2024 Easy Success Oracle 1z1-084 Exam in First Try [Q26-Q47]

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2024 Easy Success Oracle 1z1-084 Exam in First Try

Best 1z1-084 Exam Dumps for the Preparation of Latest Exam Questions

NEW QUESTION 26
This error occurred more than four hours ago in the database:
ORA-04036 PGA memory used by theinstance exceedsPGA_AGGREGATE_LIMIT
You want to know which process and query were at fault.
Which two views should you use for this purpose?

DBA_HIST_ACTIVE_SESS_HISTORY

DBA_HIST_SQLSTAT

DBA_HIST_SQLTEXT

DBA_HIST_PGASTAT

DBA_HIST_PROCESS_MEM_SUMMARY

NEW QUESTION 27
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?

Create an index on SALES.TIME_ID to force the return of rows in the order specified by the ORDER BY clause.

Replace the FETCH FIRST clause with ROWNUM to enable the use of an index on SALES.

Collect a new set of statistics on PRODUCT, CUSTOMERS, and SALES because the current stats are inaccurate.

Enable Adaptive Plans so that Oracle can change the Join method as well as the Join order for this query.

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.

NEW QUESTION 28
What is the right time to stop tuning an Oracle database?

When the allocated budget for performance tuning has been exhausted

When all the concurrency waits are eliminated from the Top 10

When the buffer cache and library cache hit ratio is above 95%

When the I/O is less than 10% of the DB time

NEW QUESTION 29
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?

Set the parameter OPTIMIZER_ADAPTIVE_STATISTICS to FALSE.

Use DBMS_AUTO_TASK_ADMIN. DISABLE to disable the AUTO_STATS_ADVISOR_TASK task.

Set the AUTO_STATS_ADVISOR_TASK global statistics preference to FALSE.

Use DBMS STATS.DROP ADVISOR TASK to drop the AUTO_STATS_ADVISOR_TASK task.

NEW QUESTION 30
You use SQL Tuning Advisor to tune a given SQL statement.
The analysis eventually results in the implementation of a SQL Profile.
You then generate the new SQL Profile plan and enforce it using a SQL PlanBaselinebut forget to disable the SQLProfile and a few days later you find out that the SQL Profile is generating a new execution plan.
Which two statements are true?

The existence of two concurrent plan stability methods generates a child cursor for every execution.

The SQL Profiles as well as SQL Plan Baseline are implemented using hints, so they both generate the same plan.

The execution plan is the one enforced by the SQL Profile.

The execution plan is the one enforced by the SQL Plan Baseline.

The SQL Plan Baseline must be accepted in order to be used for the execution plan.

The conflict between the two plan stability methods results in an error.

NEW QUESTION 31
You must configure and enable Database Smart Flash Cache for a database.
You configure these flash devices:

Examine these parameter settings:

What must be configured so that the database uses these devices for the Database Smart Flash Cache?

Set DB_FLASH_CACHE_SIZE to 192G and MEMORY_TARGET to 256G.

Set DB_FLASH_CACHE_SIZE parameter to 192G.

Disable Automatic Memory Management and set SGA_TARGET to 256G.

Set DB_FLASH_CACHE_SIZE to 256G and change device /dev/sdk to 128G.

Set DB_FLASH_CACHE_SIZE parameter to 128G, 64G.

NEW QUESTION 32
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?

Create the KEEP cache and cache tables accessed by the SQL statements.

Create the RECYCLE cache and cache tables accessed by the SQL statements.

Increase the size of the library cache.

Set OPTIMIZER_CAPTURE_SQL_PLAN_BASELINESto TRUE.

Set the CURSOR_SHARING parameter to FORCE.

NEW QUESTION 33
Database performance has degraded recently.
index range scan operations on index ix_sales_time_id are slower due to an increase in buffer gets on sales table blocks.
Examine these attributes displayed by querying DBA_TABLES:

Now, examine these attributes displayed by querying DBA_INDEXES:

Which action will reduce the excessive buffer gets?

