- A
Pie chart
Why wrong: Pie charts show proportions but not sequential addition or subtraction.
- B
Stacked bar chart
Why wrong: Stacked bar charts can show composition but not the cumulative effect of additions and subtractions.
- C
Area chart
Why wrong: Area charts show cumulative trends over time, not decomposition of a single value.
- D
Waterfall chart
Waterfall charts illustrate the step-by-step progression from starting to ending value, perfect for financial breakdowns.
Question 421 of 1,000
DA0-001 Visualising Data Practice Question
This DA0-001 practice question tests your understanding of visualising data. Compare every option against the stated constraints before choosing — the best answer satisfies all requirements, not just the most obvious one. 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.
A financial analyst wants to create a dashboard that shows the monthly profit and loss, highlighting how each component (revenue, cost of goods sold, operating expenses) contributes to the final net profit. Which chart type is most appropriate?
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
✓
Waterfall chart
A waterfall chart effectively shows how each incremental positive or negative value contributes to a final total, making it ideal for profit/loss breakdowns.
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.
- ✗
Pie chart
Why it's wrong here
Pie charts show proportions but not sequential addition or subtraction.
- ✗
Stacked bar chart
Why it's wrong here
Stacked bar charts can show composition but not the cumulative effect of additions and subtractions.
- ✗
Area chart
Why it's wrong here
Area charts show cumulative trends over time, not decomposition of a single value.
- ✓
Waterfall chart
Why this is correct
Waterfall charts illustrate the step-by-step progression from starting to ending value, perfect for financial breakdowns.
Related concept
OSPF neighbours must agree on key parameters.
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
Pie charts show proportions but not sequential addition or subtraction.
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 DA0-001 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 DA0-001 OSPF questions on adjacency and route selection.
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Visualising Data — study guide chapter
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FAQ
Questions learners often ask
What does this DA0-001 question test?
Visualising Data — This question tests Visualising Data — OSPF neighbours must agree on key parameters..
What is the correct answer to this question?
The correct answer is: Waterfall chart — A waterfall chart effectively shows how each incremental positive or negative value contributes to a final total, making it ideal for profit/loss breakdowns.
What should I do if I get this DA0-001 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 DA0-001 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 DA0-001 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 DA0-001 exam.
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