Snowflake Certification Practice Test

Which statement is true regarding reclustering a small table?

1. It significantly improves query performance.

2. It typically doesn't improve query performance significantly.

3. It is always necessary to recluster tables.

4. It is only relevant for large tables.

The correct answer is: It typically doesn't improve query performance significantly.

Reclustering a small table typically doesn't improve query performance significantly because small tables generally contain comparatively few rows, making the overhead of reclustering unnecessary. When queries are executed against small datasets, the benefits of clustering—like reducing the number of partitions to scan and improving data locality—are often minimal. In small tables, the performance gains from optimizing data layout may not outweigh the resources and time required to perform the reclustering. As a result, for small datasets, the natural efficiency of querying without complex clustering operations is usually sufficient, making reclustering less critical compared to larger tables where the impact of data organization is much more pronounced. Other options imply a degree of necessity or relevance that does not hold true for small tables; for instance, suggesting that reclustering is always necessary or only applicable to large tables discounts the situation where it simply might not yield meaningful improvements.