How should I use these Performance Tuning And Diagnostics practice questions?

Read each scenario carefully and choose your answer before revealing the explanation. Then check why your choice was right or wrong. Repeat until the reasoning feels automatic.

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Performance Tuning And Diagnostics practice questions

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Yes — use the session launcher on this page to start a 10-, 20-, 30- or 50-question session drawn entirely from the Performance Tuning And Diagnostics domain.

Practise Oracle Database 23ai Administrator Professional (OCP, 1Z0-183) (OCP) Performance Tuning And Diagnostics practice questions — original exam-style scenarios with answer choices, explanations, and analysis of common mistakes.

Courseiva uses original exam-style practice questions designed for learning and revision. The goal is to understand the concepts, recognise exam patterns, and improve through explanations — not memorise copied exam dumps.

Reviewed byJohnson Ajibi· MSc IT Security

20 questionsDomain: Performance Tuning And Diagnostics

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What the exam tests

What to know about Performance Tuning And Diagnostics

Performance Tuning And Diagnostics questions test whether you can apply the concept in context, not just recognise a definition.

How the topic appears in realistic exam-style scenarios.

Which detail in the question changes the correct answer.

How to eliminate plausible but wrong options.

How to connect the question back to the wider exam objective.

Watch out for

Common Performance Tuning And Diagnostics exam traps

▸Answering from memory before reading the full scenario.
▸Missing a constraint such as cost, availability, security, scope or command context.
▸Choosing a broad answer when the question asks for the most specific fix.
▸Ignoring why the wrong options are tempting.

Practice set

Performance Tuning And Diagnostics questions

20 questions · select your answer, then reveal the explanation

Question 1easymultiple choice

Read the full Performance Tuning And Diagnostics explanation →

You need to identify the top SQL statements consuming the most CPU resources in an Oracle 23ai database over the last hour. Which tool provides the most direct analysis of this performance issue?

Trap 1: SQL Tuning Advisor

This is for tuning a specific statement, not identifying top consumers.

Trap 2: Active Session History (ASH) report

ASH is better for transient, short-lived performance spikes.

Trap 3: SQL Plan Management

This manages plan evolution, not resource identification.

Study all Performance Tuning And Diagnostics common traps →

A
SQL Tuning Advisor
Why wrong: This is for tuning a specific statement, not identifying top consumers.
B
Automatic Workload Repository (AWR) report
AWR provides historical performance data aggregated over time intervals.
C
Active Session History (ASH) report
Why wrong: ASH is better for transient, short-lived performance spikes.
D
SQL Plan Management
Why wrong: This manages plan evolution, not resource identification.

Performance Tuning And Diagnostics practice questions

What to know about Performance Tuning And Diagnostics

Common Performance Tuning And Diagnostics exam traps

Performance Tuning And Diagnostics questions

You need to identify the top SQL statements consuming the most CPU resources in an Oracle 23ai database over the last hour. Which tool provides the most direct analysis of this performance issue?

To improve performance, you suspect an index is missing. Which advisor should you invoke to get recommendations for new indexes?

You have a query that is performing poorly due to a stale execution plan. You want to lock the current optimal plan to prevent the optimizer from changing it during subsequent runs. What should you do?

You notice that Automatic SQL Plan Management is not evolving your plans as expected. What is the most likely cause?

An application query is failing to use a newly created index. You suspect the optimizer statistics are inaccurate. Which package should you use to gather statistics for this specific table?

You are tuning a complex SQL statement. You want to see the execution plan that the optimizer is currently choosing. Which dynamic performance view is most useful?

Which component of the Oracle Database uses the Automatic Diagnostic Repository (ADR) to store critical errors and performance incidents?

A production database experiences a sudden performance degradation. You want to analyze the last 10 minutes of activity to pinpoint blocked sessions. Which approach is best?

What is the primary function of ADDM in Oracle Database 23ai?

Which parameter controls the frequency of AWR snapshot collection?

You want to capture a specific set of SQL statements and their execution plans to baseline them. Which package allows you to capture plans from the cursor cache?

An application is experiencing high library cache lock contention. Which view is best suited to investigate this specific wait event?

You need to determine why a particular session is experiencing high 'db file sequential read' waits. Which view provides the most detailed information about the specific blocks being read?

You are using SQL Plan Management. What happens when a new execution plan is discovered for a SQL statement that already has a baseline?

You are performing a SQL tuning exercise. How do you create a SQL Tuning Set (STS) to be used as input for the SQL Tuning Advisor?

When reviewing an AWR report, you notice a high value for 'db time'. What does this indicate?

Which view displays the current settings for the AWR retention period?

Which report provides a summary of SQL statements that have the highest 'Elapsed Time'?

You have a query that is being incorrectly optimized because the statistics are not representative of the actual data distribution. What is the best method to handle this without changing the global statistics?

Which procedure in the DBMS_SPM package is used to evolve a SQL plan baseline?

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