Which task is performed in the Cloud Services layer in the Snowflake architecture?

Question

Options

• AOptimizing SQL queries
• BScaling warehouses up and down
• CManaging user roles
• DOptimizing network traffic

• A
  89% (33)
• B
  3% (1)
• C
  5% (2)
• D
  3% (1)

Explanation

Snowflake's architecture consists of three layers: Storage, Query Processing (Virtual Warehouses), and Cloud Services. The Cloud Services layer is the 'brain' that coordinates all activity across the platform. Option A is correct because SQL query optimization - including query parsing, semantic analysis, execution plan generation, and optimization - is handled entirely within the Cloud Services layer before any compute is dispatched to a virtual warehouse. This is why simple metadata-only queries can return results without spinning up a warehouse at all. Option B (scaling warehouses up/down) is an operation performed on the Query Processing layer. Option C (managing user roles) is an access control function also in Cloud Services, but query optimization is the most textbook-correct answer for this layer. Option D (network traffic optimization) is an infrastructure concern outside Snowflake's logical architecture layers.

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