DP-203 Question #226: Real Exam Question with Answer & Explanation

Question

An in-house team is developing a new application. The design document specifies that data should be represented using nodes and relationships in graph structures. Individual data elements are relatively small. You need to recommend an appropriate data storage solution. Which solution should you recommend?

Options

• AAzure Storage Blobs
• BCosmos DB
• CAzure Data Lake Store
• DHBase in HDInsight

Explanation

Cosmos DB is the right choice because it natively supports a graph data model via the Gremlin API, making it purpose-built for storing nodes and relationships - exactly what the design document specifies. Azure Storage Blobs (A) is object storage for unstructured files like images and documents, with no concept of graph structures or relationships. Azure Data Lake Store (C) is designed for big-data analytics workloads with large files, not small, interconnected graph nodes. HBase in HDInsight (D) is a wide-column NoSQL store optimized for large-scale tabular data, not graph traversal.

Memory tip: Think "Cosmos = Connections" - Cosmos DB's multi-model API supports graphs (Gremlin), documents (Core SQL), key-value, and more, so whenever an exam question mentions nodes, edges, or graph relationships in Azure, Cosmos DB is almost always the answer.

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