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Microsoft Certified: Azure Solutions Architect Expert · Microsoft
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Azure Cosmos DB is unique among Azure storage services in that it provides SLA-backed guarantees for latency, throughput, consistency, and availability — all defined in its comprehensive SLA. Specifically: Write latency SLA: Cosmos DB guarantees single-digit millisecond latency for both reads and writes at the 99th percentile, backed by its SLA. Throughput SLA: Cosmos DB provides guaranteed throughput through its provisioned Request Units (RU/s) model, and this throughput guarantee is part of the SLA.
The Given answer D is correct Tip: Whenever you see those words "mission critical application/Data" you can be sure 9/10 it is Azure Cosmo DB if it is part of solution proposed. Key Benefits of Azure Cosmos DB The guaranteed speed at any scale: Fast read and write latencies worldwide. Multi-region writes (Multi Master Writes)and ease of data distribution to any Azure region. Scale storage and throughput across any Azure region independently and elastically. Mission-critical ready: Azure Cosmos DB is backed by an extensive suite of SLAs, including industry-leading availability worldwide. The automatic data replication feature helps to distribute data across any Azure region efficiently. Data safety is ensured by Azure role-based access control.
Should not it be worded as "Database Solution" instead of "Storage solution" for the records of a mission critical application ? "Storage Solution" misleads one to think about storage tiers.