AI-200 Data Management Services And Vector Search Practice Question
You are designing an application that stores vector embeddings in Azure Cosmos DB for NoSQL. You want to ensure that vectors are stored securely and that all data at rest is encrypted using customer-managed keys (CMK). How is this achieved in Cosmos DB?
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
✓
Configure customer-managed keys (CMK) at the Azure Cosmos DB account level referencing Azure Key Vault
Customer-managed keys in Azure Cosmos DB are configured at the Azure Cosmos DB account level using Azure Key Vault integration.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Enable encryption inside the vector embedding policy JSON definition
Why it's wrong here
Encryption settings are managed at the account level, not inside the vector embedding policy.
- ✗
Encrypt each individual vector array in client application code before inserting
Why it's wrong here
Client-side encryption of vector arrays prevents Cosmos DB from performing server-side vector distance calculations.
- ✗
Store vectors in Azure Blob Storage with a CMK policy
Why it's wrong here
The data store is Cosmos DB, not Blob Storage.
- ✓
Configure customer-managed keys (CMK) at the Azure Cosmos DB account level referencing Azure Key Vault
Why this is correct
CMK encryption is configured at the Cosmos DB account level with Azure Key Vault.
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JA
Written and reviewed by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
Last reviewed August 2026 · checked against the official Microsoft exam blueprint
This AI-200 practice question is part of Courseiva's free Microsoft 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 AI-200 exam.