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Exam AI-200 Topic 1 Question 143 Discussion

Actual exam question for Microsoft's AI-200 exam
Question #: 143
Topic #: 1
You develop an AI application that stores telemetry documents in Azure Cosmos DB for NoSQL.
Each document contains 30 properties. Queries filter only on deviceId and timestamp.
Write operations consume more RUs than expected.
You need to reduce RU consumption for write operations while maintaining query performance.
What should you do?

Suggested Answer: A Vote an answer

Modify the indexing policy to include only deviceId and timestamp paths, and exclude all other paths. By default, Azure Cosmos DB indexes every property in a document, which drastically inflates the Request Units (RUs) consumed during write operations.
Reference:
https://www.datacamp.com/tutorial/azure-cosmos-db

by Haley at Sep 06, 2026, 02:50 PM

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