- A
A single line chart with all regions overlaid
Why wrong: Overlaying many lines can be cluttered and hard to read.
- B
A bar chart with years on x-axis and regions as grouped bars
Why wrong: Grouped bar charts are better for comparing categories at discrete time points, not trends.
- C
A stacked area chart with all regions
Why wrong: Stacked area charts show cumulative totals, not individual trends.
- D
Small multiples of line charts, one per region
Small multiples facilitate comparison while maintaining clarity.
Question 654 of 1,000
DA0-001 Visualising Data Practice Question
This DA0-001 practice question tests your understanding of visualising data. 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.
A data analyst is creating a report to compare the performance of sales regions across multiple years. The report will be used by regional managers to identify trends. Which visualization approach best supports this?
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
✓
Small multiples of line charts, one per region
Small multiples (trellis charts) allow comparison of multiple time series in a compact, consistent layout, making it easy to spot trends across regions.
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.
- ✗
A single line chart with all regions overlaid
Why it's wrong here
Overlaying many lines can be cluttered and hard to read.
- ✗
A bar chart with years on x-axis and regions as grouped bars
Why it's wrong here
Grouped bar charts are better for comparing categories at discrete time points, not trends.
- ✗
A stacked area chart with all regions
Why it's wrong here
Stacked area charts show cumulative totals, not individual trends.
- ✓
Small multiples of line charts, one per region
Why this is correct
Small multiples facilitate comparison while maintaining clarity.
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
Stacked area charts show cumulative totals, not individual trends.
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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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: Small multiples of line charts, one per region — Small multiples (trellis charts) allow comparison of multiple time series in a compact, consistent layout, making it easy to spot trends across regions.
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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