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Snowflake Certification
COF-C02 Exam
Snowflake.COF-C02.v2025-08-26.q885 Dumps

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Question 871

What is the default File Format used in the COPY command if one is not specified?

A.CSV
B.JSON
C.Parquet
D.XML

Correct Answer: A

The default file format for the COPY command in Snowflake, when not specified, is CSV (Comma-Separated Values). This format is widely used for data exchange because it is simple, easy to read, and supported by many data analysis tools.

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Question 872

How often are encryption keys automatically rotated by Snowflake?

A.30 Days
B.60 Days
C.90 Days
D.365 Days

Correct Answer: A

Snowflake automatically rotates encryption keys when they are more than 30 days old. Active keys are retired, and new keys are created. This process is part of Snowflake's comprehensive security measures to ensure data protection and is managed entirely by the Snowflake service without requiring user intervention.
References:
* Understanding Encryption Key Management in Snowflake

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Question 873

Which use case does the search optimization service support?

A.Conjunctions (AND) of multiple equality predicates
B.Disjuncts (OR) in join predicates
C.Join predicates on VARIANT columns
D.UKE/ILIKE/RLIKE join predicates

Correct Answer: A

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Question 874

Which types of subqueries does Snowflake support? (Select TWO).

A.Uncorrelated scalar subqueries in WHERE clauses
B.Uncorrelated scalar subqueries in any place that a value expression can be used
C.EXISTS, ANY / ALL, and IN subqueries in WHERE clauses: these subqueries can be uncorrelated only
D.EXISTS, ANY / ALL, and IN subqueries in where clauses: these subqueries can be correlated only
E.EXISTS, ANY /ALL, and IN subqueries in WHERE clauses: these subqueries can be correlated or uncorrelated

Correct Answer: B,E

Snowflake supports a variety of subquery types, including both correlated and uncorrelated subqueries. The correct answers are B and E, which highlight Snowflake's flexibility in handling subqueries within SQL queries.
* Uncorrelated Scalar Subqueries: These are subqueries that can execute independently of the outer query. They return a single value and can be used anywhere a value expression is allowed, offering great flexibility in SQL queries.
* EXISTS, ANY/ALL, and IN Subqueries: These subqueries are used in WHERE clauses to filter the results of the main query based on the presence or absence of matching rows in a subquery. Snowflake supports both correlated and uncorrelated versions of these subqueries, providing powerful tools for complex data analysis scenarios.
* Examples and Usage:
* Uncorrelated Scalar Subquery:
SELECT * FROM employees WHERE salary > (SELECT AVG(salary) FROM employees);
* Correlated EXISTS Subquery:
SELECT * FROM orders o WHERE EXISTS (SELECT 1 FROM customer c WHERE c.id = o.customer_id AND c.region = 'North America'); Reference: For comprehensive details on the types of subqueries supported by Snowflake and examples of their usage, consult the Snowflake documentation on subqueries: https://docs.snowflake.com/en/sql-reference
/constructs/subqueries.html

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Question 875

What is the MINIMUM Snowflake edition that must be used in order to see the ACCESS_HISTORY view?

A.Standard
B.Enterprise
C.Business Critical
D.Virtual Private Snowflake (VPS)

Correct Answer: B

The ACCESS_HISTORY view in Snowflake provides detailed information about queries executed in the account, including metadata such as the time of execution, the user, and the SQL text of the queries. This view is available in the Snowflake Enterprise edition and higher editions. The Standard edition does not include this feature.
References:
* Snowflake Documentation: Access History
* Snowflake Editions: Snowflake Pricing

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