer replace literal values with bind variables. It doesn't address the contention for cursor pins directly.
B (Incorrect): CURSOR_SPACE_FOR_TIME=TRUE aims to reduce the parsing effort by keeping cursors for prepared statements open. It may increase memory usage but does not directly resolve cursor: pin S wait on X waits.
D (Incorrect): Increasing SESSION_CACHED_CURSORS caches more session cursors but doesn't necessarily prevent the contention indicated by the cursor: pin S wait on X wait events.
Oracle Database Reference: CURSOR_INVALIDATION
Oracle Database Performance Tuning Guide: Reducing Cursor Invalidation
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?
In Oracle Database, the V$SESSION_LONGOPS view provides insights into various operations within the database that are expected to take more than six seconds to complete. These include operations related to RMAN (Recovery Manager), such as database duplication tasks. This view displays information about the progress of these long-running operations, including the start time, elapsed time, and estimated time to completion.
When an RMAN session is performing a database duplication and is observed to be slower than usual, checking the V$SESSION_LONGOPS view can give an approximation of when the RMAN operation might complete. This view includes fields like TIME_REMAINING and ELAPSED_SECONDS that help in estimating the completion time of the operation based on its current progress.
Oracle Database Reference: V$SESSION_LONGOPS
Oracle Database Backup and Recovery User's Guide: Monitoring RMAN Jobs
Examine this AWR report excerpt:
You must reduce the impact of database I/O, without increasing buffer cache size and without modifying the SQL statements.
Which compression option satisfies this requirement?
To reduce the impact of database I/O without increasing the size of the buffer cache and without modifying SQL statements, you can use table compression. Among the given options, ROW STORE COMPRESS ADVANCED is the most suitable form of table compression to satisfy this requirement.
Advanced row compression (ROW STORE COMPRESS ADVANCED) is designed to work well with all supported types of data, whether it's OLTP or data warehouse environments. It offers a higher level of compression than basic table compression (ROW STORE COMPRESS BASIC) without significant overhead during DML operations. This feature can help reduce the amount of I/O required to retrieve data by storing it more efficiently on disk.
A, B, D: While COLUMN STORE COMPRESS FOR QUERY HIGH and ROW STORE COMPRESS are both valid compression types, COLUMN STORE COMPRESS FOR QUERY HIGH applies to the In-Memory column store and is not available in all versions and editions, and ROW STORE COMPRESS is less advanced than ROW STORE COMPRESS ADVANCED.
Which two statements are true about Data Pump import for objects that used the in Memory (IM) column store in their source database?
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): The TRANSFORM clause can be used to alter object creation DDL during import operations. This can include adding the INMEMORY clause to tables that were not originally using the IM column store.
F (Correct): The import operation can preserve the INMEMORY attributes 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 the TRANSFORM clause.
B (Incorrect): While Data Pump can transport existing INMEMORY attributes, it is not mandatory. It is controlled by the INCLUDE or EXCLUDE Data Pump parameters or the TRANSFORM clause.
C (Incorrect): The INMEMORY_CLAUSE parameter is not part of the Data Pump Export utility. To modify the IM column store clauses, you would use the TRANSFORM parameter during import, not export.
E (Incorrect): Data Pump does not ignore the IM column store clause unless specifically instructed to do so via the EXCLUDE parameter.
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