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Snowflake NAS-C01 Exam Syllabus Topics:

Section	Weight	Objectives
Topic 1: Installation, Testing and Troubleshooting	20%	- Validation and debugging 1. Tracing and troubleshooting workflows 2. Logging and event tables
Topic 2: Deployment and Marketplace Publishing	25%	- Distribution and lifecycle management 1. Version upgrades and release management 2. Marketplace listings and publishing
Topic 3: Native Application Design and Creation	35%	- Application development workflow 1. Application roles and privileges 2. Building and versioning applications
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 (Q168-Q173):

質問 # 168
A Snowflake Native App aims to provide data masking as a service. The app needs to access customer data, apply masking policies based on app-managed configuration, and store the masked data either in the customer's account or in the app's managed account based on customer preference. Which of the following steps and considerations are CRUCIAL for designing this application, focusing on security and privilege management? (Select all that apply)

A. Use secure views to access the customer's data, ensuring that the app only sees the data it is authorized to access based on requested READ privileges.
B. Implement the data masking logic within stored procedures that execute with the CALLERS RIGHTS to leverage the customer's existing masking policies.
C. Ensure the application uses the SNOWFLAKE.CORE.INVOKE FUNCTION to call data masking policies with the consumer's data.
D. Use stored procedures that execute with DEFINER'S RIGHTS and request necessary READ privileges on the customer's database and tables.
E. Request the OWNERSHIP privilege on the customer's tables to ensure full control over data masking.

正解：A、D

解説：
The correct answers are C and E. Requesting OWNERSHIP (A) is excessive and poses a security risk. Using CALLER'S RIGHTS (B) would mean the app's functionality relies on the installing user's privileges and won't work if they don't have sufficient access. The INVOKE_FUNCTION is not needed. Using DEFINER'S RIGHTS (E) allows the app to execute with its own defined privileges, ensuring consistent behavior regardless of the installing user. Secure views (C) limit the app's access to only the authorized data, enhancing security.

質問 # 169
You are developing a Snowflake Native Application that utilizes Snowpark Container Services (SPCS) to run a machine learning model within the customer's Snowflake environment. The application requires access to data stored in a secure stage within the customer's account. Considering security best practices and the limitations of SPCS in Native Apps, what is the most secure and recommended approach to grant the container access to the customer's data stage?

A. Creating a Snowflake Stored Procedure with 'EXECUTE AS CALLER rights and granting the application's service account execute access to the stored procedure. The stored procedure reads data from the secure stage and returns it to the container via a secure data sharing mechanism.
B. Granting the application's service account the 'READ privilege directly on the secure stage. This ensures the container can directly access the data.
C. Creating a Snowflake UDF that reads data from the secure stage and exposes it through a secure view, which the container accesses using the application's service account.
D. Packaging the data within the application package during the build process. This eliminates the need for runtime access to the customer's data stage.
E. Utilizing a Snowflake external function that proxies the data access request to an external API gateway managed by the provider, which then fetches the data from the secure stage. This keeps the access credentials out of the customer's environment completely.

正解：A、C

解説：
Options B and E are the most secure and recommended approaches. Option B uses a UDF and secure view to abstract the data access, limiting the container's direct access to the secure stage and leveraging Snowflake's security features. Option E uses a Stored Procedure executed as the caller to access the data on behalf of the application's service account. This allows the service account access to the stored procedure itself, but the access to the underlying stage is controlled by the owner of the stored procedure and not the application. Options A is less secure as it directly grants access to the stage. Option C, while secure in principle, overcomplicates the data access pattern and relies on external infrastructure. Option D is not feasible for large datasets and is generally not a scalable solution.

質問 # 170
You are packaging a Snowflake Native App that includes Python code and several supporting data files (e.g., configuration files, sample datasets). What are the correct steps to upload these files to a stage for inclusion in your application package, and how do you ensure the Python code is correctly referenced?

A. Use the Snowflake web interface to upload all files to an internal stage. Reference the Python code within the setup.py file using relative paths.
B. Employ the Snowflake JDBC driver to programmatically upload the files to an internal stage. Update the setup.py file to install the Python dependencies and reference the data files as resources.
C. Use 'snowcli' to create and manage stages. Structure the application directory appropriately, listing Python code and data files in 'manifest.yml' for correct packaging.
D. Use the 'snowcli' command-line tool to upload the files to a stage. In the setup.py file, ensure that the Python code is referenced correctly, and the data files are listed as package data.
E. Upload the Python code directly to a Snowflake UDF using the web interface. Upload the data files to an external stage accessible via a URL, and reference them in the application code.