Re-create the SALES table sorted in order of index IX_SALES_TIME_ID.

Re-create index IX_SALES_TIME_ID using ADVANCED COMPRESSION.

Re-create the SALES table using the columns in IX_SALES_TIME_ID as the hash partitioning key.

Partition index IX_SALES_TIME_ID using hash partitioning.

NEW QUESTION 34
Accessing the SALES tables causes excessive db file sequential read wait events.
Examine this AWR except:

Now, examine these attributes displayed by querying dba_tables:

Finally, examine these parameter settings:

Which two must both be used to reduce these excessive waits?

Partition the SALES table.

Increase PCTFREE for the SALES table.

Re-create the SALES table.

Compress the SALES table.

Coalesce all sales table indexes.

NEW QUESTION 35
You want to reduce the amount of db file scattered read that is generated in the database.You execute the SQL Tuning Advisor against the relevant workload. Which two can be part of the expected result?

recommendations regarding partitioning the tables

recommendations regarding the creation of materialized views

recommendations regarding the creation of additional indexes

recommendations regarding rewriting the SQL statements

recommendations regarding the creation of SQL Patches

NEW QUESTION 36
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?

Alert log

ASH report

Session trace file SQL trace file automatically generated by the error

SQL trace file automatically generated by the error

NEW QUESTION 37
You manage a 19c database with default optimizer settings.
This statement is used extensively as subquery in the application queries:
SELECT city_id FROM sh2.sales WHERE city_id=:Bl
You notice the performance of these queries is often poor and, therefore, execute:
SELECT city_id,COUNT(*) FROM sh2.sales GROUP BY city_id;
Examine the results:

There is no index on the CITY_ID column.
Which two options improve the performance?

Generate frequency histograms on the CITY__ID column.

Create an index on the CITY IP column.

Use a SQL Profile to enforce the appropriate plan.

Force the subquery to use dynamic sampling.

Activate the adaptive plans.

NEW QUESTION 38
You need to transport performance data from a Standard Edition to an Enterprise Edition database. What is the recommended method to do this?

Export the data by using expdp from Statspack and import it by using
$ORACLE_HOME/rdbms/admin/awrload into the AWRrepository.

Export the data by using expdp from the ftatspack repository and import it by using impdp into the AWR repository.

Export the data by using the expdp utility and parameter file spuexp.par from the Statspack repository and import it by using impdp into Export the data by using expdp from the Statspack repository and import it by using impdp into the AWR repository.

Export the data by using the exp utility and parameter file spuexp.par from the Statspack repository and import it by using imp into a dedicated Statspack schema on the destination.

NEW QUESTION 39
Which three statements are true about server-generated alerts?

They are notifications from the Oracle Database Server of an existing or impending problem.

They provide notifications but never any suggestions for correcting the identified problems.

They are logged in the alert log.

They can be viewed only from the Cloud Control Database home page.

Their threshold settings can be modified by using DBMS_SERVER_ALERT.

They may contain suggestions for correcting the identified problems.

Server-generated alerts in Oracle Database are designed to notify DBAs and other administrators about issues within the database environment. These alerts can be triggered by a variety of conditions, including threshold-based metrics and specific events such as ORA- error messages. Here’s how these options align with the statements provided:
* A (True):Server-generated alerts are indeed notifications from the Oracle Database Server that highlight existing or impending issues. These alerts are part of Oracle’s proactive management capabilities, designed to inform administrators about potential problems before they escalate.
* C (True):These alerts are logged in the alert log of the Oracle Database. The alert log is a crucial diagnostic tool that records major events and changes in the database, including server-generated alerts.
This log is often the first place DBAs look when troubleshooting database issues.
* F (True):Server-generated alerts may include suggestions for correcting identified problems. Oracle Database often provides actionable advice within these alerts to assist in resolving issues more efficiently. These suggestions can range from adjusting configuration parameters to performing specific maintenance tasks.
Options B, D, and E do not accurately describe server-generated alerts:
* B (False):While the statement might have been true in some contexts, Oracle’s server-generated alerts often include corrective suggestions, making this statement incorrect.
* D (False):Server-generated alerts can be viewed from various interfaces, not just the Cloud Control Database home page. They are accessible through Enterprise Manager, SQL Developer, and directly within the database alert log, among other tools.
* E (False):While it’s true that threshold settings for some alerts can be modified, the method specified, usingDBMS_SERVER_ALERT, is not correct. Threshold settings are typically adjusted through Enterprise Manager or by modifying specific initialization parameters directly.
References:
* Oracle Database Documentation:Oracle Database 19c: Performance Management and Tuning
* Oracle Base: Alert Log and Trace Files
* Oracle Support:Understanding and Managing Server-Generated Alerts

