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

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Question 666

When should a multi-cluster virtual warehouse be used in Snowflake?

A.When queuing is delaying query execution on the warehouse
B.When there is significant disk spilling shown on the Query Profile
C.When dynamic vertical scaling is being used in the warehouse
D.When there are no concurrent queries running on the warehouse

Correct Answer: A

A multi-cluster virtual warehouse in Snowflake is designed to handle high concurrency and workload demands by allowing multiple clusters of compute resources to operate simultaneously. The correct scenario to use a multi-cluster virtual warehouse is:
A . When queuing is delaying query execution on the warehouse: Multi-cluster warehouses are ideal when the demand for compute resources exceeds the capacity of a single cluster, leading to query queuing. By enabling additional clusters, you can distribute the workload across multiple compute clusters, thereby reducing queuing and improving query performance.
This is especially useful in scenarios with fluctuating workloads or where it's critical to maintain low response times for a large number of concurrent queries.
Reference:
Snowflake Documentation: Multi-Cluster Warehouses at Snowflake Documentation

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Question 667

Masking policies are created at what level in Snowflake?

A.Table
B.Column
C.Schema
D.Database

Correct Answer: B

Masking policies in Snowflake are created and applied at the column level. These policies are used to obfuscate sensitive data by masking the values in a specific column. Masking policies can enforce data privacy and protection measures by dynamically masking the data based on the role of the user querying the data.
Reference:
Snowflake Documentation: Dynamic Data Masking

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Question 668

True or False: It is possible to query data from an Internal or named External stage without loading the data into Snowflake.

A.False
B.True

Correct Answer: B

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Question 669

In addition to performing all the standard steps to share data, which privilege must be granted on each database referenced by a secure view in order to be shared?

A.READ
B.REFERENCES
C.REFERENCEJJSAGE
D.USAGE

Correct Answer: D

In addition to performing all the standard steps to share data, the USAGE privilege must be granted on each database referenced by a secure view in order to be shared. When sharing a database or specific objects like secure views, the receiving account needs to have the USAGE privilege on the database and schema to access the shared data. This privilege enables the receiving account to access the database and its schemas but does not allow for any DML operations. It's a prerequisite for accessing any objects within the database.
For a secure view to be part of a share, not only does the view itself need to be shared, but the underlying database (and schema, if applicable) must also be accessible to the recipients. Granting USAGE privilege on the database ensures that the receiving account can access the database in a read-only mode to utilize the shared view.
References:
* Snowflake Documentation on Shares: Creating and Managing Shares

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Question 670

Which data types can be used in a Snowflake table that holds semi-structured data? (Select TWO).

A.ARRAY
B.BINARY
C.TEXT
D.VARIANT
E.VARCHAK

Correct Answer: A,D

Snowflake supports semi-structured data types that can store complex data structures within a single column.
TheVARIANTdata type can hold structured and semi-structured data formats such as JSON, Avro, ORC, Parquet, and XML. TheARRAYdata type is also used for semi-structured data and can store an ordered list of elements. These data types enable users to work with semi-structured data directly in Snowflake without needing to flatten the data into a relational schema first.
References: Snowflake Documentation on Semi-Structured Data Types

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