Snowflake Certification Practice Test

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What is the largest size of a micro-partition?

8 MB uncompressed
8 MB compressed
16 MB compressed
32 MB compressed

The correct answer is: 16 MB compressed

The largest size of a micro-partition in Snowflake is 16 MB when compressed. Micro-partitions are a fundamental component of Snowflake’s architecture, designed to efficiently manage storage and optimize performance. Each micro-partition contains a portion of the table data and is organized in a columnar format, which allows for efficient querying and storage. When data is inserted into Snowflake, it is stored in micro-partitions. While the maximum size is noted as 16 MB for compressed data, it is important to recognize that compression plays a significant role in the effective storage of data, allowing more information to fit within the designated partition size. Micro-partitions are automatically managed by Snowflake, meaning that they are created, merged, and deleted as necessary to optimize storage costs and query performance dynamically. This design also enables Snowflake to maintain high performance even with increasing data volumes. The alternatives presented regarding sizes like 8 MB uncompressed or 8 MB compressed do not reflect the maximum capacity. Meanwhile, the mention of 32 MB compressed exceeds Snowflake's defined limit for individual micro-partitions. Thus, 16 MB compressed accurately represents the architecture's constraints and capabilities.