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Snowflake NAS-C01 Exam Syllabus Topics:

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

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Snowflake SnowPro Specialty - Native Apps Sample Questions (Q274-Q279):

NEW QUESTION # 274
You're developing a Snowflake Native Application and want to control access to different features based on roles. You have a Streamlit application that displays sensitive data, and you only want users with the 'DATA ANALYST and 'ADMIN' roles to be able to view this dat a. Which of the following methods or a combination of methods are MOST appropriate for enforcing this role-based access control within your Streamlit application and the underlying Snowflake resources?

A. Create a stored procedure that checks the user's role using 'CURRENT and returns the requested data only if the role matches or ' ADMIN'. Call this stored procedure from your Streamlit application. Do not grant any direct privileges on the underlying tables to the 'DATA_ANALYST or 'ADMIN' roles. Set the 'EXECUTE AS CALLER property on the stored procedure.
B. Within the Streamlit application, use the function to check for a URL parameter containing the user's role. If the role matches or 'ADMIN', display the data; otherwise, display an error message. Grant 'SELECT' privilege on the underlying data tables to the DATA ANALYST and 'ADMIN' roles directly.
C. Implement row-level security (RLS) policies on the underlying tables to filter data based on the user's role. Then, within the Streamlit application, simply display the data without any explicit role checks. The RLS policies will automatically ensure that users only see the data they are authorized to see. Grant 'SELECT privilege on the underlying data tables to the 'DATA ANALYST and 'ADMIN' roles directly.
D. Within the Streamlit application, use 'snowflake.connector' to execute 'SELECT and check if the returned role matches DATA ANALYST or 'ADMIN'. If so, display the data; otherwise, display an error message. Grant USAGE' privilege on a custom role, and grant 'SELECT on the underlying tables and USAGE on the schema to that custom role. Finally grant the 'DATA_ANALYST and 'ADMIN' roles to this custom role.
E. Create a custom python module that checks if the user's role matches "DATA_ANALYST or 'ADMIN' and configure it for role based access control.

Answer: A,C

Explanation:
The MOST appropriate methods are C and D. Option C: Using a stored procedure with 'EXECUTE AS CALLER and role checks provides a robust and secure way to control data access. The stored procedure acts as a gatekeeper, ensuring that only authorized roles can retrieve the data. Option D: Implementing row-level security (RLS) adds an additional layer of security by filtering data at the database level based on the user's role. This ensures that even if a user were to bypass the Streamlit application's role checks, they would still only be able to see the data they are authorized to see. Option A is susceptible to tampering and does not enforce data-level security. Option B requires an added level of complexity with an extra custom role and is unnecessary. Option E does not secure at the database level.

NEW QUESTION # 275
You are deploying a containerized application within a Snowflake Native App using Snowpark Container Services (SPCS). This application needs to interact with Snowflake's metadata, specifically retrieving information about tables and views within the customer's account. Which of the following methods is the MOST appropriate and secure way to achieve this?

A. Creating a REST endpoint within the container that accepts SQL queries as input and executes them against Snowflake using the application's internal service account, then returns the results as JSON.
B. Using the Snowflake CLI (snowsql) within the container, configured with the application's service account credentials, to execute queries against the INFORMATION SCHEMA.
C. Exposing a Snowflake UDF as an API endpoint that the container can call to retrieve metadata. The UDF executes the SQL queries against the INFORMATION SCHEMA.
D. Using the 'snowflake-jdbc' driver directly within the container, configured with the customer's Snowflake account credentials, which are passed as environment variables.
E. Leveraging the Snowpark Python API within the container to execute SQL queries against the Snowflake INFORMATION_SCHEMA views.

Answer: E

Explanation:
Option B is the most appropriate and secure method. Snowpark Python API provides a secure and managed way to interact with Snowflake, leveraging the application's service account without exposing sensitive credentials directly within the container or requiring direct JDBC connections. Options A is highly insecure due to exposing credentials. Options C is viable, but requires extra management and maintenance of REST endpoint. Option D is possible but less secure than B for native apps. Option E adds unnecessary complexity.

