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Snowflake NAS-C01 Exam Syllabus Topics:

Section	Weight	Objectives
Installation, Testing and Troubleshooting	20%	- Validation and debugging 1. Tracing and troubleshooting workflows 2. Logging and event tables
Native Application Design and Creation	35%	- Application development workflow 1. Application roles and privileges 2. Building and versioning applications
Deployment and Marketplace Publishing	25%	- Distribution and lifecycle management 1. Version upgrades and release management 2. Marketplace listings and publishing
Snowflake Native App Framework Overview	20%	- Native application concepts and architecture 1. Application packages and structure 2. Manifest files and setup scripts

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Snowflake SnowPro Specialty - Native Apps Sample Questions (Q159-Q164):

NEW QUESTION # 159
You are preparing to list your Snowflake Native Application on the Snowflake Marketplace. You've developed the application and implemented security measures. Which of the following steps are essential best practices for ensuring a successful and secure listing on the Snowflake Marketplace?

A. Implement robust error handling and logging mechanisms to provide consumers with informative error messages and aid in troubleshooting. Include mechanisms for securely collecting and storing application usage metrics (if required), ensuring compliance with privacy regulations.
B. Clearly communicate the application's security model, including data encryption methods, access controls, and any reliance on consumer-side security configurations. Undergo and document regular security audits and penetration tests of the application.
C. Thoroughly document the application's functionality, installation instructions, configuration options, and any known limitations. Provide clear and concise pricing information and support contact details.
D. Avoid documenting any limitations or potential issues with the application to present a flawless image to potential consumers. Only provide limited pricing information to create a sense of urgency to potential consumer
E. Include a prominently displayed disclaimer stating that the application is provided "as is" and the provider assumes no liability for any damages arising from its use. Only provide basic installation instructions. It is the end user's responsibility to know how to use the application.

Answer: A,B,C

Explanation:
Options A, B, and C are essential best practices. Thorough documentation (A) is crucial for consumer adoption. Robust error handling and logging (B) improve the user experience and facilitate troubleshooting. Clear communication of the security model (C) builds trust. Option D is unacceptable as it shifts responsibility unfairly to the consumer. Option E is also unethical, as consumers should know what to expect.

NEW QUESTION # 160
You are designing the setup script for a Snowflake Native Application. This application requires the creation of several views based on data residing in the consumer's account. These views need to be dynamically created based on a configuration table that is part of your application package. The configuration table contains view names, the underlying tables in the consumer's account, and the specific SQL queries for each view. The design must adhere to best practices for security and data governance. Which approach would you use for designing this setup script, considering security vulnerabilities and execution context?

A. Employ parameterized SQL (using '?' 7 placeholders) within the 'CREATE VIEW' statements, binding the view names and queries read from the configuration table. Execute these statements using 'EXECUTE IMMEDIATE to prevent SQL injection vulnerabilities.
B. Use a stored procedure, owned by the application, to dynamically generate and execute the 'CREATE VIEW statements. The stored procedure reads the view definitions from the configuration table and creates the views using dynamic SQL.
C. Use dynamic SQL generation with proper escaping functions (e.g., to prevent SQL injection. Store the generated SQL in a temporary table, and then execute each statement from the temporary table using 'EXECUTE IMMEDIATE
D. Directly construct and execute the 'CREATE VIEW' statements within the setup script using string concatenation, reading the view definitions from the configuration table. This minimizes code complexity and ensures immediate view creation.
E. Create a series of static 'CREATE VIEW' statements within the setup script, each targeting a predefined table in the consumer's account. The application will handle data filtering within these views.

Answer: B

Explanation:
Option D represents the most secure and maintainable approach. By using a stored procedure owned by the application, you encapsulate the dynamic SQL generation and execution within a controlled environment. This reduces the risk of SQL injection vulnerabilities because the stored procedure is executed with the privileges of the application, and not the installer or end user. Parameterized SQL (Option B) is not directly supported for object names or complex SQL structures in Snowflake. String concatenation (Option A) is highly vulnerable to SQL injection. Using a temporary table (Option C) adds unnecessary complexity without significantly improving security. Static views (Option E) are inflexible and don't address the requirement of dynamic view creation.

NEW QUESTION # 161
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. 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.
B. 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.
C. 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.
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. 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.

