- A
Data encryption
Why wrong: Encryption protects data at rest or in transit but doesn't restrict visibility by role.
- B
Row-level security
Row-level security filters data based on user attributes.
- C
Single version of truth
Why wrong: Single version of truth ensures consistency but not access control.
- D
Data masking
Why wrong: Data masking hides sensitive data but doesn't filter rows.
Question 925 of 1,000
DA0-001 Reporting Insights Practice Question
This DA0-001 practice question tests your understanding of reporting insights. 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 on customer satisfaction scores. The analyst wants to ensure that regional managers can only see data for their own region. Which security measure should be applied?
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
✓
Row-level security
Row-level security restricts data visibility so that users see only the rows relevant to them, such as their region.
Key principle: Count usable hosts — not total addresses — and remember that the network and broadcast addresses are not available to hosts in standard IPv4 subnets.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Data encryption
Why it's wrong here
Encryption protects data at rest or in transit but doesn't restrict visibility by role.
- ✓
Row-level security
Why this is correct
Row-level security filters data based on user attributes.
Related concept
CIDR notation defines the prefix length.
- ✗
Single version of truth
Why it's wrong here
Single version of truth ensures consistency but not access control.
- ✗
Data masking
Why it's wrong here
Data masking hides sensitive data but doesn't filter rows.
Common exam traps
Common exam trap: usable hosts are not the same as total addresses
Subnetting questions often tempt you into counting all addresses. In normal IPv4 subnets, the network and broadcast addresses are not usable host addresses.
Detailed technical explanation
How to think about this question
Subnetting questions test whether you can identify the network, broadcast address, usable range, mask and correct subnet. Slow down enough to calculate the block size correctly.
KKey Concepts to Remember
- CIDR notation defines the prefix length.
- Block size helps identify subnet boundaries.
- Network and broadcast addresses are not usable hosts in normal IPv4 subnets.
- The required host count determines the smallest suitable subnet.
TExam Day Tips
- Write the block size before choosing the subnet.
- Check whether the question asks for hosts, subnets or a specific address range.
- Do not confuse /24, /25, /26 and /27 host counts.
Key takeaway
Count usable hosts — not total addresses — and remember that the network and broadcast addresses are not available to hosts in standard IPv4 subnets.
Real-world example
How this comes up in practice
A network engineer segments a warehouse floor into three subnets: 20 scanners, 5 printers, and 2 management hosts. Picking the wrong mask wastes addresses or leaves too few usable hosts. Exam questions test whether you can apply CIDR notation, calculate block size, and identify the correct usable-host range for a given prefix.
What to study next
Got this wrong? Here's your next step.
Review block sizes, usable host formulas (2^n − 2), and how to find network and broadcast addresses for /24 through /30. Then practise related DA0-001 subnetting questions on CIDR, address ranges, and subnet selection.
- →
Reporting Insights — study guide chapter
Learn the concepts, then practise the questions
- →
Reporting Insights practice questions
Targeted practice on this topic area only
- →
All DA0-001 questions
1,000 questions across all exam domains
- →
CompTIA Data+ DA0-001 study guide
Full concept coverage aligned to exam objectives
- →
DA0-001 practice test guide
How to use practice tests most effectively before exam day
Related practice questions
Related DA0-001 practice-question pages
Use these pages to review the topic behind this question. This is how one missed question becomes focused revision.
Data Concepts and Environments practice questions
Practise DA0-001 questions linked to Data Concepts and Environments.
Analysing Data practice questions
Practise DA0-001 questions linked to Analysing Data.
Visualising Data practice questions
Practise DA0-001 questions linked to Visualising Data.
Reporting Insights practice questions
Practise DA0-001 questions linked to Reporting Insights.
Mining Data practice questions
Practise DA0-001 questions linked to Mining Data.
Comparing and Contrasting Data Concepts practice questions
Practise DA0-001 questions linked to Comparing and Contrasting Data Concepts.
Mining and Acquiring Data practice questions
Practise DA0-001 questions linked to Mining and Acquiring Data.
Analyzing and Modeling Data practice questions
Practise DA0-001 questions linked to Analyzing and Modeling Data.
Visualizing Data practice questions
Practise DA0-001 questions linked to Visualizing Data.
Communicating Data Insights practice questions
Practise DA0-001 questions linked to Communicating Data Insights.
CompTIA A+ hardware practice questions
Practise DA0-001 questions linked to CompTIA A+ hardware.
CompTIA A+ mobile devices practice questions
Practise DA0-001 questions linked to CompTIA A+ mobile devices.
Practice this exam
Start a free DA0-001 practice session
Short sessions build daily habit. Longer sessions build exam-day stamina. Try a timed session to simulate real conditions.
FAQ
Questions learners often ask
What does this DA0-001 question test?
Reporting Insights — This question tests Reporting Insights — CIDR notation defines the prefix length..
What is the correct answer to this question?
The correct answer is: Row-level security — Row-level security restricts data visibility so that users see only the rows relevant to them, such as their region.
What should I do if I get this DA0-001 question wrong?
Review block sizes, usable host formulas (2^n − 2), and how to find network and broadcast addresses for /24 through /30. Then practise related DA0-001 subnetting questions on CIDR, address ranges, and subnet selection.
What is the key concept behind this question?
CIDR notation defines the prefix length.
About these practice questions
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
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.
Question Discussion
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
Sign in to join the discussion.