New 1Z0-084 Exam Test, 1Z0-084 Reliable Exam Cost

Rated:

, 0 Comments

Total visits: 0

Posted on: 03/31/25

P.S. Free 2025 Oracle 1Z0-084 dumps are available on Google Drive shared by ITCertMagic: https://drive.google.com/open?id=1EVDSKTrkl5nBbTi5BuFjRaLc6Lnjeo3M

We are committed to providing our customers with the most up-to-date and accurate Oracle Database 19c Performance and Tuning Management (1Z0-084) preparation material. That's why we offer free demos and up to 1 year of free Oracle Dumps updates if the 1Z0-084 certification exam content changes after purchasing our product. With these offers, our customers can be assured that they have the latest and most reliable prepare for your Oracle Database 19c Performance and Tuning Management (1Z0-084) preparation material.

Oracle 1Z0-084 exam is divided into four main sections that cover a wide range of topics. The first section, Oracle Database Performance Tuning Concepts, covers the basics of Oracle Database 19c performance tuning architecture, memory, and storage management. The second section, Database Resource Management, covers topics such as the automatic database diagnostic monitor, Oracle database time model, and the Resource Manager.

The Oracle 1Z0-084 Exam covers a wide range of topics related to performance and tuning management. These topics include database performance tuning, performance monitoring, SQL tuning, indexing strategies, and more. Candidates are expected to have a strong understanding of these topics and be able to apply their knowledge to real-world situations.

>> New 1Z0-084 Exam Test <<

1Z0-084 Reliable Exam Cost | 1Z0-084 Latest Test Cost

Since the software keeps a record of your attempts, you can overcome mistakes before the 1Z0-084 final exam attempt. Knowing the style of the Oracle 1Z0-084 examination is a great help to pass the test and this feature is one of the perks you will get in the desktop practice exam software.

Oracle Database 19c Performance and Tuning Management Sample Questions (Q34-Q39):

NEW QUESTION # 34
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 require all database data to fit in memory to improve query performance.
C. It can improve OLTP workload performance by avoiding the use of indexes.
D. It does not improve performance for queries that use join groups on columns from different tables.
E. It does not improve performance for queries using user-defined virtual column results.
F. It does not improve performance for queries using cached results of function evaluations on columns from the same table.

Answer: A,B,C

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 # 35
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. 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.
B. Enable Adaptive Plans so that Oracle can change the Join method as well as the Join order for this query.
C. Create an index on SALES.TIME_ID to force the return of rows in the order specified by the ORDER BY clause.
D. Collect a new set of statistics on PRODUCT, CUSTOMERS, and SALES because the current stats are inaccurate.
E. Replace the FETCH FIRST clause with ROWNUM to enable the use of an index on SALES.

Answer: C

Explanation:
The execution plan shows a full table access for theSALEStable. To reduce the execution time, creating an index onSALES.TIME_IDwould 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 theORDER BYclause, the optimizer can take advantage of the index to efficiently sort and limit the result set to the ten most recent sales.
* B (Incorrect):ReplacingFETCH FIRSTwithROWNUMwould 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 theORDER BYcolumn.
* E (Incorrect):Creating an index onSALES.CUST_IDcould improve join performance but would not address the performance issue caused by the lack of an index on theORDER BYcolumn.
References:
* Oracle Database SQL Tuning Guide:Managing Indexes
* Oracle Database SQL Tuning Guide:Using Indexes and Clusters

NEW QUESTION # 36
Which two statements are true about space usage in temporary tablespaces?

A. When a global temporary table instantiation is too large to fit in memory, space is allocated in a temporary tablespace.
B. When a session consumes all temporary tablespace storage, then the session would hang until the temporary space used by that session is cleared.
C. A sort will fail if a sort to disk requires more disk space and no additional extent can be found/allocated in/for the sort segment.
D. Temporary tablespaces setting Includes quotas to limit temporary space used by a session for that Temporary tablespace.
E. Lack of temporary tablespace space for sort operations can be prevented by using temporary tablespace groups.

Answer: A,E

Explanation:
Regarding space usage in temporary tablespaces, the following statements are true:
* A (Correct): When a global temporary table or a sort operation exceeds the available memory, Oracle Database allocates space in a temporary tablespace to store the temporary data or intermediate results.
* E (Correct): Using temporary tablespace groups can prevent insufficient temporary tablespace for sort operations by providing a collective pool of space from multiple temporary tablespaces, which can be used for user sorting operations.
The other options provided have inaccuracies:
* B (Incorrect): Oracle does not provide a mechanism for setting quotas on temporary tablespaces.
Quotas can be set for permanent tablespaces but not for temporary ones.
* C (Incorrect): A sort operation may fail due to insufficient space, but Oracle will attempt to allocate space in the temporary tablespace dynamically. If no space can be allocated, an error is returned rather than a sort failure.
* D (Incorrect): If a session consumes all available temporary tablespace storage, Oracle will not hang the session; it will return an error to the session indicating that it has run out of temporary space.
References:
* Oracle Database Administrator's Guide: Managing Space for Schema Objects
* Oracle Database Concepts: Temporary Tablespaces

NEW QUESTION # 37
SGA_TARGET and PGA_AGGREGATE_TARGET are configured to nonzero values.
MEMORY_target is then set to a nonzero value but memory_MAX_TARGET is not set.
Which two statements are true?

