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Snowflake NAS-C01 Exam Syllabus Topics:

Snowflake SnowPro Specialty - Native Apps Sample Questions:

1. You're developing a Snowflake Native App that includes a function, , which retrieves sensitive customer dat a. You want to ensure that this data is only accessible by authorized roles within the consumer's account, even after the application is installed. Which of the following strategies are appropriate for securing the application's data and function access? (Choose two)

A) Grant the 'EXECUTE privilege on the function to specific, consumer-defined roles within the consumer's account via the provider's setup script.
B) Grant the 'EXECUTE privilege on the function to the 'application role'.
C) Use a secure UDF to encapsulate the data retrieval logic, preventing direct access to the underlying tables.
D) Rely solely on the consumer's account administrator to manage access to the function and data after installation.
E) Implement a masking policy on the underlying customer data table that restricts access based on the current role.

2. Your team is developing a Snowflake Native App that requires access to network resources outside of Snowflake. After configuring an external access integration, you encounter an error indicating that the application cannot access the specified endpoint, even though the integration appears to be correctly configured. Assuming all network policies are in place and the external access integration is correctly defined, what is the MOST likely cause of this issue and how can it be resolved?

A) The external function or procedure attempting to use the integration has not been granted the REFERENCE USAGE privilege on the integration. Use 'GRANT REFERENCE USAGE ON INTEGRATION TO PROCEDURE ;
B) The URL specified in the external access integration is incorrect or contains a typo. Verify the URL and ensure it matches the expected endpoint.
C) The application role used by the application lacks the ' IMPORTED PRIVILEGES privilege on the external access integration. Grant this privilege using 'GRANT IMPORTED PRIVILEGES ON INTEGRATION TO APPLICATION ROLE
D) The network policy attached to the external access integration is too restrictive and is blocking access to the required endpoint. Review and update the network policy to allow access to the endpoint.
E) The application needs to be explicitly granted the USAGE privilege on the external access integration. Use 'GRANT USAGE ON INTEGRATION TO APPLICATION ROLE

3. A Native Application deployed on Snowflake uses a warehouse 'APP WH'. You want to monitor the warehouse usage costs specifically attributed to this application. Which of the following approaches provides the MOST granular and accurate way to track these costs?

A) Tag all queries originating from the application with a specific tag and then filter the 'QUERY_HISTORY view based on this tag and the warehouse name.
B) Examine the 'WAREHOUSE METERING HISTORY view in the 'SNOWFLAKE database without any filtering.
C) Rely on the total credits consumed by the account, as the application's usage is insignificant.
D) Use the view and filter by 'USER_NAME associated with the application role.
E) Create a separate warehouse solely for the application and then examine the 'WAREHOUSE METERING HISTORY view.

4. A Snowflake Native Application provider has encountered performance issues with a Scala-based UDF, 'aggregate data' , used within their application. Consumers report slow execution times when processing large datasets. The provider has identified that the UDF involves complex calculations and data transformations. Which optimization techniques can be applied to improve the performance of the 'aggregate_data' UDF within the constraints of the Snowflake Native Application environment?

A) Optimize the UDF's data structures and algorithms to reduce memory usage and improve processing efficiency. Consider using techniques such as caching frequently accessed data within the UDF.
B) Utilize Snowflake's vectorized UDF feature (if supported for Scala UDFs) to process data in batches, reducing the overhead of calling the UDF for each individual row.
C) Leverage Scala's parallel collections (e.g., 'par') to distribute the workload across multiple cores during data processing. Ensure that the UDF is designed to be thread-safe.
D) Replace the Scala UDF with a Snowflake stored procedure written in SQL. Stored procedures generally offer better performance for data-intensive operations.
E) Move the entire UDF logic to an external cloud function (e.g., AWS Lambda, Azure Function) and invoke it from Snowflake using a remote service. This offloads the computation to a more powerful environment.

5. You are developing the setup script for a Snowflake Native Application. The application requires a specific Snowflake Edition (e.g., Enterprise) to function correctly due to certain feature dependencies. How can you ensure that the installation fails gracefully and provides a clear error message if the consumer's account does NOT meet the required edition?

A) Attempt to create objects that are specific to the required Snowflake Edition within the setup script. If the creation fails due to edition limitations, the installation will automatically fail.
B) Use a configuration file included in the application package to specify the required Snowflake Edition. The setup script reads this file and displays an error message if the edition is not compatible.
C) Include a comment in the setup script indicating the required Snowflake Edition. Rely on the consumer to manually verify their edition before installation.
D) Use the 'SYSTEM$GET SNOWFLAKE EDITION()' function within the setup script and raise an exception using 'RAISE' if the edition is not compatible. Provide a descriptive error message.
E) The Snowflake Marketplace automatically checks for edition compatibility before allowing installation of a Native Application. No explicit checks are needed in the setup script.

Solutions: