- A
They are based on the 80/20 rule.
The 80/20 rule is the foundation of Pareto analysis.
- B
The bars are arranged in ascending order of frequency.
Why wrong: Bars are arranged in descending order to highlight the most significant.
- C
They are used to prioritize problem causes.
Pareto charts help prioritize by showing the most frequent causes.
- D
They show cause-and-effect relationships.
Why wrong: Cause-and-effect relationships are shown in fishbone diagrams.
- E
They display control limits to identify variations.
Why wrong: Control limits are used in control charts, not Pareto charts.
Question 135 of 1,000
PK0-005 Tools and Documentation Practice Question
This PK0-005 practice question tests your understanding of tools and documentation. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
During a quality audit, the team identifies that defects are concentrated in a few areas. The project manager decides to use a Pareto chart. Which TWO statements are true about Pareto charts?
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
They are based on the 80/20 rule.
Pareto charts are based on the 80/20 rule, showing that 80% of effects come from 20% of causes. Bars are arranged in descending order of frequency. Control limits are for control charts. Cause-and-effect relationships are shown in fishbone diagrams.
Key principle: OSPF neighbour adjacency depends on matching area, hello/dead timers, network type, and authentication — IP reachability alone is not enough.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
They are based on the 80/20 rule.
Why this is correct
The 80/20 rule is the foundation of Pareto analysis.
Related concept
OSPF neighbours must agree on key parameters.
- ✗
The bars are arranged in ascending order of frequency.
Why it's wrong here
Bars are arranged in descending order to highlight the most significant.
- ✓
They are used to prioritize problem causes.
Why this is correct
Pareto charts help prioritize by showing the most frequent causes.
Related concept
OSPF neighbours must agree on key parameters.
- ✗
They show cause-and-effect relationships.
Why it's wrong here
Cause-and-effect relationships are shown in fishbone diagrams.
- ✗
They display control limits to identify variations.
Why it's wrong here
Control limits are used in control charts, not Pareto charts.
Common exam traps
Common exam trap: OSPF can fail even when IP connectivity looks correct
OSPF neighbour formation depends on matching areas, timers, network type, authentication and passive-interface behaviour. Do not choose an answer only because the devices can ping.
Trap categories for this question
Command / output trap
Cause-and-effect relationships are shown in fishbone diagrams.
Detailed technical explanation
How to think about this question
OSPF questions usually test the details that control adjacency and route selection. Read the neighbour state, area, router ID and interface configuration before deciding what is wrong.
KKey Concepts to Remember
- OSPF neighbours must agree on key parameters.
- Router ID selection can affect neighbour relationships and LSDB output.
- OSPF cost influences the preferred path.
- A route can appear in OSPF information but not become the installed route.
TExam Day Tips
- Check area mismatch first when OSPF adjacency fails.
- Review passive interfaces when a network is advertised but no neighbour forms.
- Use show ip ospf neighbor and show ip route clues carefully.
Key takeaway
OSPF neighbour adjacency depends on matching area, hello/dead timers, network type, and authentication — IP reachability alone is not enough.
Real-world example
How this comes up in practice
A practitioner preparing for the PK0-005 exam encounters this exact type of scenario on the job. The correct answer here is not the most general option — it is the best answer for the specific constraint described. OSPF neighbour adjacency depends on matching area, hello/dead timers, network type, and authentication — IP reachability alone is not enough. Real exam questions reward reading the full scenario before eliminating options, because the constraint defines which answer fits.
What to study next
Got this wrong? Here's your next step.
Review OSPF neighbour requirements — matching area type, hello and dead timers, network type, stub flags, and authentication. Study show ip ospf neighbor states (INIT, 2-WAY, FULL). Then practise related PK0-005 OSPF questions on adjacency and route selection.
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FAQ
Questions learners often ask
What does this PK0-005 question test?
Tools and Documentation — This question tests Tools and Documentation — OSPF neighbours must agree on key parameters..
What is the correct answer to this question?
The correct answer is: They are based on the 80/20 rule. — Pareto charts are based on the 80/20 rule, showing that 80% of effects come from 20% of causes. Bars are arranged in descending order of frequency. Control limits are for control charts. Cause-and-effect relationships are shown in fishbone diagrams.
What should I do if I get this PK0-005 question wrong?
Review OSPF neighbour requirements — matching area type, hello and dead timers, network type, stub flags, and authentication. Study show ip ospf neighbor states (INIT, 2-WAY, FULL). Then practise related PK0-005 OSPF questions on adjacency and route selection.
What is the key concept behind this question?
OSPF neighbours must agree on key parameters.
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Last reviewed: Jul 4, 2026
This PK0-005 practice question is part of Courseiva's free CompTIA certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the PK0-005 exam.
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