Exam CISA Topic 1 Question 248 Discussion

Actual exam question for ISACA's CISA exam
Question #: 248
Topic #: 1
What is the purpose of hashing a document?

Suggested Answer: A Vote an answer

by shery.aj89 at Aug 16, 2025, 12:59 PM

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shery.aj89
2025-08-16 12:59:48
Selected Answer: D
Hashing a document does not change the content or protect confidentiality; instead, it generates a fixed-length digest that acts like a digital fingerprint.

If even a single character in the document changes, the hash value will change drastically, alerting you to tampering or corruption.

❌ Why not the others?

A. Compress the size of the file → That’s the role of compression (e.g., ZIP), not hashing.

B. Prevent unauthorized disclosure → That’s encryption’s purpose, not hashing.

C. Classify the file for internal use → That’s a governance/labeling control, unrelated to hashing.

👉 Hashing = Integrity check, not confidentiality or compression.
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