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Snowflake NAS-C01 Exam Syllabus Topics:

Section	Weight	Objectives
Topic 1: Native Application Design and Creation	35%	- Application development workflow 1. Application roles and privileges 2. Building and versioning applications
Topic 2: Installation, Testing and Troubleshooting	20%	- Validation and debugging 1. Logging and event tables 2. Tracing and troubleshooting workflows
Topic 3: Deployment and Marketplace Publishing	25%	- Distribution and lifecycle management 1. Marketplace listings and publishing 2. Version upgrades and release management
Topic 4: Snowflake Native App Framework Overview	20%	- Native application concepts and architecture 1. Manifest files and setup scripts 2. Application packages and structure

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Snowflake SnowPro Specialty - Native Apps 認定 NAS-C01 試験問題 (Q81-Q86):

質問 # 81
Consider the following Python code snippet used within a Streamlit application deployed as a Snowflake Native App:

A. The code will execute without any privilege errors, assuming the necessary database and schema privileges are granted to the 'app_public' role.
B. The code will fail because the Snowflake Connector for Python requires explicit connection parameters to be defined even within a Native App context.
C. The code will fail with a privilege error if the 'app_public' role does not have OWNERSHIP of the table 'my_table' .
D. The code will execute successfully, assuming that Smy_table' exists, and the 'app_public' role has at least SELECT privilege on 'my_table' and USAGE privilege on the schema containing 'my_table' .
E. The code requires using the 'snowflake.snowpark' library instead of for optimized performance within native apps.

正解：D

解説：
The correct answer is D. When running within a Snowflake Native App, the Snowflake Connector for Python automatically uses the current session context, eliminating the need for explicit connection parameters. The code will execute successfully provided that the 'app_public' role has the appropriate privileges, which includes 'SELECT on 'my_table' and 'USAGE on the schema containing the table. Option A is partially correct, but option D provides more specific privilege requirements. Option B is incorrect because explicit connections aren't needed. Option C is incorrect because 'OWNERSHIP' isn't required, only 'SELECT. Option E is incorrect; using 'snowflake.snowpark' may offer performance benefits for data processing, but using "snowflake.connectofl is viable for simple queries.

質問 # 82
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 'IMPORTED PRIVILEGES privilege on the database containing 'CUSTOMER_DATX to the application role created during installation.
D. 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.
E. Grant the 'SELECT privilege directly on the 'CUSTOMER_DATA' table to the 'SNOWFLAKE.APP_ROLE' role associated with the application instance.

正解：D

解説：
Option D is correct because it grants the minimum required privileges for the application to access the 'CUSTOMER_DATX table. Granting USAGE' on the database and schema allows the application to navigate to the table. Granting 'SELECT' on the table itself allows the application to read the data. Options A, B, C and E are incorrect because they either grant excessive privileges, are not the correct approach for Native Apps (Shares), or grant permissions to the wrong role.

質問 # 83
You are developing a Snowflake Native Application that provides data enrichment services. You want to offer tiered pricing based on the number of API calls made by consumers. Which of the following is the most effective approach to implement usage-based billing and track API call consumption within your application?

A. Implement a UDF within the application that increments a counter in a shared table each time an API endpoint is called. Query this table to determine usage.
B. Utilize Snowflake's events table to capture API call events based on function executions, enabling precise tracking and reporting of API usage for each consumer.
C. Implement a custom logging mechanism within the application to track API calls and store the logs in a separate Snowflake database, accessible only to the provider. Use scheduled tasks to analyze these logs and generate billing data.
D. Leverage Snowflake's built-in metering framework using and 'SYSTEM$METER STAGE_STORAGE BYTES' to indirectly estimate API calls.
E. Use Snowflake's resource monitors to limit the compute resources available to consumers based on their chosen tier.

正解：A

解説：
Option A is the most effective as it directly tracks API calls within the application. Resource monitors (B) only control compute costs, not API usage. System$METER functions (C) track storage, notAPl calls. Custom logs (D) introduce complexity and security concerns. Snowflake's events table is a good general approach (E), but requires enabling detailed logging, which has performance implications and might not be available in all accounts. A shared table with a UDF provides the most direct and controllable way to meter usage.

質問 # 84
You are tasked with deploying a Snowflake Native Application that performs real-time data analysis. The application requires a warehouse to run and a user with specific privileges to access dat a. You want to automate the deployment process as much as possible, including warehouse creation, user provisioning, and privilege granting, all within the application package. Given the security considerations and best practices for Snowflake Native Applications, which of the following approaches is the MOST secure and recommended?

A. Include a SQL script within the application package that uses the 'CREATE WAREHOUSE, 'CREATE USER , and 'GRANT commands to create the warehouse, user, and grant necessary privileges. The script will be executed by the consumer upon installation.
B. Employ a secure deployment pipeline that leverages a separate, pre-authorized Snowflake account to provision the warehouse and useL The application package then only includes the application logic, assuming the resources already exist.
C. Utilize the 'INSTALL' privilege when creating the application package and execute the SQL script (containing 'CREATE WAREHOUSE, 'CREATE USER , and 'GRANT) within the application's setup script using the 'EXECUTE IMMEDIATE command. This allows the application to create resources within the consumer's account.
D. Use a setup script within the application package, granting it the 'APPLY APPLICATION PASSTHROUGH PRIVILEGES privilege. This will enable the application to inherit the privileges of the user who installed the application, allowing it to create the warehouse and user on their behalf.
E. Request the consumer to manually create the warehouse and user with the required privileges before installing the application. Provide detailed instructions in the application documentation.

正解：C

解説：
Option C is the most appropriate. Snowflake Native Apps are designed to operate within a secure sandbox. The INSTALL privilege, combined with EXECUTE IMMEDIATE within the setup script, allows the application to create the necessary resources within the consumer's account in a controlled and automated manner. Option A is less secure, as it relies on the consumer executing arbitrary SQL. Option B increases the burden on the consumer. option D is overly complex for this scenario. APPLY APPLICATION PASSTHROUGH PRIVILEGES is about leveraging the consumer's privileges for accessing THEIR data, not for the creation of resources (option E).

質問 # 85
You are developing a Snowflake Native Application that processes sensitive customer dat a. You want to ensure that your application has undergone a thorough security review before it is listed on the Snowflake Marketplace. Which of the following steps are mandatory to ensure that your application meets Snowflake's security requirements for a secure native application?

A. Enforce multi-factor authentication for all users accessing the application.
B. Obtain a third-party penetration test report for the application's code and infrastructure.
C. Submit your application for Snowflake Native App Security Review by filling out the security review intake form with all the necessary documentation.
D. Ensure all sensitive data is encrypted at rest and in transit using Snowflake's built-in encryption features.
E. Implement data masking policies on all sensitive data within the application.

正解：C

解説：
Submitting the application for Snowflake Native App Security Review is the core mandatory step. While options B, C, D, and E represent good security practices, the successful completion of the official security review process is a prerequisite to listing the application on the marketplace.

質問 # 86
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