[Oct 21, 2026] Get New 1Z0-084 Practice Test Questions Answers [Q32-Q55]

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[Oct 21, 2026] Get New 1Z0-084 Practice Test Questions Answers

1Z0-084 Dumps and Exam Test Engine

Oracle 1Z0-084 Exam Syllabus Topics:

Section	Objectives
Tune I/O and Storage Performance	– Optimize database storage operations 1. Configure table compression 2. Tune ASM performance 3. Reduce I/O bottlenecks
Use Basic Tuning Methodology and Diagnostics Tools	– Identify performance issues 1. Analyze wait events 2. Interpret ADDM and AWR reports 3. Use Statspack reports
Tune SQL Statements	– Improve SQL execution efficiency 1. Interpret execution plans 2. Use SQL Plan Management 3. Use SQL Tuning Advisor 4. Manage optimizer statistics
Use Performance Monitoring Features	– Monitor database health 1. Monitor active sessions 2. Analyze historical performance data 3. Use server-generated alerts
Optimize Memory Usage	– Tune memory structures 1. Tune buffer cache 2. Manage PGA and SGA 3. Optimize shared pool usage
Manage Database Resource Usage	– Control workload and resources 1. Monitor sessions and processes 2. Manage concurrency issues 3. Use Resource Manager

NO.32 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.

NO.33 Examine this code block, which executes successfully:
DBMS_SERVER_ALERT. SET_THRESHOLD (
DBMS_SERVER_ALERT.CPU_TIME_PER_CALL, DBMS_SERVER_ALERT. OPERATOR_GE, ‘8000’, DBMS_SERVER_ALERT.OPERATOR_GE, ‘10000’, 1, 2, ‘inst1’, DBMS_SERVER_ALERT.OBJECT_TYPE_SERVICE, ‘main.regress.rdbms.dev.us.example.com’) ;

What will happen?

A warning alert will be issued when CPU time exceeds 1 minute for each user call.

A critical alert will be issued when CPU time exceeds 10000 microseconds for each user call.

A warning alert will be issued only when CPU time exceeds 10000 microseconds for each user call.

A critical alert will be issued when CPU time exceeds 2 minutes for each user call.

NO.34 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.

NO.35 A database supporting a mixed workload is hosted on a server with 64 CPUs.
A large number of free buffer waits and buffer busy waits occur affecting performance.
The buffer cache size was then increased but after a few hours, the same wait events occur more often than before the change.
Examine these parameter settings:

Which two actions can help reduce the number of these waits7

increasing the value of DB_FILE_MULTIBLOCK_READ_COUNT to 128

Increasing the size of MEMORYTARGET

setting dbwr_io_slaves to 64

increasing the value of DBWRITERPROCESSES to 64,

reducing the values of DB_FILE_MULTILOCK_READ_COUNT to 64

NO.36 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?

NO.37 Which procedure gathers statistics that are always used in the generation of any execution plan?

DBMS_STATS.GATHER_DICTIONARY_STATS

DBMS_STATS.GATHER_FIXED_ OBJECTS_STATS

DBMS_STATS.GATHER_DATABASE_STATS

DBMS_STATS.GATHER_SYSTEM_STATS

NO.38 Examine this statement and its corresponding execution plan:

Which phase introduces the CONCATENATION step?

SQL Semantic Check

SQL Execution

SQL Row Source Generation

SQL Transformation

SQL Adaptive Execution

NO.39 Which two statements are true about the use and monitoring of Buffer Cache Hit ratios and their value in tuning Database I/O performance?

A 99% cache hit ratio can be observed for database instances which have very poor I/O performance.

A 60% cache hit ratio can be observed for database instances which have very good I/O performance.

The performance of workloads that primarily generate full table scans and fast full index scans are always affected by the cache hit ratio.

The buffer cache advisory view v$db_cache_advice provides advice on cache hit ratios appropriate for the instance workload.

Both the RECYCLE and KEEP buffer caches should always have a very high cache hit ratio.

NO.40 Examine this statement and output:

Which two situations can trigger this error?

The user lacks the required privileges to execute the DBMS WORKLOAD CAPTURE package or the directory.

There is a file in the capture directory.

The syntax is incomplete.

The capture directory is part of the root file system.

The instance is unable to access the capture directory.

NO.41 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

NO.42 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.

NO.43 Examine this statement and its corresponding execution plan:

Which phase introduces the CONCATENATION step?

SQL Semantic Check

SQL Execution

SQL Row Source Generation

SQL Transformation

SQL Adaptive Execution

NO.44 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

NO.45 Which three types of statistics are captured by statspack with snap level 6?

Parent and child latches

Optimizer execution plans

Plan usage data

Enqueue statistics

Segment-level statistics

NO.46 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_BASELINES to TRUE.

Set the CURSOR_SHARING parameter to FORCE.

NO.47 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 purgedautomatically after every 60 mins.

AWR snapshots can be purged manually in pluggable databases.

NO.48 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

NO.49 During which application lifecycle phase do you take baselines?

Testing

Migration or upgrade

Design and development

Deployment

Production

NO.50 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.

NO.51 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

NO.52 A Standard Edition production database has performance problems for two hours on the same day each week.
Which tool must you use to diagnose the problem?

SQL Performance Analyzer

AWR Compare Periods report

Database Replay

Statspack report

NO.53 A database instance is suffering poor I/O performance on two frequently accessed large tables.
No Big Table caching occurs in the database.
Examine these parameter settings:

Which are two actions either one of which will allow Big Table caching to occur?

Increasing DB_BIG_TABLE_CACHE_PERCENT_TARGET to at least 50

Setting DB_KEEP_CACHE_SIZE to at least 50M

Increasing DB_BIG_TABLE_CACHE_PERCENT_TARGET to at least 25

Increasing DB_CACHESIZE to 1 G

Setting PARALLEL_DEGREE_POLICYADAPTIVE

Setting PARALLEL_DEGREE_POLICYAUTO

NO.54 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?

ALTER SYSTEM SET CURSOR_SHARING = FORCE;

ALTER SYSTEM SET CURSOR_SPACE_FOR_TIME – TRUE;

ALTER SYSTEM SET CURSOR_INVALIDATION = DEFERRED;

ALTER SYSTEM SET SESSION CACHED CURSORS = 500;

NO.55 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.

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[Oct 21, 2026] Get New 1Z0-084 Practice Test Questions Answers [Q32-Q55]

Oracle 1Z0-084 Exam Syllabus Topics:

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