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Snowflake NAS-C01 Exam Syllabus Topics:

Snowflake SnowPro Specialty - Native Apps Sample Questions:

1. You are developing a Snowflake Native App using Python that performs complex data transformations using UDFs and external functions. During consumer testing, you observe intermittent 'Remote service timed out' errors when calling the external function. The external function is hosted on AWS Lambd a. Which combination of the following actions would BEST address this issue, ensuring reliability without compromising security?

A) Implement retry logic in the Python code calling the external function with exponential backoff, and configure Snowflake to use a larger warehouse size to improve network bandwidth. Furthermore, check if AWS Lambda throttles the execution of requests.
B) Cache the results of the external function calls in a Snowflake table to reduce the number of calls to the external service, and implement robust error handling and logging in both the Snowflake UDF and the Lambda function. Always return a value, even in case of error.
C) Increase the timeout setting for the external function in Snowflake, optimize the Lambda function code for faster execution, and monitor Lambda function metrics (e.g., duration, errors) using CloudWatch. Also, increase the memory allocation for the AWS Lambda function.
D) Implement queue-based processing for external function calls using Snowflake streams and tasks, leverage a message queue service (e.g., SQS) to buffer requests, and ensure the Lambda function has sufficient concurrency and is not being throttled.
E) Migrate the external function to a Snowflake Java UDF to minimize network latency, and reduce the payload size sent to the external function. Verify that the AWS Lambda function and Snowflake instance are in the same region.

2. You are developing a Snowflake Native Application that needs to access data residing in the consumer's account. The application requires specific permissions to read certain tables and execute specific functions. How should you define and manage these access privileges to ensure both security and functionality?

A) Create a new database role and grant the required permissions to the database role, later grant the database role to the application role. Use secure views for access to consumer data.
B) Use the 'GRANT OWNERSHIP' command to transfer ownership of the required tables and functions to the application's service account. This gives the application full control over these resources.
C) Grant the 'ACCOUNTADMIN' role to the application. This provides unrestricted access to all resources in the consumer's account, simplifying development and deployment.
D) Rely on the consumer to manually grant the necessary privileges to the application's service account after installation. Provide clear instructions in the application's documentation.
E) Define a custom role within the application package with the minimum required privileges (e.g., 'SELECT on specific tables, 'USAGE on specific functions). The consumer then grants this role to the application during installation. Use secure views if needed.

3. A provider develops a Snowflake Native Application that requires access to consumer's 'ORDERS' table for data enrichment. The provider has created an object role 'app_role'. Which of the following steps are REQUIRED for the application to successfully access and query the 'ORDERS table in the consumer's environment during the installation phase?

A) The consumer grants USAGE privilege on the schema containing the 'ORDERS' table to the provider account.
B) The provider grants OWNERSHIP on the 'app_role' role to the application.
C) The consumer grants USAGE privilege on the database containing the 'ORDERS' table to the provider account.
D) The consumer grants IMPORTED PRIVILEGES on the share containing the 'ORDERS table to the 'app_role' in the provider account.
E) The consumer creates a new role, grants SELECT on the 'ORDERS' table to this role, and then grants the role to the application's 'app_role' in the consumer account. The application manifest specifies the consumer_role.

4. A consumer installs a Snowflake Native Application from the Marketplace. The application requires access to a specific table, 'CUSTOMER DATA' , in the consumer's account. Which of the following steps are essential for the consumer to properly grant the application the necessary permissions, following least privilege principles, and ensuring the application functions as intended? Assume the application developer has properly requested the table grant in the setup script.

A) Grant 'OWNERSHIP' on the "CUSTOMER_DATR table to the application role. This provides the application with complete control over the table.
B) Create a share from the provider account granting access to the 'CUSTOMER DATA' table and import it into the consumer account.
C) Grant the 'USAGE privilege on the database and schema containing 'CUSTOMER_DATA' to the application role and then grant 'SELECT on the 'CUSTOMER DATA table to the application role.
D) Grant the 'SELECT privilege directly on the 'CUSTOMER_DATA' table to the 'SNOWFLAKE.APP_ROLE' role associated with the application instance.
E) Grant the 'IMPORTED PRIVILEGES privilege on the database containing 'CUSTOMER_DATX to the application role created during installation.

5. A provider is developing a Snowflake Native Application that shares event data with consumers. The provider wants to ensure that specific columns in the event data are obfuscated for certain consumer accounts, while remaining visible to others. Which of the following approaches is the MOST secure and maintainable way to achieve this?

A) Data masking is not supported in Native Apps. The provider must rely on consumer-side masking implementations.
B) Use a stored procedure to query the event data, applying obfuscation logic based on the consumer's APP INSTANCE ID() before returning the results.
C) Create a separate view for each consumer account with the sensitive columns masked using a CASE statement based on the CURRENT_ACCOUNT() function.
D) Implement conditional logic within the event table function to obfuscate data based on the consumer's APP_INSTANCE_ID().
E) Implement dynamic data masking policies on the sensitive columns using the CURRENT_ACCOUNT() function to determine which accounts receive obfuscated data.

Solutions: