Download Oracle Database 19c: Performance Management and Tuning.1z0-084.PremiumDumps.2025-10-14.44q.vcex

Vendor: Oracle
Exam Code: 1z0-084
Exam Name: Oracle Database 19c: Performance Management and Tuning
Date: Oct 14, 2025
File Size: 2 MB
Downloads: 6
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Demo Questions

Question 1
The CURSOR_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? (Choose two.)
  1. Create the KEEP cache and cache tables accessed by the SQL statements.
  2. Create the RECYCLE cache and cache tables accessed by the SQL statements.
  3. Increase the size of the library cache.
  4. Set OPTIMIZER_CAPTURE_SQL_PLAN_BASELINES to TRUE.
  5. Set the CURSOR_SHARING parameter to FORCE.
Correct answer: CE
Question 2
Which three types of statistics are captured by Statspack with snap level 6? (Choose three.)
  1. Parent and child latches
  2. Parent and child latches
  3. Optimizer execution plans
  4. Plan usage data
  5. Enqueue statistics
  6. Segment-level statistics
Correct answer: CDE
Explanation:
CDE: 2 - MostedCDF: 1
CDE: 2 - MostedCDF: 1
Question 3
You execute the following:
EXECUTE DBMS_AUTO_TASK_ADMIN.DISABLE;
Which advisor remains enabled?
  1. Automatic SQL Tuning
  2. SQL Plan Management Evolve Advisor
  3. Optimizer Statistics Advisor
  4. Automatic Optimizer Statistics Collection
  5. Automatic Segment Advisor
Correct answer: D
Explanation:
B: 1D: 2 - Mosted
B: 1D: 2 - Mosted
Question 4
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? (Choose two.)
  1. recommendations regarding the creation of additional indexes
  2. recommendations regarding rewriting the SQL statements
  3. recommendations regarding the creation of materialized views
  4. recommendations regarding the creation of SQL Patches
  5. recommendations regarding partitioning the tables
Correct answer: AB
Explanation:
AB: 3 - Mosted
AB: 3 - Mosted
Question 5
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?
  1. eng: SQ - contention
  2. eng: TM - contention
  3. eng: HW - contention
  4. eng: TX - allocate ITL entry
Correct answer: C
Explanation:
C: 3 - Mosted
C: 3 - Mosted
Question 6
Which two types of performance problems are reported by ADDM for PDBs? (Choose two.)
  1. I/O capacity limits
  2. Excessive checkpoint writes
  3. SGA sizing issues
  4. Top SQL statements
  5. User I/O waits
Correct answer: DE
Explanation:
DE: 3 - Mosted
DE: 3 - Mosted
Question 7
What is the right time to stop tuning an Oracle database?
  1. When the allocated budget for performance tuning has been exhausted
  2. When all the concurrency waits are eliminated from the Top 10
  3. When the buffer cache and library cache hit ratio is above 95%
  4. When the I/O is less than 10% of the DB time
  5. When the tuning goal has been met
Correct answer: E
Explanation:
E: 2 - Mosted
E: 2 - Mosted
Question 8
Database performance degraded between 23:15 and 23:30 for the last three nights. The AWR snapshot interval is one hour. The ADDM report contains nothing about this performance problem.
With which tool can you further analyze this problem?
  1. SQL Performance Analyzer
  2. AWR Compare Periods report
  3. SQL Tuning Advisor
  4. Active Session History report
Correct answer: D
Explanation:
D: 2 - Mosted
D: 2 - Mosted
Question 9
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?
  1. COLUMN STORE COMPRESS FOR QUERY LOW
  2. ROW STORE COMPRESS
  3. ROW STORE COMPRESS ADVANCED
  4. COLUMN STORE COMPRESS FOR QUERY HIGH
Correct answer: C
Explanation:
C: 3D: 2
C: 3D: 2
Question 10
Examine this output of a query of V$PGA_TARGET_ADVICE:
Which statements is true?
  1. With a target of 700 MB or more, all multipass executions work areas would be eliminated.
  2. PGA_AGGREGATE_TARGET should be set to at least 800 MB
  3. PGA_AGGREGATE_TARGET should be set to at least 700 MB.
  4. With a target of 800 MB or more, all one-pass execution work areas would be eliminated.
Correct answer: B
Explanation:
B: 2
B: 2
Question 11
Examine this statement and its corresponding execution plan:
Which phase introduces the CONCATENATION step?
  1. SQL Semantic Check
  2. SQL Execution
  3. SQL Row Source Generation
  4. SQL Transformation
  5. SQL Adaptive Execution
Correct answer: D
Explanation:
D: 1
D: 1
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