NEW QUESTION 40
Which two options are part of a Soft Parse operation?

SQL Row Source Generation

SQL Optimization

Semantic Check

Shared Pool Memory Allocation

Syntax Check

NEW QUESTION 41
You must produce a consolidated formatted trace file by combining all trace files generated by all clients for a single service.
Which combination of utilities does this?

Trace Analyzer and Tracsess

Trcsess and TKPROF

Autotrace and TKPROF

TKPROF and Trace Analyzer

NEW QUESTION 42
Which application lifecycle phase could be managed reactively?

Design and development

Upgrade or migration

Testing

Production

Deployment

NEW QUESTION 43
Buffer cache access is too frequent when querying the SALES table. Examine this command which executes successfully:
ALTER TABLE SALES SHRINK SPACE;
For which access method does query performance on sales improve?

db file scattered read

db file sequential read

index full scan

index range scan

NEW QUESTION 44
Which two statements are true about session wait information contained in v$session or v$session_wait?

Rows for sessions displaying WAITED UNKNOWN TIME in the STATE column indicate that the session is still waiting.

Rows for sessions that are currently waiting have a wait time of 0.

Rows for sessions that are not waiting might contain the actual wait time for the last event for which they waited.

Rows for sessions that are currently waiting have their wait time incremented every microsecond.

Rows for sessions that are not waiting always contain the total wait time since the session started.

NEW QUESTION 45
Which two statements are true about cursor sharing?

Setting Cursor_sharing to FORCE can result in a plan that is suboptimal for the majority of values bound to a bind variable when executing a cursor with one or more bind variables.

Adaptive Cursor Sharing guarantees that a suboptimal plan will never be used on any execution of a SQL statement.

Setting optimizer_capture_sql_plan_baselines to TRUE loads all adaptive plans for the same statement into the cursor cache.

Setting cursor_sharing to EXACT prevents Adaptive Cursor Sharing from being used.

Adaptive Cursor Sharing requires histograms on filtered columns, used in equality predicates, to allow different execution plans to be generated for statements whose bound values would normally generate different plans at hard parse time.

NEW QUESTION 46
Which Optimizer component helps decide whether to use a nested loop join or a hash join in an adaptive execution plan?

Statistics Feedback

SQL Plan Directives

Statistics Collector

Automatic Reoptimization

Dynamic Statistics

NEW QUESTION 47
Which two options are part of a Soft Parse operation?

Syntax Check

SQL Row Source Generation

SQL Optimization

Shared Pool Memory Allocation

Semantic Check

To pass the Oracle 1Z0-084 exam, candidates must have a strong understanding of Oracle Database 19c architecture and features, as well as experience with database performance and tuning management. Candidates should also possess hands-on experience with the Oracle Database 19c platform, which will be tested through a series of multiple-choice questions and performance-based scenarios. Upon passing the exam, professionals will earn the Oracle Certified Specialist (OCS) certification, demonstrating their expertise in Oracle Database 19c performance and tuning management. Oracle Database 19c Performance and Tuning Management certification can help professionals advance their careers and differentiate themselves in the competitive job market.

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