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Snowflake NAS-C01 Exam Syllabus Topics:

Section	Weight	Objectives
Snowflake Native Applications Design and Creation	35%	- Apply Snowflake best practices while building native application workloads 1. Design scalable applications 2. Build, distribute, and monetize apps in Snowflake - Create and manage billing events and cost monitoring techniques 1. Formulate Snowflake native application workflows and procedures
Snowflake Native App Framework Overview	20%	- Understand Snowflake architecture, features, tools, and best practices 1. Account security and access management 2. Data sharing and protection mechanisms 3. Cloud-based computing and storage concepts
Snowflake Native Applications Installation and Testing	20%	- Install and test native applications 1. Validate application functionality and performance
Snowflake Native Applications Deployment	25%	- Build, version, and release native applications 1. Use data sharing for app interoperability 2. Use Snowflake's marketplace

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最新的 SnowPro Core Certification NAS-C01 免費考試真題 (Q221-Q226):

問題 #221
You are preparing a Snowflake Native Application for its initial release. You have a 'setup.sqP file that creates necessary tables and roles. You are also planning for future updates. Which of the following practices will BEST ensure smooth, version-upgrade compatible deployments for your application's consumers?

A. Avoid using 'CREATE OR REPLACE TABLE in 'setup.sqr and always use 'CREATE TABLE IF NOT EXISTS.
B. Use stored procedures within 'setup.sqr to encapsulate schema changes and data migrations, making them idempotent.
C. Use a consistent naming convention for all application objects and clearly document any breaking changes in release notes.
D. Always drop and recreate all application objects in each new version's 'setup.sqr to ensure a clean slate.
E. Include detailed comments in 'setup.sql' explaining the purpose of each SQL statement and the logic behind schema changes.

答案：B,C,E

解題說明：
Options B, D, and E will BEST ensure smooth, version-upgrade compatible deployments: Option B: A consistent naming convention and clear documentation of breaking changes enable consumers to understand the impact of updates and adjust their applications accordingly. Option D: Encapsulating schema changes and data migrations within idempotent stored procedures ensures that 'setup.sqr can be run multiple times without causing unintended side effects. This is crucial for handling failed upgrades or re-deployments. Option E: Detailed comments within setup.sqr make the script easier to understand and maintain, both for the application developer and for consumers who may need to troubleshoot or customize the application. Option A is good practice but 'CREATE OR REPLACE TABLE is appropriate for views and functions. Option C is generally a bad practice, as it can lead to data loss or disruption if not handled carefully.

問題 #222
You are building a Snowflake Native Application that needs to store configuration data within the application package. This configuration data needs to be accessible by all components of the application, but should not be directly exposed to the consumer. What is the RECOMMENDED approach to securely store and access this configuration data?

A. Store the configuration data in a dedicated table within the application database and grant SELECT privilege only to the application role.
B. Store the configuration data as environment variables within the application's setup script.
C. Encrypt the configuration data and store it in a named internal stage within the application package. Create a UDF within the application to decrypt and retrieve the data when needed.
D. Store the configuration in a file within the application package and load it into a temporary table during application initialization. Only grant access to the application role.
E. Store the configuration data in a JSON file within a stage in the provider account and grant the application role USAGE privilege to the stage.

答案：C

解題說明：
Encrypting the configuration data and storing it in a named internal stage (Option D) provides the highest level of security. The encryption ensures that the data is protected even if the application package is compromised. The UDF allows controlled access to the decrypted data within the application, preventing direct exposure to the consumer. Option A exposes data outside of the application, option B provides more access then needed. Options C and E are not appropriate. Option C is volatile, option E stores data outside of the install package.