正解：C、D

解説：
'snowcli' is the recommended tool for managing Snowflake Native App development, including stage management and file uploads. The 'setup.py' file is crucial for specifying dependencies and including data files as package data. Newer native apps use 'manifest.ymr to declare stage resources and dependencies. Using JDBC for uploading is possible, but less convenient than 'snowcli' . Referencing files via URLs from external stages introduces unnecessary complexity and security risks. Direct uploading to UDFs is not a method for including all app assets.

質問 # 171
You are developing a Snowflake Native App that processes sensitive customer dat a. Your app needs to access data from a table owned by the consumer and write transformed data back to another table also owned by the consumer. To ensure data privacy and security, you decide to use a secure view for accessing the customer data and a stored procedure for writing the transformed data.
However, you are facing issues with privilege escalation when the stored procedure tries to access the secure view. The stored procedure is defined with the 'EXECUTE AS CALLER clause. Which of the following steps can you take to mitigate this privilege escalation issue and ensure secure data access?

A. Change the stored procedure to run with the 'EXECUTE AS OWNER clause. Ensure the consumer grants 'IMPORTED PRIVILEGES' on their database to your application. Create a database role owned by the application and grant USAGE on database to it and SELECT on secure view to the database role.
B. Change the stored procedure to run with the 'EXECUTE AS OWNER clause. Ensure the consumer grants 'IMPORTED PRIVILEGES' on their database to your application. Create a database role owned by the application and grant USAGE on database to it and SELECT on secure view to the database role. Also, grant the consumer database ownership to the application.
C. Revoke the 'SELECT privilege on the secure view from the application role. Grant the 'SELECT' privilege on the secure view directly to the stored procedure using the 'GRANT ... TO PROCEDURE syntax.
D. Grant the 'EXECUTE MANAGED TASK' privilege to the application role. Change the stored procedure to run with the 'EXECUTE AS OWNER clause. Ensure consumer grants 'IMPORTED PRIVILEGES' on their database to your application.
E. Grant the 'APPLY MASKING POLICY privilege on the customer data table to the application role. Define masking policies on the sensitive columns of the customer data table.

正解：A

解説：
When using ' EXECUTE AS CALLER , the stored procedure executes with the privileges of the user calling it, which can lead to privilege escalation. To avoid this, switch to 'EXECUTE AS OWNER , which runs the procedure with the privileges of the procedure's owner (the application). Consumers granting 'IMPORTED PRIVILEGES' allows the application to access database objects. A database role owned by the application ensures consistent privileges, and granting USAGE on the database and SELECT on the secure view to this role provides the necessary access. The app should not get OWNERSHIP of the CONSUMER Database.

質問 # 172
A Snowflake Native App installed in a consumer account needs to access data in a specific table within the consumer's account to perform its core functionality. Which of the following is the MOST secure and recommended way for the application to gain access to this data? (Assume the application developer does not have direct access to the consumer's Snowflake account.)

A. The consumer grants the "GLOBAL' privilege 'SELECT on the table directly to the application package name.
B. The application provider requests the 'IMPORTED PRIVILEGES on the consumer account, allowing the application to access any object within the account.
C. The consumer shares the table directly with the application provider's Snowflake account.
D. The application prompts the consumer for their Snowflake account credentials and uses those credentials to access the data.
E. The consumer creates a secure view on top of the table and grants 'SELECT privilege on the secure view to the application's installed application object (application instance).

正解：E

解説：
The MOST secure approach is to create a secure view on top of the table and grant 'SELECT privilege on the secure view to the installed application. This limits the application's access to only the data exposed by the view, minimizing the potential security risk. Granting access directly to the application package (option A) is not supported. Requesting 'IMPORTED PRIVILEGES (option B) is too broad and insecure. Sharing the table with the provider (option D) is not necessary and adds complexity. Asking for credentials (option E) is a major security violation. Secure Views prevent direct access to underlying tables while still allowing applications to function as intended.

質問 # 173
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天帝様は公平ですから、人間としての一人一人は完璧ではないです。私のように、以前が努力しなかったので、今は無駄に悩んでいます。現在のIT領域で競争が激しくなっていることは皆は良く知っていますから、みんなはIT認証を通じて自分の価値を高めたいです。私もそう思いますが、IT認証は私にとって大変難しいです。でも、幸い私はインターネットでTopexamのSnowflakeのNAS-C01試験トレーニング資料を見つけました。それを手に入れてから私は試験に合格する自信を持つようになります。TopexamのSnowflakeのNAS-C01試験トレーニング資料のカバー率がとても高いですから、自分で勉強するよりずっと効率が高いです。あなたもIT業種の一人としたら、ためらわずにTopexamのSnowflakeのNAS-C01試験トレーニング資料をショッピングカートに入れましょう。Topexamはきっとあなたが成功への良いアシスタントになります。

NAS-C01トレーニング資料: https://www.topexam.jp/NAS-C01_shiken.html