The answer is Azure Key Vault Premium tier or Azure Managed HSM, as both provide FIPS 140-2 Level 3 validated hardware security modules for HSM-backed key storage in Azure. This is correct because the Standard tier of Key Vault uses software-backed keys, which do not meet strict compliance requirements that mandate dedicated, tamper-resistant hardware. On the AZ-900 exam, this question tests your understanding of how Azure differentiates between software-backed and HSM-backed key storage options, often presenting a trap where candidates mistakenly choose the Standard tier. A common memory tip is to associate the word “Premium” or “Managed” with physical hardware isolation—think “Premium = Physical HSM.” Remember, if a compliance requirement demands dedicated HSM hardware, you must choose either the Premium tier of Key Vault or the fully managed, single-tenant Managed HSM service.
AZ-900 Describe Azure architecture and services Practice Question
This AZ-900 practice question tests your understanding of describe azure architecture and services. 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 company wants to store sensitive encryption keys in a hardware security module (HSM) to meet compliance requirements. Which Azure service provides HSM-backed key storage?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Azure Key Vault Premium tier or Managed HSM
Azure Key Vault Premium tier and Azure Managed HSM both provide FIPS 140-2 Level 3 validated hardware security modules (HSMs) for storing sensitive encryption keys. The Standard tier of Key Vault uses software-backed keys and does not meet compliance requirements that mandate dedicated HSM hardware. Managed HSM offers single-tenant, fully managed HSM appliances with higher throughput and key isolation, making it the correct choice for HSM-backed key storage.
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.
✗
Azure Key Vault Standard tier
Why it's wrong here
Key Vault Standard tier protects keys with software — HSM backing requires the Premium tier or Managed HSM.
✓
Azure Key Vault Premium tier or Managed HSM
Why this is correct
Key Vault Premium uses HSMs for key protection; Managed HSM provides dedicated HSM instances for the highest compliance requirements.
Related concept
Read the scenario before looking for a memorised answer.
✗
Azure Storage with encryption at rest
Why it's wrong here
Storage encryption at rest uses platform-managed keys — not customer-managed keys in HSMs.
✗
Azure Active Directory
Why it's wrong here
Azure AD manages identities — it doesn't provide HSM-backed key storage.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often assume the Standard tier of Key Vault uses HSMs because it is a 'key vault,' but only the Premium tier and Managed HSM provide dedicated HSM hardware for compliance requirements.
Detailed technical explanation
How to think about this question
Azure Managed HSM is a single-tenant FIPS 140-2 Level 3 validated HSM service that allows you to manage your own HSM instances, providing full control over key lifecycle and access policies. It supports the same key types as Key Vault (RSA, EC, AES) but with dedicated HSM partitions and higher throughput (up to 10,000 operations per second). Under the hood, each Managed HSM pool consists of three HSM partitions across three availability zones, ensuring high availability and disaster recovery.
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 media company stores terabytes of video archives that are accessed once a year for audit purposes. Moving these objects to a cold storage tier (Azure Archive, S3 Glacier, or Google Nearline) costs a fraction of hot storage. Questions like this test whether you understand storage tiers, access frequency tradeoffs, and retrieval latency requirements.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this AZ-900 question in full detail.
Describe Azure architecture and services — This question tests Describe Azure architecture and services — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Azure Key Vault Premium tier or Managed HSM — Azure Key Vault Premium tier and Azure Managed HSM both provide FIPS 140-2 Level 3 validated hardware security modules (HSMs) for storing sensitive encryption keys. The Standard tier of Key Vault uses software-backed keys and does not meet compliance requirements that mandate dedicated HSM hardware. Managed HSM offers single-tenant, fully managed HSM appliances with higher throughput and key isolation, making it the correct choice for HSM-backed key storage.
What should I do if I get this AZ-900 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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