問題 #223
You are developing a Snowflake Native Application that uses a UDF to process data in the consumer's account. The UDF needs to access a specific table in the consumer's account but the UDF is running as Invoker's Rights (IR). Select all that apply to securely configure data access for this scenario using a data access framework and least privilege principles:

A. Create a secure view that exposes only the necessary columns of the table, granting 'SELECT privilege on the secure view to the application's invoker role. Configure the UDF to select from this secure view.
B. Create an API integration that enables the UDF to securely authenticate and access the data through an external service.
C. Grant 'SELECT privilege on the specific table to the application's service user role. Configure the UDF to run as OWNER, and use 'EXECUTE AS OWNER.
D. Grant 'SELECT privilege on the specific table directly to the application's invoker role.
E. Create a stored procedure running as OWNER, grant necessary privileges, then call this SP from UDF running as Invoker.

答案：A,E

解題說明：
Options B and E are correct. Option B implements the data access framework with least privilege using secure views. Granting direct SELECT access (Option C) to the table to the invoker role is not recommended because it exposes the entire table and it will not work as IR UDF cannot directly access consumer data. Using external services(Option D) is an option, but not the most efficient for accessing local data. Option A won't work directly without proper data access framework as it is. Data access framework will solve this issue. Using an intermediate SP as OWNER called by the UDF as INVOKER is a valid approach.

問題 #224
After publishing your Snowflake Native Application on the Marketplace, you discover that a critical security vulnerability has been identified in a third-party library included in your application package. You need to quickly address this issue and push an updated version to your consumers. What is the recommended sequence of steps to remediate this vulnerability with minimal disruption to your users?

A. 1. Deprecate the current version of the application. 2. Develop and test a new version with the updated library. 3. Publish the new version to the Marketplace. 4. Announce the new version to consumers.
B. 1. Create a patch for the existing application. 2. Deploy the patch to all consumer accounts. 3. Notify consumers of the updated patch.
C. 1. Immediately unlist the current version of the application. 2. Develop and test a new version with the updated library. 3. Publish the new version to the Marketplace. 4. Announce the new version to consumers.
D. 1. Develop and test a new version with the updated library. 2. Publish the new version to the Marketplace. 3. Deprecate the vulnerable version. 4. Announce the new version to consumers.
E. 1. Develop and test a new version with the updated library. 2. Publish the new version as a private listing to selected consumers for testing. 3. Once validated, publish the new version to the Marketplace. 4. Deprecate the vulnerable version. 5. Announce the new version to consumers.

答案：D

解題說明：
The recommended approach prioritizes a swift update with minimal disruption. Developing and testing a new version, publishing it, deprecating the old version, and then announcing it ensures continuous availability. Unlisting (D) or immediately deprecating (A) the application causes disruption. Patches (B) are not the standard procedure for Native Apps. A private listing (C) adds unnecessary complexity in this urgent scenario.

問題 #225
You are developing a Snowflake Native Application package that provides a set of UDFs for data transformation. The UDFs require specific Snowflake privileges to access data in consumer accounts. Which of the following methods can ensure your application has the necessary privileges when installed in a consumer account? (Choose all that apply)

A. Create a separate role in the consumer account and grant the necessary privileges to that role. Have the application assume this role.
B. Leverage 'GRANT APPLICATION ROLE ... ON ..: statements in the setup script to grant the APPLICATION role the required privileges.
C. Instruct consumers to manually grant the necessary privileges to the APPLICATION role after installation.
D. Request the required privileges in the application package manifest file ('manifest.yml'
E. Use 'GRANT OWNERSHIP' to grant the APPLICATION role ownership of the target objects in the consumer account.

答案：B,D

解題說明：
The application package 'manifest.yml' file is where you declare the resources your application needs and the privileges it requires. The 'GRANT APPLICATION ROLE ON statement, executed during the setup script, is the correct way to grant the APPLICATION role the necessary privileges on objects in the consumer account. Requiring consumers to manually grant privileges is not a scalable or secure solution. 'GRANT OWNERSHIP is generally not necessary or recommended as it gives the application full control over the object. Creating a separate role in the consumer account and having the application assume it is an overly complex solution when 'GRANT APPLICATION ROLE is available.

問題 #226
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