NAS-C01 Online Prüfungen, NAS-C01 Prüfungsfragen

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Snowflake NAS-C01 Exam Syllabus Topics:

Section	Weight	Objectives
Topic 1: Advanced Features & Management	20%	- Integration with Snowpark and external services - Billing events and cost monitoring - Governance and compliance - Event logging and telemetry
Topic 2: Application Deployment & Distribution	25%	- Versioning and release management - Upgrades and lifecycle management - Publishing to Snowflake Marketplace - Listing types and monetization
Topic 3: Application Installation & Testing	20%	- Installation procedures and dependencies - Testing strategies and validation - Debugging and troubleshooting - Provider and consumer workflows
Topic 4: Application Design & Creation	35%	- Security and access control - Native App Framework architecture - Setup scripts and application logic - Application packages and objects - Manifest files and configuration

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Snowflake SnowPro Specialty - Native Apps NAS-C01 Prüfungsfragen mit Lösungen (Q330-Q335):

330. Frage
You have a Snowflake Native Application that utilizes a managed table. After upgrading your application to version 2.0, some users report that they are missing data in the managed table. After investigation, you realize version 2.0 changed the schema of the managed table and also did not properly migrate all the data from old format into new format. Which of the following steps should be taken to address the missing data after upgrading a Snowflake Native Application?

A. Create a new version 2.1 that includes a data migration script to transfer data from the old schema (as it existed in version 1.0) to the new schema in version 2.0. Use release directives to upgrade affected users to version 2.1 after staging.
B. Since managed tables are fully managed by Snowflake, contact Snowflake support to initiate a data recovery process in each affected consumer account.
C. Manually insert the missing data into the managed table in each consumer's account, contacting affected users to coordinate the data entry.
D. Rollback all users to version 1.0 and then perform the schema migration directly on the consumer's account using custom SQL scripts.
E. Create a new version 2.1. Within version 2.1's setup script, dynamically detect if the application is an upgrade from 1.0 and, if so, execute the data migration script to transfer data from the old schema to the new schema.

Antwort: E

Begründung:
Option D is the correct approach. By dynamically detecting the upgrade and running a data migration script, the application ensures data integrity during the upgrade process. The data migration script will convert data from old format to new format. Option A is almost correct, however we don't assume the user is at 1.0. The application may be updated from earlier versions as well. Option B is not feasible due to operational overhead of doing it for each consumers and requires high privilege on consumer side which is not allowed for native apps. Option C is not practical or scalable. Managed tables are managed by your application code within the package, so Snowflake support won't perform data manipulation (Option E).

331. Frage
You are developing a Snowflake Native Application that manages customer accounts. In version 1.0, you had a table named 'CUSTOMER_ACCOUNTS with columns 'ACCOUNT D', 'CUSTOMER NAME, and 'EMAIL'. You are now releasing version 2.0, which requires adding a new column 'PHONE NUMBER to the 'CUSTOMER ACCOUNTS table, but you need to ensure backward compatibility and allow seamless upgrades for existing installations. Which of the following approaches within the 'setup.sqr file is the MOST robust and reliable to implement this schema change without disrupting existing users?

Antwort: E

Begründung:
Option E is the most robust because it explicitly checks for the existence of the column before attempting to add it. This prevents errors during upgrade if the column already exists (e.g., if a previous upgrade failed partially). Using a stored procedure within 'setup.sqr provides more control and avoids syntax errors that might arise from 'IF statements directly in the script. Option A, B and C would fail if the column already exists, throwing an error and halting the upgrade process. Option D is destructive, as it drops and recreates the table, leading to data loss. Therefore, option E is the most reliable and production-ready.

332. Frage
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. 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.
B. 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.
C. 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.
D. 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.
E. 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.

Antwort: D

Begründung:
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).

333. Frage
You're packaging a Snowflake Native App and need to define the minimum Snowflake version required for installation. You also want to specify an optional PARAMETER that users can configure during installation to customize the app's behavior. Which section of the manifest file allows you to achieve this?

A. The 'deployment.sql' file where you define the app's deployment settings.
B. The 'metadata.json' file, which only contains descriptive information about the app.
C. The 'privileges.sql' file, where you define the privileges required by the application.
D. The 'application.yaml' file under the 'configuration' section, where you can specify and define PARAMETERS with their types and default values.
E. The 'setup.sqrl' file, where you define SQL commands to be executed during app installation.

Antwort: D

Begründung:
The 'application.yaml' file is the core configuration file for a Snowflake Native App. It's where you define the to ensure compatibility and declare PARAMETERS with their data types, descriptions, and optional default values, enabling customization during app installation.

334. Frage
You are designing the 'privileges.sqr file for a Snowflake Native App. The app requires the ability to create and manage internal stages within the consumer's account to store temporary dat a. Which of the following SQL statements in 'privileges.sqr would correctly grant the necessary privileges to the application role (assuming the application role is named 'APP ROLE)?

Antwort: A

Begründung:
To create stages, the application role needs the 'CREATE STAGE' privilege. This privilege needs to be granted on the schema where the stages will be created, and usage privilege is also needed. Granting it at the database level is too broad (B, C, E), and only granting warehouse usage (A) doesn't address the requirement of creating stages.

335. Frage
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