Answer: E

Explanation:
Increasing the timeout in Snowflake, optimizing the Lambda function's performance (including code optimization and increasing memory allocation), and monitoring Lambda metrics are critical for addressing timeout issues. Lambda timeouts can occur if the function takes too long to execute, so increasing the timeout and optimizing performance can directly mitigate this. Furthermore, checking Lambda function metrics in CloudWatch can provide valuable insights into the root cause of performance problems. This combination tackles both the symptom (timeouts) and potential underlying causes (slow execution, resource constraints). Other answers only deal with some of the issues; without a performance-focused perspective, the problem could persist.

NEW QUESTION # 162
You are designing a Snowflake Native Application that provides a data enrichment service. Consumers provide their data via a secure data share, and your application enriches it with external datasets within your provider account. To ensure data security and prevent accidental data leakage, which of the following strategies should you implement when designing the application's logic (select all that apply)?

A. Grant the consumer's application role 'OWNERSHIP' privilege on the data share. This simplifies data management for the consumer.
B. Create a dedicated service user within your provider account with restricted privileges to access the shared data. The application's logic should execute using this service user's context.
C. Implement strict input validation and sanitization of the data received from the consumer to prevent SQL injection or other malicious attacks that could lead to data exfiltration.
D. Log all data access and modifications performed by the application, including the user context (application role), timestamps, and objects accessed, for auditing purposes.
E. Use fully qualified names when referencing objects within the consumer's shared data (e.g.,

Answer: C,D,E

Explanation:
Options B, D, and E are correct. B: using fully qualified names is crucial for unambiguously identifying the consumer's objects and preventing naming conflicts. D: Input validation is essential to protect against security vulnerabilities. E: Logging is vital for auditing and identifying potential security breaches. A is incorrect because granting ownership is excessive and insecure; the consumer should retain ownership. C is unnecessary and doesn't directly address the security concerns; using the application role provides sufficient context.

NEW QUESTION # 163
You are developing a Snowflake Native Application that utilizes a Streamlit frontend. The application requires access to specific data in the consumer account. You've already defined the necessary roles in your provider account. Which of the following steps are absolutely necessary to grant the Streamlit application the appropriate permissions to access the consumer's data? Assume the provider account has already shared the application package.

A. In the consumer account, create a new application role and grant the necessary privileges (e.g., 'SELECT on tables) to this role. In the Streamlit code, use streamlit.experimental_get_query_params()' to pass the role name as a query parameter to the application.
B. Define an application role in the application package and grant the necessary privileges within the package installation script using 'GRANT APPLICATION ROLE TO SHARE. In the consumer account, grant the application role to a user. No code changes are needed in the Streamlit application. Ensure to also grant the application role to the application in the install script with 'GRANT APPLICATION ROLE TO APPLICATION
C. Create a new database role in the provider account and grant the necessary privileges (e.g., 'SELECT on tables) to this role. Share this database role to the consumer account using secure data sharing. No code changes are needed in the Streamlit application.
D. Within the application package installation script, grant the necessary privileges (e.g., 'SELECT on tables) directly to the 'APPLICATION' object representing the installed application using 'GRANT ON TO APPLICATION In the consumer account, no further privilege grants are required. Also ensure to 'GRANT APPLICATION ROLE app_public TO APPLICATION'
E. In the consumer account, grant the 'IMPORTED PRIVILEGES privilege on the application package to a role that Streamlit will assume. Ensure the Streamlit application has code to execute 'snowflake.connector.connect()' with the correct consumer account credentials.

Answer: B,D

Explanation:
Options C and E are the most accurate. Option C is correct because it leverages application roles, which are the recommended way to manage privileges in Snowflake Native Apps. Granting the application role to a user in the consumer account allows them to access the data via the application. Option E is correct because granting privileges directly to the 'APPLICATION' object is essential for the application to function correctly with its own access rights. Additionally, granting 'app_public' ensures basic functionality is available to the application. Option A is incorrect because applications should not be connecting to the database using standard connectors with explicit credentials in Native Apps. Option B is incorrect because passing role names as query parameters is not a secure or recommended practice. Option D is incorrect because sharing a database role directly is not the appropriate mechanism for granting access within a Snowflake Native App. The application package and its associated roles should manage the access.

NEW QUESTION # 164
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