Answer: A,D

Explanation:
When MEMORY_TARGET is set to a nonzero value, Oracle automatically manages the memory allocation between the System Global Area (SGA) and the Program Global Area (PGA). If MEMORY_MAX_TARGET is not explicitly set, Oracle will behave in the following manner:
* MEMORY_MAX_TARGET will default to the value of MEMORY_TARGET, assuming the platform allows for the value of MEMORY_TARGET to be increased dynamically. This means that MEMORY_TARGET represents both the initial allocation and the maximum limit for the dynamically managed memory unless MEMORY_MAX_TARGET is specified differently.
* If MEMORY_TARGET is set to a value that is less than the sum of the current values of SGA_TARGET and PGA_AGGREGATE_TARGET, Oracle will use the higher sum as the default value for MEMORY_MAX_TARGET to ensure that there is adequate memory for both areas. The database instance will not start if MEMORY_TARGET is not sufficient to accommodate the combined SGA and PGA requirements.
References
* Oracle Database Administrator's Guide 19c: Automatic Memory Management
* Oracle Database Performance Tuning Guide 19c: Using Automatic Memory Management

NEW QUESTION # 38
The CURS0R_SHARING and OPTIMIZER_CAPTURE_SQL_PLAN_BASELINES parameters are set to default. The top five wait events in an awr report are due to a large number of hard parses because of several almost identical SQL statements.
Which two actions could reduce the number of hard parses?

A. Set OPTIMIZER_CAPTURE_SQL_PLAN_BASELINESto TRUE.
B. Create the KEEP cache and cache tables accessed by the SQL statements.
C. Increase the size of the library cache.
D. Create the RECYCLE cache and cache tables accessed by the SQL statements.
E. Set the CURSOR_SHARING parameter to FORCE.

Answer: C,E

Explanation:
To reduce the number of hard parses due to several almost identical SQL statements, you can take the following actions:
* C (Correct):Increasing the size of the library cache can help reduce hard parses by providing more
* memory to store more execution plans. This allows SQL statements to be shared more effectively.
* E (Correct):Setting theCURSOR_SHARINGparameter toFORCEwill cause Oracle to replace literals in SQL statements with bind variables, which can significantly reduce the number of hard parses by making it more likely that similar SQL statements will share the same execution plan.
The other options do not directly impact the number of hard parses:
* A (Incorrect):Creating the KEEP cache and caching tables accessed by the SQL statements can improve performance for those tables, but it does not directly reduce the number of hard parses.
* B (Incorrect):Creating the RECYCLE cache and caching tables accessed by the SQL statements can make it more likely that objects will be removed from the cache quickly, which does not help with hard parse issues.
* D (Incorrect):SettingOPTIMIZER_CAPTURE_SQL_PLAN_BASELINEStoTRUEcan help stabilize SQL execution plans but will not reduce the number of hard parses. This parameter is used to automatically capture SQL plan baselines for repeatable SQL statements, which can prevent performance regressions due to plan changes.
References:
* Oracle Database Performance Tuning Guide:Minimizing Hard Parses
* Oracle Database SQL Tuning Guide:CURSOR_SHARING

NEW QUESTION # 39
......

Getting the Oracle Database 19c Performance and Tuning Management (1Z0-084) certification exam is necessary in order to get a job in your desired tech company. Success in the Oracle Database 19c Performance and Tuning Management certification exam gives you an edge over the others because you will have certified skills. The Oracle Database 19c Performance and Tuning Management (1Z0-084) certification exam badge will make a good impression on the interviewer. Most of the people planning to attempt the Oracle Database 19c Performance and Tuning Management (1Z0-084) exam are confused that how will they prepare and pass Oracle Database 19c Performance and Tuning Management (1Z0-084) exam with good grades.

1Z0-084 Reliable Exam Cost: https://www.itcertmagic.com/Oracle/real-1Z0-084-exam-prep-dumps.html

What's more, part of that ITCertMagic 1Z0-084 dumps now are free: https://drive.google.com/open?id=1EVDSKTrkl5nBbTi5BuFjRaLc6Lnjeo3M

Tags: New 1Z0-084 Exam Test, 1Z0-084 Reliable Exam Cost, 1Z0-084 Latest Test Cost, 1Z0-084 New Study Plan, New 1Z0-084 Exam Pass4sure

Comments

There are still no comments posted ...

Rate and post your comment

Username:
Password:
Forgotten password?

Most Popular

New 1Z0-084 Exam Test, 1Z0-084 Reliable Exam Cost

1Z0-084 Reliable Exam Cost | 1Z0-084 Latest Test Cost

Oracle Database 19c Performance and Tuning Management Sample Questions (Q34-Q39):

Login