VA-003 Compare and configure secrets engines Practice Question
This VA-003 practice question tests your understanding of compare and configure secrets engines. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. 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.
Refer to the exhibit. An operator issues a certificate using this intermediate CA. The resulting certificate uses SHA1 signature algorithm. The operator wants SHA256. What should they do?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Generate a new intermediate with signature_bits=256
Option A is correct because the signature algorithm used by an intermediate CA is determined by the `signature_bits` parameter set when the intermediate CA's certificate is generated. To issue end-entity certificates with SHA256, the intermediate CA itself must be created with `signature_bits=256`. Simply changing a role or issuer after the intermediate exists does not retroactively alter the CA's signing key algorithm.
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.
✓
Generate a new intermediate with signature_bits=256
Why this is correct
The intermediate must be recreated with the desired signature bits.
Related concept
Read the scenario before looking for a memorised answer.
✗
Set the issuer's signature_bits to 256 using vault write
Why it's wrong here
Issuer attributes are not modifiable after creation.
✗
Use a different issuer_name that already has SHA256
Why it's wrong here
Possible but not the direct fix; but the question expects creating a new intermediate.
✗
Change the role's signature_bits to 256
Why it's wrong here
Role does not control issuer signature algorithm.
Common exam traps
Common exam trap: answer the scenario, not the keyword
HashiCorp often tests the distinction between the CA's own signing algorithm (set at CA creation) and the role's signing algorithm (set per issuance), leading candidates to mistakenly think a role change can fix the CA's algorithm.
Detailed technical explanation
How to think about this question
In Vault's PKI secrets engine, the `signature_bits` parameter (e.g., 256 for SHA256) is baked into the intermediate CA's certificate at generation time via the `pki` mount's `intermediate/set-signed` endpoint. The intermediate CA's private key and signing algorithm are then fixed; any certificate it issues uses the CA's configured signature algorithm unless the role explicitly overrides it with a different `signature_bits` value. However, the role override only applies to the end-entity certificate's signature, not the CA's own algorithm — a common misunderstanding. Real-world scenarios often involve compliance requirements (e.g., FIPS 140-2) mandating SHA256, forcing re-issuance of the intermediate CA.
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 small business has 20 workstations on the 192.168.1.0/24 network and one public IP from its ISP. The router uses PAT (NAT overload) so all 20 devices share one public address using different source ports. NAT questions test whether you understand the four address terms and which direction each translation applies.
What to study next
Got this wrong? Here's your next step.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Compare and configure secrets engines — This question tests Compare and configure secrets engines — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Generate a new intermediate with signature_bits=256 — Option A is correct because the signature algorithm used by an intermediate CA is determined by the `signature_bits` parameter set when the intermediate CA's certificate is generated. To issue end-entity certificates with SHA256, the intermediate CA itself must be created with `signature_bits=256`. Simply changing a role or issuer after the intermediate exists does not retroactively alter the CA's signing key algorithm.
What should I do if I get this VA-003 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Question Discussion
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