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Snowflake NAS-C01 Exam Syllabus Topics:

Snowflake SnowPro Specialty - Native Apps Sample Questions:

1. You are developing a Snowflake Native Application that processes customer dat a. To comply with data residency requirements, you need to ensure the application processes data within the customer's Snowflake account. The application logic resides in a Snowpark Python stored procedure. During development, you test this procedure using the 'CALL' command. However, after installing the application in a customer's account, the procedure fails with a 'privilege insufficient' error. What are the MOST likely reasons for this and how can you rectify them within the package definition?

A) The application role lacks sufficient privileges on the data sources within the customer's account. Grant the appropriate privileges (e.g., 'SELECT , 'INSERT) on the required tables/views to the application role in the setup script using 'GRANT SELECT ON TABLE TO APPLICATION ROLE
B) The stored procedure is missing the EXECUTE MANAGED ACCOUNT privilege. Add 'GRANT EXECUTE MANAGED ACCOUNT ON PROCEDURE TO APPLICATION ROLE to the setup script.
C) The application manifest is missing the 'external_network_accesS property set to 'true'. Add this to the manifest and use network rules if the application requires access to external resources.
D) The procedure owner is not the application. This can be resolved by transferring ownership to the application role using 'ALTER PROCEDURE (...) OWNER TO APPLICATION ROLE in the setup script.
E) The stored procedure requires the 'IMPORTED PRIVILEGES on the database. Grant this using 'GRANT IMPORTED PRIVILEGES ON DATABASE TO APPLICATION ROLE in the setup script.

2. 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) Include a comment in the setup script indicating the required Snowflake Edition. Rely on the consumer to manually verify their edition before installation.
B) The Snowflake Marketplace automatically checks for edition compatibility before allowing installation of a Native Application. No explicit checks are needed in the setup script.
C) 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.
D) 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.
E) 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.

3. You are developing a Snowflake Native Application and want to implement comprehensive cost monitoring for your application's resource consumption within a consumer's Snowflake account. Which of the following approaches provide the MOST effective and granular cost visibility for both you (as the provider) and your consumers?

A) Implement custom logging within your application to track resource usage (e.g., CPU time, data scanned) for each function or query. Aggregate and analyze these logs to generate cost reports for consumers.
B) Combine Snowflake's query history (accessed via the ACCOUNT_USAGE schema) with custom tagging of resources and queries within your application. This allows you to attribute resource consumption to specific application features and provide detailed cost breakdowns for consumers.
C) Rely solely on Snowflake's global account-level cost dashboards and resource monitors to track overall Snowflake usage, including the resources consumed by your application. Analyze these dashboards manually to identify potential cost optimization opportunities.
D) Leverage Snowflake's Resource Monitor feature to set budget limits for the entire consumer account and receive alerts when these limits are exceeded. This provides a general overview of spending but lacks application-specific granularity.
E) Utilize Snowflake's query history and function within your application to capture query execution statistics. Create views or tables to summarize resource consumption metrics for specific application components.

4. You are developing a complex Snowflake Native Application with multiple Python modules and dependencies. You've carefully crafted your 'environment.yml' file, but during the installation process in a consumer account, you encounter intermittent errors related to package conflicts. These errors are difficult to reproduce consistently. What is the MOST effective strategy, encompassing both design and troubleshooting, to mitigate these dependency resolution issues and ensure a reliable installation experience for your users? Select TWO options.

A) Use a broad range of package versions in your 'environment.ymr file to allow for flexibility during dependency resolution, reducing the likelihood of conflicts.
B) Vendor all third-party Python dependencies directly into your application package (i.e., include the package code directly instead of relying on Conda installation). This creates a self-contained application with no external dependencies.
C) Examine the Snowflake logs ('SYSTEM$GET_PREDECESSORS' and 'SYSTEM$GET_DEPENDENTS') for any other applications installed in the consumer account that might be conflicting with your application's dependencies.
D) Implement robust error handling in your Python modules to catch potential 'ImportError' exceptions and provide informative error messages to the user, even if the underlying cause is a dependency conflict.
E) Pin all dependencies to specific versions in your 'environment.yml' file, including transitive dependencies, to create a deterministic and reproducible environment.

5. You've installed a Snowflake Native Application that provides advanced data analytics. The application requires a consumer-defined function (UDF), 'MASK SENSITIVE DATA, to be created in their account and used by the application. The application's setup script includes logic to check for the UDF's existence, but you want to ensure the application gracefully handles the case where the consumer has not yet created the UDF. Which of the following strategies can you implement to improve the application's resilience and provide a better user experience in this scenario? Select all that apply.

A) Require the consumer to create the UDF before installing the application. The application setup script should fail if the UDF is not found, preventing installation.
B) Dynamically generate the application code using a stored procedure, only including the parts of the code that rely on if the function exists. Use 'SYSTEM$GET PRIVILEGES()' to check existence.
C) Implement error handling within the application's code to catch the 'SQL compilation error: UDF does not exists exception. Provide a user-friendly error message and instructions on how to create the UDF.
D) In the application's setup script, create a placeholder UDF with the same name and signature as 'MASK SENSITIVE DATA' that returns 'NULL'. The application logic can then handle 'NULL' values appropriately until the consumer provides the actual UDF.
E) Within the application's SQL code, use the 'TRY FUNCTION' function to call 'MASK SENSITIVE DATA'. If the UDF does not exist, 'TRY FUNCTION' will return 'NULL' instead of raising an error.

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