COF-C02 EXAM OUTLINE - VCE COF-C02 FORMAT

COF-C02 Exam Outline - Vce COF-C02 Format

COF-C02 Exam Outline - Vce COF-C02 Format

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Tags: COF-C02 Exam Outline, Vce COF-C02 Format, Valid COF-C02 Exam Bootcamp, COF-C02 Review Guide, COF-C02 Test Topics Pdf

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Snowflake SnowPro Core Certification Exam Sample Questions (Q219-Q224):

NEW QUESTION # 219
Which function will provide the proxy information needed to protect Snowsight?

  • A. SYSTEMSALLONTLIST
  • B. SYSTEM$GET_PRIVATELINK
  • C. SYSTEMAUTHORIZE
  • D. SYSTEMADMIN_TAG

Answer: B


NEW QUESTION # 220
Which transformation is supported by a COPY INTO <table> command?

  • A. Filter using a where clause
  • B. Filter using a limit keyword
  • C. Cast using a SELECT statement
  • D. Order using an ORDER BY clause

Answer: C

Explanation:
The COPY INTO <table> command in Snowflake supports transformations such as casting using a SELECT statement. This allows for the transformation of data types as the data is being loaded into the table, which can be particularly useful when the data types in the source files do not match the data types in the target table


NEW QUESTION # 221
Users are responsible for data storage costs until what occurs?

  • A. Data expires from Fail-safe
  • B. Data expires from Time Travel
  • C. Data is truncated from a table
  • D. Data is deleted from a table

Answer: A

Explanation:
Users are responsible for data storage costs in Snowflake until the data expires from the Fail-safe period. Fail-safe is the final stage in the data lifecycle, following Time Travel, and provides additional protection against accidental data loss. Once data exits the Fail-safe state, users are no longer billed for its storage


NEW QUESTION # 222
A query containing a WHERE clause is running longer than expected. The Query Profile shows that all micro-partitions being scanned How should this query be optimized?

  • A. Create a view on the table.
  • B. Add a limit clause to the query.
  • C. Add a Dynamic Data Masking policy to the table.
  • D. Add a clustering key to the table

Answer: D

Explanation:
When a query containing a WHERE clause is running longer than expected, and the Query Profile shows that all micro-partitions are being scanned, the query can be optimized by adding a clustering key to the table.
* Understanding Micro-Partitioning in Snowflake:
* Snowflake automatically partitions tables into micro-partitions for efficient storage and query performance.
* Each micro-partition contains metadata about the range of values it holds, which helps in pruning
* irrelevant partitions during query execution.
* Role of Clustering Keys:
* A clustering key defines how data in a table is organized within micro-partitions.
* By specifying a clustering key, you can control the physical layout of data, ensuring that related rows are stored together.
* This organization improves query performance by reducing the number of micro-partitions that need to be scanned.
* Optimizing Queries with Clustering Keys:
* Adding a clustering key based on columns frequently used in WHERE clauses helps Snowflake quickly locate and scan relevant micro-partitions.
* This minimizes the amount of data scanned and reduces query execution time.
* Example:
ALTER TABLE my_table CLUSTER BY (column1, column2);
* This command adds a clustering key tomy_tableusingcolumn1andcolumn2.
* Future queries that filter on these columns will benefit from improved performance.
* Benefits:
* Reduced query execution time: Fewer micro-partitions need to be scanned.
* Improved resource utilization: More efficient data retrieval leads to lower compute costs.
References:
* Snowflake Documentation: Clustering Keys
* Snowflake Documentation: Query Profile


NEW QUESTION # 223
Which of the following is a valid source for an external stage when the Snowflake account is located on Microsoft Azure?

  • A. An HTTPS server with WebDAV
  • B. A Google Cloud storage bucket
  • C. A Windows server file share on Azure
  • D. An FTP server with TLS encryption

Answer: B


NEW QUESTION # 224
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