Cognizant Snowflake Developer Interview Questions, Process, and Tips

The max cluster size in Snowflake is determined by the number of nodes in the cluster.

• Max cluster size is determined by the number of nodes in the cluster.

• Snowflake supports clusters with up to 128 nodes.

• Increasing the cluster size can improve performance for large-scale data processing.

Rank assigns unique numbers to each distinct value in a dataset. Dense rank assigns unique numbers to each distinct value in a dataset, but without any gaps.

• Rank assigns a unique number to each distinct value in a dataset, starting from 1.

• Dense rank assigns a unique number to each distinct value in a dataset, but without any gaps.

• If two values have the same rank, the next rank will be skipped in rank, but not in dense ...read more

Hash join is the fastest join.

• Hash join is faster than nested loop join and merge join.

• It is suitable for large tables with no indexes.

• It works by creating a hash table of the smaller table and then probing it with the larger table.

• Example: SELECT * FROM table1 JOIN table2 ON table1.id = table2.id OPTION (HASH JOIN);