The answer is to automatically purge records using a data management tool that overwrites data after the retention period. This is correct because overwriting—applying patterns like those in DoD 5220.22-M or NIST SP 800-88—replaces the bits on storage media, rendering the original transaction data unrecoverable and satisfying both regulatory retention mandates and secure destruction requirements. On the CISSP exam, this tests your understanding of the data security lifecycle, specifically the sanitization phase within Domain 2 (Asset Security). A common trap is confusing logical deletion (which leaves recoverable traces) with physical destruction; the exam expects you to recognize that overwriting is the preferred automated method for policy-driven, scheduled purging in a financial environment. Memory tip: think “Overwrite, not delete—bits must be beat.”
CISSP Asset Security Practice Question
This CISSP practice question tests your understanding of asset security. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. 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 institution is implementing a data retention policy to comply with regulatory requirements. The policy must ensure that transaction records are retained for 7 years and then securely destroyed. Which of the following is the BEST approach to implement this policy?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "best"
Why it matters: Signals that multiple options may be partially correct. Choose the option that most directly solves the exact problem described, not the one that sounds most complete.
Encrypt all records and destroy the encryption keys after 7 years
Why wrong: Encrypting and key destruction can be effective, but it does not ensure complete destruction if keys are backed up or if data is still recoverable through other means.
B
Automatically purge records using a data management tool that overwrites data after the retention period
Automated purging ensures consistent and timely destruction, reducing human error and ensuring compliance.
C
Move records to a separate archive and delete the directory pointers
Why wrong: Deleting pointers does not remove the underlying data, which may still be recoverable.
D
Manually review and delete records after 7 years
Why wrong: Manual review is error-prone and inefficient for large volumes.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Automatically purge records using a data management tool that overwrites data after the retention period
Option B is correct because automated purging using a data management tool that overwrites data ensures that the records are securely destroyed at the end of the retention period, meeting both regulatory compliance and data sanitization requirements. Overwriting (e.g., using DoD 5220.22-M or NIST SP 800-88 standards) prevents data recovery by replacing the storage media's bits with patterns, making it a reliable method for secure destruction in a financial institution's automated environment.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✗
Encrypt all records and destroy the encryption keys after 7 years
Why it's wrong here
Encrypting and key destruction can be effective, but it does not ensure complete destruction if keys are backed up or if data is still recoverable through other means.
✓
Automatically purge records using a data management tool that overwrites data after the retention period
Why this is correct
Automated purging ensures consistent and timely destruction, reducing human error and ensuring compliance.
Clue confirmation
The clue word "best" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✗
Move records to a separate archive and delete the directory pointers
Why it's wrong here
Deleting pointers does not remove the underlying data, which may still be recoverable.
✗
Manually review and delete records after 7 years
Why it's wrong here
Manual review is error-prone and inefficient for large volumes.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse 'cryptographic erasure' (Option A) with secure destruction, but the CISSP exam emphasizes that destroying encryption keys does not physically destroy the data and is not considered a secure destruction method for regulatory compliance unless combined with other controls.
Detailed technical explanation
How to think about this question
Secure data destruction methods like overwriting (also called clearing or purging) are defined in NIST SP 800-88 Rev. 1, which specifies that overwriting the entire storage device with a pattern (e.g., all zeros, all ones, or a random pattern) multiple times renders data unrecoverable even with advanced forensic techniques. In contrast, cryptographic erasure (Option A) is considered a form of 'media sanitization' only if the encryption keys are destroyed and the ciphertext is rendered indecipherable, but it is not recommended for high-assurance environments because of the risk of future cryptanalysis or key recovery. Real-world scenarios, such as financial audits, require verifiable proof of destruction, which automated overwriting tools can log, whereas manual deletion or pointer removal cannot provide such assurance.
KKey Concepts to Remember
Read the scenario before looking for a memorised answer.
Find the constraint that changes the correct option.
Eliminate answers that are true in general but not in this case.
TExam Day Tips
→Watch for words such as best, first, most likely and least administrative effort.
→Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A developer is choosing between AES-256 (symmetric) and RSA-2048 (asymmetric) for encrypting a large file that will be sent to a partner. Symmetric encryption is fast but requires key exchange; asymmetric is slower but solves the key distribution problem. A hybrid approach — encrypt the file with AES, encrypt the AES key with RSA — is standard. Questions like this test whether you understand when each approach applies.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this CISSP question in full detail.
Asset Security — This question tests Asset Security — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Automatically purge records using a data management tool that overwrites data after the retention period — Option B is correct because automated purging using a data management tool that overwrites data ensures that the records are securely destroyed at the end of the retention period, meeting both regulatory compliance and data sanitization requirements. Overwriting (e.g., using DoD 5220.22-M or NIST SP 800-88 standards) prevents data recovery by replacing the storage media's bits with patterns, making it a reliable method for secure destruction in a financial institution's automated environment.
What should I do if I get this CISSP question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Are there clue words in this question I should notice?
Yes — watch for: "best". Signals that multiple options may be partially correct. Choose the option that most directly solves the exact problem described, not the one that sounds most complete.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
About these practice questions
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These questions test the same concept from different angles. Work through them to make sure you can recognise it however the exam phrases it.
Variation 1. A financial institution must retain customer transaction records for 7 years. After that, what is the most appropriate action?
medium
A.Degauss and physically destroy
✓ B.Securely delete using overwriting
C.Transfer to a third-party storage vendor
D.Archive to tape for additional redundancy
Why B: After the 7-year retention period, the most appropriate action is to securely delete the records using overwriting. This ensures that the data is irrecoverable while maintaining compliance with data disposal policies. Overwriting with multiple passes (e.g., using the Gutmann method or DoD 5220.22-M standard) prevents data remanence, which is critical for financial records.
Last reviewed: Jun 11, 2026
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This CISSP practice question is part of Courseiva's free ISC2 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 CISSP exam.
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