UPDATED [2025] Pass Oracle 1z1-084 Exam in First Attempt Guaranteed [Q31-Q55]

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UPDATED [2025] Pass Oracle 1z1-084 Exam in First Attempt Guaranteed

Pass 1z1-084 Exam Latest Practice Questions

Oracle 1Z0-084 is a certification exam that tests the performance and tuning management skills of individuals working with Oracle Database 19c. 1z1-084 exam is designed to assess the knowledge and understanding of the concepts and practices used in managing and optimizing the performance of Oracle databases. Candidates who pass 1z1-084 exam earn the Oracle Database 19c Performance and Tuning Management Certified Expert credential.

Oracle 1Z0-084 (Oracle Database 19c Performance and Tuning Management) Certification Exam is a highly sought-after certification exam for those who want to specialize in performance tuning and management of Oracle Database 19c. Oracle Database 19c Performance and Tuning Management certification exam is designed to test the candidate’s knowledge and skills in managing and tuning the performance of an Oracle Database 19c. 1z1-084 exam covers a wide range of topics including performance tuning methodology, database architecture, SQL tuning, memory management, and more.

Q31. What are the least elevated values of statistics_level and C0NTR0LJ4ANAGEMENT_PACK_ACCESS that allow the usage of Monitoring of Database Operations?

STATISTICS_LEVEL=ALL and
CONTROL_MANAGEMENT_PACK_ACCESS=DIAGOSTIC+TUNING

STATISTICS_LEVEL=BASIC and CONTROL_MANAGEMENT_PACK ACCESS=DIAGOSTIC

STATISTICS_LEVEL=TYPICAL and
CONTROL_MANAGEMENT_PACK_ACCESS-DIAGOSTIC*TUNING

STATISTICS_LEVEL=TYPICAL and CONTROL_MANAGEMENT_PACK_ACCESS=DIAGOSTIC

Q32. You execute the following:
EXECUTE DBMS_AuTO_TASK_ADMIN.DISABLE;
Which advisor remains enabled?

Automatic SQL Tuning

SQL Plan Management Evolve Advisor

Optimizer Statistics Advisor

Automatic Optimizer Statistics Collection

Automatic Segment Advisor

Q33. 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.

Q34. Which two actions can cause invalidation or loss of one or more results in the SQL Query Result Cache?

One or more results were aged out of the result cache.

result_cache_max_size is set dynamically to 0.

A request was made by the RCBG background of a non-RAC database.

A request was made by the RCBG background process in a physical standby database that is opened read only and whose primary has a result cache.

Decreasing the value set for RESULT_CACHE_REMOTE_EXPIRATION.

Q35. Which two statements are true about disabling Automatic Shared Memory Management (ASMM)?

All auto-tuned SGA components are reset to their original user-defined values.

All SGA components excluding fixed SGA and other internal allocations are readjusted immediately after disabling ASMM.

Both SGA_TARGET and SGA_MAX_SIZE must be set to zero.

All SGA components retain their current sizes at the time of disabling.

The SGA size remains unaffected after disabling ASMM.

It requires a database instance restart to take effect.

Q36. Examine this AWRreport 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?

MN STORE COMPRESS FOR QUERY LOW

STORE COMPRESS

ROW STORE COMPRESS ADVANCED

COLUMN STORE COMPRESS FOR QUERY HIGH

Q37. 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.

Q38. 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?

enq: SQ – contention

enq: TM – contention

enq: HW – contention

enq: TX – allocate ITL entry

Q39. Examine these statements and output:

What parameter change activates the generation and use of SQL Plan Directives7

optimizer_features_enable=12.2.0.1

optimizer_capture_sql_plan_baselines_TRUE

optimizer_dynamic_sampling=11

optimizer_adaptive_plans=TRUE

optimizer_adaptive_statistics = TRUE

Q40. You need to collect and aggregate statistics for the ACCTG service and PAYROLL module, and execute:

Where do you find the output of this command?

By viewing V$SERV_MOD_ACT_STATS

In $ORACLE_BASE/diag/rdbms/<db unique name>/<instance name>/trace

By viewing V$SERVICE_STATS

In the current working directory

Q41. 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?

Q42. Which application lifecycle phase could be managed reactively?

Design and development

Upgrade or migration

Testing

Production

Deployment

Q43. 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

Q44. Examine this statement and output:

Which three statements are true?

Both 9822 and 8779 sessions are waiting for operating system resources.

Session 8779 may be waiting due to a network problem.

Session 9857 waited 1354 seconds for another process, which was also waiting for a transaction to end.

Session 9857 is not waiting.

Session 8779 may be waiting for a user or application response.

Session 9822 will always stop waiting if the session that owns the TX enqueue issues a COMMIT statement as session 9822 is the first session in the transaction queue.

Q45. Examine these commands, which execute successfully:

Which statement is true?

AD DM is enabled for all pluggable databases.

ADDM, AWR, and ASH reports can be purged automatically.

AWR- snapshots in all pluggable databases will be purged automatically after every 60 mins.

AWR snapshots can be purged manually in pluggable databases.

Q46. What are the least elevated values of statistics_level and C0NTR0LJ4ANAGEMENT_PACK_ACCESS that allow the usage of Monitoring of Database Operations?

STATISTICS_LEVEL=ALL and
CONTROL_MANAGEMENT_PACK_ACCESS=DIAGOSTIC+TUNING

STATISTICS_LEVEL=BASIC and CONTROL_MANAGEMENT_PACK ACCESS=DIAGOSTIC

STATISTICS_LEVEL=TYPICAL and CONTROL_MANAGEMENT_PACK_ACCESS-
DIAGOSTIC*TUNING

STATISTICS_LEVEL=TYPICAL and CONTROL_MANAGEMENT_PACK_ACCESS=DIAGOSTIC

Q47. Which statement is true about DB time in V$$YS_TIME_MODEL?

DB time is organized as a simple list of statistics and any time period is attributable to only one statistic.

DB time can be many times greater than the elapsed time since the database instance started.

DB tine excludes the time spent waiting for a CPU in the operating system run queue.

DB time includes the time spent executing the RMAN backup and restore command.

Q48. 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 the creation of additional indexes

recommendations regarding rewriting the SQL statements

recommendations regarding the creation of materialized views

recommendations regarding the creation of SQL Patches

recommendations regarding partitioning the tables

Q49. 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.

Q50. Which two statements are true about space usage in temporary tablespaces?

When a global temporary table instantiation is too large to fit in memory, space is allocated in a temporary tablespace.

Temporary tablespaces setting Includes quotas to limit temporary space used by a session for that Temporary tablespace.

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.

When a session consumes all temporary tablespace storage, then the session would hang until the temporary space used by that session is cleared.

Lack of temporary tablespace space for sort operations can be prevented by using temporary tablespace groups.

Q51. 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?

V$SESSION

V$SESSTAT

V$RMAN_BACKUP_JOB_DETAILS

V$SESSION_LONGOPS

Q52. Which two options are part of a Soft Parse operation?

SQL Row Source Generation

SQL Optimization

Semantic Check

Shared Pool Memory Allocation

Syntax Check

Q53. 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

Q54. Which two types of performance problems are reported by ADDM for PDBS?

I/O capacity limits

Excessive checkpoint writes

SGA sizing issues

Top SQL statements

User I/O waits

Q55. 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?