Snowflake SnowPro Core Practice Test - Questions Answers, Page 38

One of the characteristics of materialized views in Snowflake is that they allow multiple tables to be joined in the underlying query.This enables the pre-computation of complex queries involving joins, which can significantly improve the performance of subsequent queries that access the materialized view4.Reference:[COF-C02] SnowPro Core Certification Exam Study Guide

To start configuring Snowflake for Single Sign-On (SSO), theCREATE SECURITY INTEGRATIONcommand is used.This command sets up a security integration object in Snowflake, which is necessary for enabling SSO with external identity providers using SAML 2.01.

When theDROP MANAGED ACCOUNTcommand is executed in Snowflake, it removes the managed account, including all objects created within the account, and access to the account is immediately restricted2.

Snowflake external tables are read-only, which means data manipulation language (DML) operations like INSERT, RENAME, or ALTER cannot be performed on them.However, external tables can be used for query and join operations3.

For optimizing the performance of queries that run on a very large table, it is recommended to choose one high cardinality column as the clustering key.This helps to co-locate similar rows in the same micro-partitions, improving scan efficiency in queries by skipping data that does not match filtering predicates4.

To reduce data spilling in Snowflake, using a larger virtual warehouse is effective because it provides more memory and local disk space, which can accommodate larger data operations and minimize the need to spill data to disk or remote storage1.

Reference: [COF-C02] SnowPro Core Certification Exam Study Guide

TheRETURN_ERRORSvalue in theVALIDATION_MODEoption of the COPY command instructs Snowflake to validate the data files and return errors encountered across all specified files, including those that were partially loaded during an earlier load2.

Reference: [COF-C02] SnowPro Core Certification Exam Study Guide

The search optimization service improves the performance of point lookup queries on large tables by using selective filters to quickly return a small number of rows.It creates an optimized data structure that helps in pruning the micro-partitions that do not contain the queried values3.

Reference: [COF-C02] SnowPro Core Certification Exam Study Guide

Temporary tables do not consume any storage costs in Snowflake because they only exist for the duration of the session that created them and are automatically dropped when the session ends, thus incurring no long-term storage charges4.

Reference: [COF-C02] SnowPro Core Certification Exam Study Guide