NEW QUESTION # 276
You are designing a Snowflake Native Application that requires granular control over the privileges granted to different application roles. You want to follow the principle of least privilege. You have the following requirements: Application roles , and app_read_only'. What is the most effective strategy to implement this using definer's rights?

A. Create views for each application role, granting SELECT privilege on the necessary tables to each view. Then, grant SELECT privilege on the appropriate view to each application role.
B. Create separate schemas for each application role, placing objects with different privileges into these schemas. Then, grant the appropriate privileges on each schema to the corresponding application role.
C. Grant all privileges on all application objects to the 'app_admin' role and rely on the consumer to manage privilege inheritance for other roles.
D. Create stored procedures owned by the application, with each stored procedure performing actions within the app. Grant OWNERSHIP on each stored procedure to the application admin. Consumers must then grant USAGE on these procedures to their desired roles.
E. Create stored procedures owned by the application, with each stored procedure explicitly granting the required privileges to the corresponding role. Consumers must then grant USAGE on these procedures to their desired roles.

Answer: E

Explanation:
Using stored procedures owned by the application and using DEFINER's rights offers the most granular control and aligns with the least privilege principle. The application provider defines the privileges within the stored procedures. The consumer only needs to grant USAGE on the stored procedures. Creating views or separate schemas can work, but they add complexity. Granting all privileges to the 'app_admin' role is too permissive and doesn't adhere to the principle of least privilege.

NEW QUESTION # 277
You are tasked with automating the installation of a Snowflake Native Application across multiple consumer accounts using the Snowflake Marketplace. The installation process must be idempotent (running the installation script multiple times should not cause errors or unexpected behavior). You have the following requirements: 1. Check if the application is already installed. 2. If not installed, install the application from the Marketplace. 3. Grant specific privileges on the installed application to a role within the consumer account. Which of the following Snowflake Scripting (SnowSQL) snippets BEST implements this idempotent installation process? Assume 'application name', 'application _ package', 'consumer role', and 'marketplace listing url' are pre-defined variables.

Answer: C

Explanation:
Option D provides the best approach. It first checks if the application already exists using 'SHOW APPLICATIONS LIKE 'application_name' and If the application does not exist (count is 0), it proceeds to install the application from the Marketplace using 'CREATE APPLICATION ... FROM MARKETPLACE. The 'GRANT USAGE statement is executed regardless of whether the application was just installed or already existed, making the entire process idempotent. A,B,C do not account for idempotency. E is not idempotent for granting the role.

NEW QUESTION # 278
You are publishing a Snowflake Native Application to the Marketplace. You've completed initial testing, and the application appears to function as expected. However, the security scan consistently fails with a 'Data Exfiltration' error. The application includes a stored procedure that aggregates data from several tables within the application container and writes the results to an external stage using the 'COPY INTO' command. Review the following code snippet:

Which of the following changes is MOST likely to resolve the 'Data Exfiltration' error during the security scan?

A. Remove the 'GRANT EXECUTE privilege on the 'export_data' procedure from the 'app_public' role.
B. Implement row-level security policies on the 'aggregated_data' table to restrict access to sensitive rows.
C. Require the consumer to explicitly grant the application usage privilege on a secure external stage controlled by the consumer, and modify the procedure to validate the stage's existence and permissions before exporting data.
D. Modify the stored procedure to only export data to a table within the application container instead of an external stage.
E. Encrypt the data written to the external stage using client-side encryption with a key managed by the application provider.

Answer: C

Explanation:
The 'Data Exfiltration' error indicates a potential risk of unauthorized data leaving the consumer's Snowflake environment. The root cause is often that the application provider has unrestricted control over where the data is exported. The solution is to require the consumer to control the external stage and explicitly grant the application usage privilege on it. This ensures that the consumer is aware of and approves the data export. Option A would break the functionality. Option B addresses data access within the container but doesn't prevent exfiltration if the application can still write to an uncontrolled stage. Option D adds complexity but doesn't fundamentally address the control issue. Option E restricts functionality unnecessarily.

NEW QUESTION # 279
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