DA0-002 Data Concepts and Environments Practice Question
A company requires real-time masking of credit card numbers for customer support agents while allowing full access for accountants. Which technique should be implemented?
⚠ Common exam trap
CompTIA often tests the misconception that encryption or tokenization can provide real-time, role-based masking, but these technologies either require decryption (exposing the full value) or introduce latency and storage overhead, making dynamic data masking the only correct choice for this use case.
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
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Dynamic data masking
Dynamic data masking (DDM) applies masking rules at query runtime based on user privileges, allowing accountants full access while customer support agents see only masked credit card numbers. Unlike static masking, DDM does not alter the underlying stored data, making it ideal for real-time, role-based obfuscation without duplicating or transforming the database.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Dynamic data masking
Why this is correct
Dynamic masking masks data on-the-fly based on user roles, perfect for this requirement.
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Tokenization
Why it's wrong here
Tokenization replaces sensitive data with tokens, but typically applies to all users.
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Static data masking
Why it's wrong here
Static masking creates a permanent copy with masked data, not real-time.
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Data encryption
Why it's wrong here
Encryption makes data unreadable without keys, but does not selectively show full or masked values.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This DA0-002 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 DA0-002 exam.