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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
Installation, Testing and Troubleshooting	20%	- Validation and debugging 1. Tracing and troubleshooting workflows 2. Logging and event tables
Deployment and Marketplace Publishing	25%	- Distribution and lifecycle management 1. Version upgrades and release management 2. Marketplace listings and publishing

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Snowflake SnowPro Specialty - Native Apps Sample Questions (Q269-Q274):

NEW QUESTION # 269
You are developing a Snowflake Native Application that needs to securely access data in a consumer's account. The application requires the consumer to grant specific privileges to a custom role created and managed within the application package. Which of the following steps are absolutely essential for correctly configuring the application package to ensure this secure data access, and how should the setup script handle the privilege granting?

A. Utilize a service account to access the data, providing the service account's credentials as part of the application setup. The application will then use the service account to access the consumer's data.
B. Create a share from the provider account to the consumer account, granting the consumer read access to the application package's data. Then, use a setup script to grant ownership of the data to the application role after installation.
C. Grant the 'USAGE privilege on the consumer's database and schema to the application's role within the setup script. This implicitly allows the application to read all data within that schema.
D. The consumer must manually grant the necessary privileges to the application's role after the application is installed, as the application package cannot automatically modify the consumer's security settings.
E. Define the required privileges in the application package manifest (snowflake.yml). Ensure that the setup script includes commands to grant the specific privileges on the consumer's data to the application's custom role, using 'GRANT ON TO ROLE within an EXECUTE IMMEDIATE statement in the setup script. The setup script should also define the application role.

Answer: E

Explanation:
Option B is correct because it outlines the necessary steps for secure data access in a Snowflake Native Application. The application package manifest informs Snowflake about the app's requirements. The setup script handles granting privileges using EXECUTE IMMEDIATE' because the application role doesn't exist in the consumer account until installation. Options A, C, D, and E are incorrect because they either describe insecure practices, inaccurate assumptions about application capabilities, or fail to address the secure granting of privileges to the application's role within the consumer's environment. Shares are not used to grant privileges to roles in the consumer account; privileges must be granted directly. Consumers are not typically required to manually grant privileges. Service accounts are not a supported method. 'USAGE' does not provide read access to the tables.

NEW QUESTION # 270
You're developing a Snowflake Native Application that requires frequent updates to its core logic. You need to implement a deployment strategy that minimizes downtime and allows for easy rollback in case of issues. Which combination of deployment techniques would BEST achieve this goal when deploying updates to your Snowflake Native App? (Choose two)

A. Use the ALTER APPLICATION' command with the 'FORCE option to immediately replace the existing application with the new version, ignoring any potential compatibility issues.
B. Implement canary deployments by gradually rolling out the new version to a small subset of consumers, monitoring performance, and then expanding the rollout if no issues are detected.
C. Deploy the updated application directly to the production environment during off-peak hours, relying on thorough testing in a pre-production environment to minimize risks.
D. Implement a blue/green deployment strategy, maintaining two identical environments. Deploy the update to the 'blue' environment, test, and then switch traffic from 'green' to 'blue'. If issues arise, switch back to 'green'.
E. Utilize zero-copy cloning to create a staging environment of your application, deploy the new version to the clone, and then swap the clone with the production environment for near-instant deployment.

Answer: B,E

Explanation:
The best options are A and E. Zero-copy cloning allows for rapid deployment and rollback, as the switch between environments is metadata-only. Canary deployments allow for testing in production with minimal impact on the majority of users. Option C, while a valid strategy in general, isn't directly applicable in Snowflake Native Apps where you are providing an application into a customer's account. Options B and D are risky, as they involve directly modifying the production environment without sufficient safeguards. Force option is risky and dangerous.

NEW QUESTION # 271
A provider is developing a Snowflake Native App and utilizes event sharing to communicate state changes to consumers. After initial installation, a consumer reports not receiving any event notifications. The provider has verified the event table is populated correctly. Which of the following are the MOST likely reasons for this issue and how can the provider troubleshoot them?

A. The consumer has not explicitly granted the necessary privileges on the event table function to the role used by the app. Instruct the consumer to grant USAGE on the event table function to the app role.
B. The consumer has not refreshed their application instance metadata. Ask the consumer to execute SYSTEM$REFRESH_EXTERNAL_FUNCTIONS() in the application database.
C. The consumer's event table function does not have the correct security invoker privileges. Grant EXECUTE TASK on the event table function to the consumer role.
D. Event sharing is inherently unreliable and Snowflake does not guarantee event delivery. The provider should implement alternative polling mechanisms.
E. The event table function is not correctly filtering events based on the consumer's application instance I Review the function logic to ensure proper filtering using APP_INSTANCE_ID().

Answer: A,E

Explanation:
B and D are the most likely reasons. B: The consumer needs to grant USAGE on the event table function to the application role. D: The event table function must correctly filter events using APP INSTANCE_ID() to ensure the consumer only receives events related to their instance. A is incorrect because the consumer (not provider) needs to grant usage. C is incorrect as SYSTEM$REFRESH EXTERNAL FUNCTIONS() is not the correct procedure in this context. E is wrong. Snowflake guarantees event delivery, assuming correct setup.

NEW QUESTION # 272
You are developing a Snowflake Native Application that processes financial transactions. You want to implement a robust version management strategy. You have created versions 'v1_0', 'V1 _ 1', and 'v2 Version has a critical bug fix and needs to be prioritized for immediate deployment to specific consumer accounts that reported issues, while contains significant feature enhancements and is undergoing phased rollout. What is the most efficient and secure way to manage these releases in Snowflake?

A. Option C
B. Option D
C. Option B
D. Option E
E. Option A

Answer: E

Explanation:
Option A is the most efficient. Granting 'I-JSAGES on specific versions directly controls which version each consumer account accesses. This avoids the overhead of deploying multiple application packages and doesn't require complex data manipulation within the application itself. Options B is inefficient and resource intensive. Option C will only effect the new installation, and we already has consumers that need the bug fixed on the old version. Option D is complex and requires custom code which can lead to errors. Option E is viable but the patch command is suited for more than just bug fixes, using the version grants are the best method for this case.

NEW QUESTION # 273
You are packaging a Snowflake Native App that includes a file. During the packaging process, you encounter an error stating that a required Python package, 'pandas', is not found. However, you have included a 'requirements.txt' file in the application bundle with 'pandas' listed as a dependency. What is the MOST likely cause of this error, and what steps can you take to resolve it?

A. The 'requirements.txt' file is not being correctly processed by the Snowflake Native App build system. Ensure the file is in the root directory of the application bundle and is properly formatted.
B. Snowflake does not automatically install packages from 'requirements.txt' during packaging. You must manually upload the pandas package to a Snowflake stage and import it within your 'streamlit.py' file.
C. Snowflake automatically installs all packages listed in 'requirements.txt' when the application is packaged, so the issue must lie elsewhere, such as a typo in the package name.
D. The 'requirements.txt' file needs to be converted to a 'setup.py' file for Snowflake to recognize the dependencies correctly.

Answer: A

Explanation:
The most likely cause is that the 'requirements.txt' file is either not in the correct location (root directory of the application bundle) or is improperly formatted. Snowflake expects the file to be in the root and follows standard Python dependency declaration syntax. While Snowflake provides mechanisms for dependency management, properly placing and formatting the 'requirements.txt' is fundamental. Options stating that Snowflake automatically handles everything or requires manual uploads are incorrect or incomplete. Option E is not the most likely scenario, since it would require more configurations and more things to go wrong (hence less likely).

NEW QUESTION # 274
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