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Snowflake NAS-C01 Exam Syllabus Topics:

Section	Weight	Objectives
Application Design & Creation	35%	- Security and access control - Manifest files and configuration - Native App Framework architecture - Application packages and objects - Setup scripts and application logic
Application Deployment & Distribution	25%	- Publishing to Snowflake Marketplace - Versioning and release management - Upgrades and lifecycle management - Listing types and monetization
Advanced Features & Management	20%	- Governance and compliance - Event logging and telemetry - Billing events and cost monitoring - Integration with Snowpark and external services
Application Installation & Testing	20%	- Debugging and troubleshooting - Installation procedures and dependencies - Testing strategies and validation - Provider and consumer workflows

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Snowflake SnowPro Specialty - Native Apps Sample Questions (Q206-Q211):

NEW QUESTION # 206
You are developing a Streamlit application within a Snowflake Native Application that needs to access a secured view named 'sensitive_data' in the application's container. This view exposes aggregated and anonymized dat a. What minimum set of privileges must be granted to the 'app_public' application role to allow users to query this view from the Streamlit application?

A. GRANT USAGE ON DATABASE .application TO APPLICATION ROLE app_public; GRANT SELECT ON VIEW .application.sensitive_data TO APPLICATION ROLE app_public;
B. GRANT SELECT ON VIEW .application.sensitive_data TO APPLICATION ROLE app_public;
C. GRANT USAGE ON SCHEMA application TO APPLICATION ROLE app_public; GRANT SELECT ON VIEW .application.sensitive_data TO APPLICATION ROLE app_public;
D. GRANT USAGE ON DATABASE TO APPLICATION ROLE app_public; GRANT SELECT ON VIEW .application.sensitive_data TO APPLICATION ROLE app_public;
E. GRANT USAGE ON SCHEMA application TO APPLICATION ROLE app_public; GRANT ALL PRIVILEGES ON VIEW application.sensitive_data TO APPLICATION ROLE app_public;

Answer: C

Explanation:
The correct answer is B. To access a view, you need 'SELECT privilege on the view itself and USAGE privilege on the schema containing the view. 'APPLICATION' schema is the automatically generated schema, and should be used. Option A is incorrect because the USAGE privilege should be granted on the schema, not the database. Option C is incorrect because the USAGE privilege is needed on the schema, not just the database. Option D is incorrect because granting ALL PRIVILEGES is generally not a best practice for security and not needed. Option E is incorrect because you must grant usage on the Schema.

NEW QUESTION # 207
You have created a Snowflake Native Application that includes a User-Defined Function (UDF) written in Python. The UDF processes JSON data and performs complex calculations. During testing in a consumer's account, you discover that the UDF is running slower than expected. What steps can you take to optimize the UDF's performance? (Select TWO)

A. Reduce the complexity of the UDF by simplifying the calculations and minimizing the amount of data processed.
B. Switch the UDF implementation from Python to SQL, as SQL UDFs are generally faster than Python UDFs.
C. Increase the warehouse size allocated to the consumer's account, as this directly impacts UDF execution speed.
D. Recompile the UDF with the latest version of the Snowflake runtime environment.
E. Leverage vectorization techniques within the Python UDF using libraries like NumPy to perform operations on entire arrays instead of individual elements.

Answer: A,E

Explanation:
Leveraging vectorization (B) allows you to process data in bulk, significantly improving performance. Reducing complexity (D) minimizes the processing overhead of the UDF. Switching to SQL (A) might not always be faster, especially if the logic is complex or requires Python-specific libraries. Increasing the warehouse size (C) affects the overall query performance in the consumers account, but can impact cost dramatically. There is no recompilation as a general optimization strategy (E).

NEW QUESTION # 208
An application provider, 'SecureData Solutions', wants to implement an in-app share within their Snowflake Native App. They intend to share a specific, filtered subset of a provider-owned table with consumers to enhance app functionality without exposing the entire dataset. Which of the following steps are REQUIRED to properly configure and utilize this in-app share?

A. Create a database role in the provider account, grant SELECT privilege on the base table to the role, then create a SHARE and add the role to the SHARE as a privileged principal.
B. Create a share in the provider account, grant usage on the database and schema containing the table to the share, and then grant SELECT privilege on the filtered view of the table directly to the share.
C. Create a secure view on the provider-owned table with the desired filters, create a database role in the provider account, grant SELECT privilege on the secure view to this database role, create a share, and grant usage to the role. Lastly, grant OWNERSHIP on the SHARE to the application role.
D. Create a secure view on the provider-owned table with the desired filters, create a share in the provider account, grant usage on the database and schema containing the secure view to the share, and then grant SELECT privilege on the secure view directly to the share. Lastly, grant OWNERSHIP on the SHARE to the application role.
E. Create a database role in the provider account, grant SELECT privilege on the filtered view of the table to this database role, and then create a share and grant usage to this role.

Answer: D

Explanation:
In-app sharing requires using secure views for filtering. A share is created, and usage rights on the database and schema containing the secure view must be granted to the share. Then, SELECT privilege on the secure view is granted to the share directly. Finally, OWNERSHIP on the SHARE is granted to the application role. Database Roles cannot be directly be granted to share, as shares need access to concrete securable objects, views or tables.

NEW QUESTION # 209
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. 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.
B. 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.
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.

Answer: C,E

Explanation:
Options B and C are the best strategies for handling the missing UDF gracefully. 'TRY_FUNCTION' allows the application to continue running even if the UDF is not present, while error handling provides a clear and informative message to the user. Option A is problematic because it introduces a UDF that is not the intended function, potentially leading to data inconsistencies. Option D creates a rigid dependency and a poor user experience. Option E adds unnecessary complexity.

NEW QUESTION # 210
A customer has installed your Snowflake Native Application, which utilizes a IJDF that performs complex calculations. The customer reports performance issues and sporadic errors. As the application provider, how can you BEST establish telemetry and observability to diagnose the problem, without compromising the customer's data security or privacy?

A. Instruct the customer to enable verbose logging in their Snowflake account and provide you with the log files for analysis.
B. Implement logging within the UDF to capture execution time, input parameters (anonymized), and error messages. Store this data in an Event Table within the application provider's account and expose aggregate statistics through a secure API endpoint for the consumer to monitor.
C. Create a shared view on the UDF execution logs in the customer's account, granting you read-only access to the relevant information.
D. Utilize Snowflake's Query History to track the IJDF's performance in the customer's account and provide recommendations based on the observed query patterns.
E. Request direct access to the customer's Snowflake account to inspect the IJDF execution logs and query performance metrics.

Answer: B

Explanation:
Option B provides a balanced approach to observability and security. By logging anonymized input parameters and execution time within the IJDF and storing the data in an Event Table in the application provider's account, you can analyze performance and identify errors without directly accessing the customer's sensitive data. Exposing aggregate statistics allows the customer to monitor the application's performance. The other options either compromise security or rely on the customer to provide data, which might not be feasible or secure.

NEW QUESTION # 211
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