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Snowflake NAS-C01 Exam Syllabus Topics:

Snowflake SnowPro Specialty - Native Apps Sample Questions:

Question 1

Your team is building a Snowflake Native App that uses a UDF (User-Defined Function) for data enrichment. The UDF needs to access an external API key. Which of the following approaches are valid and secure methods for providing the API key to the UDF within the Native App framework?

A. Store the API key in a database table within the consumer's account and grant the UDF access to that table.
B. Use a secure parameter in the MANIFEST.yml and access it within the UDF.
C. Store the API key directly in the UDF's code.
D. Store the API key using Snowflake's Secret Management feature and grant the UDF access to the secret.
E. Pass the API key as a parameter to the UDF when it's called.

Question 2

A data science team within your organization is developing a Snowflake Native App that needs to access and process customer data stored in a Snowflake database. The app must only access data for customers residing in the 'USA' region. The team has created a custom role 'APP ROLE for the app to use. Which of the following is the MOST secure and efficient way to grant the app the necessary permissions to read the filtered data? Assume a secure view approach is preferred over direct table access.

A. Grant the 'APP_ROLE the 'SELECT privilege on the base customer data table and rely on row-level security policies defined on that table.
B. Grant the 'APP_ROLE the 'USAGE privilege on the database and schema containing the customer data table. Data filtering should still be handled by the app.
C. Grant the SAPP ROLE the 'OWNERSHIP' privilege on the base customer data table and implement data filtering logic within the app itself.
D. Create a secure view that filters customer data to include only customers in the 'USA' region and grant the SAPP ROLE the 'SELECT privilege on the secure view.
E. Create a standard view (non-secure) that filters customer data to include only customers in the 'USA' region and grant the 'APP_ROLE the 'SELECT' privilege on this view.

Question 3

You're building a Streamlit application within a Snowflake Native App that uses the Permissions API (hypothetical) to control access to sensitive dat a. Your security team has mandated that any changes to data access privileges must be audited. How can you effectively log all privilege grant and revoke operations performed via the Permissions API within your Streamlit application running inside Snowflake, assuming you are given the hypothetical 'PermissionsClient' and methods as below?

A. Leverage Snowflake's built-in 'QUERY _ HISTORY' view to track all SQL commands executed by the Streamlit application. Filter for 'GRANT and 'REVOKE statements to identify privilege changes. Replicate to external storage for retention.
B. Use Snowflake's native logging capabilities in the application's setup script, logging directly to the Snowflake event log. However, these logs may require a system administrator to interpret and extract.
C. Rely solely on the Permissions API's built-in audit trails, assuming it automatically logs all operations to a system table accessible only by Snowflake administrators.
D. Implement a custom logging function that captures the API calls and their parameters. Use a try-except block around each API call, logging the details to a separate audit table in Snowflake, and pushing logs to external SIEM tools.
E. Configure Snowflake's event tables for security to track privilege grants and revokes. Create a Streamlit function that fetches and displays these audit events within the application's admin panel. Push data into separate staging area.

Question 4

You are troubleshooting an issue where a Snowflake Native Application's Scala UDF, 'process_data' , is sporadically failing with an 'OutOfMemoryError'. The UDF processes large XML files. You need to identify the cause and implement a solution. Which strategies are most appropriate for diagnosing and resolving this issue within the constraints of a Snowflake Native Application?

A. Modify the 'process_data' UDF to stream the XML file instead of loading the entire file into memory at once. Use a streaming XML parser to process the data incrementally.
B. Break down the large XML files into smaller chunks before processing them with the UDF. This reduces the memory footprint of each individual UDF execution. Implement a system to orchestrate processing chunks.
C. Use a memory profiler to analyze the UDF's memory usage. Identify memory leaks or inefficient data structures that contribute to the 'OutOfMemoryErroN.
D. Implement caching mechanisms within the UDF to reuse previously processed XML data, reducing the need to load and parse the same data repeatedly.
E. Increase the warehouse size for the consumer's account. This provides more memory to the UDF execution environment.

Question 5

A provider is developing a Snowflake Native Application that uses a managed task to perform critical data transformations. The provider wants to ensure the managed task is only ever executed when the application is in a 'RUNNING' state. They have defined a secure view which returns a single row and a column named 'status' of type VARCHAR. The provider intends to use the 'EXECUTE MANAGED TASK' privilege in conjunction with a user-defined function (UDF) to control task execution. Which of the following approaches, utilizing a UDF and the 'EXECUTE MANAGED TASK' privilege, will correctly and securely prevent the managed task from running unless the application status is 'RUNNING'? Assume the UDF is created with the 'SECURE keyword.

A. create a UDF that executes if 'SELECT status FROM app_db.app_schema.app_status_view' does not return 'RUNNING'. Grant 'EXECUTE MANAGED TASK' on the managed task to the application role. Do not grant SELECT on the view.
B. Create a UDF that executes ' if 'SELECT status FROM app_db.app_schema.app_status_view' returns 'RUNNING'. Grant 'EXECUTE MANAGED TASK' on the managed task to the application role. Grant SELECT on the view.
C. Create a UDF that returns TRUE only if 'SELECT status FROM app_db.app_schema.app_status_view' returns 'RUNNING'. Then, in the managed task definition, use the WHEN clause with the UDF. Grant 'EXECUTE MANAGED TASK' on the managed task and 'SELECT on the to the application role.
D. Create a UDF that returns TRUE only if 'SELECT status FROM app_db.app_schema.app_status_view' returns 'RUNNING'. Then, in the managed task definition, use the WHEN clause with the UDF. Grant 'EXECUTE MANAGED TASK' on the managed task to the application role. Do not grant SELECT on the view.
E. Create a UDF that executes 'SYSTEM$TASK SUSPEND('app_db.app_schema.my_managed_task'Y if 'SELECT status FROM app_db.app_schema.app_status_view' does not return 'RUNNING', otherwise executes Grant 'EXECUTE MANAGED TASK' on the managed task to the application role. Grant 'SELECT on the view.

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