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Snowflake NAS-C01 Exam Syllabus Topics:

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

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Snowflake SnowPro Specialty - Native Apps Sample Questions (Q215-Q220):

NEW QUESTION # 215
A consumer reports that your Snowflake Native Application is consistently failing with an 'Insufficient privileges' error when attempting to execute a specific function. As the provider, you need to diagnose the issue. Which of the following steps should you perform FIRST, considering the principles of least privilege and secure data access in Snowflake Native Apps?

A. Temporarily disable all security policies (e.g., row access policies, masking policies) in the consumer's account to isolate the problem.
B. Grant the "APPLY MASKING POLICY privilege on the database to the application invoker role.
C. Grant the 'USAGE privilege on the entire application package to the consumer's account, ensuring they have access to all components.
D. Examine the function's definition and the objects it accesses to ensure that the necessary privileges are granted to the application's invoker's rights (IR) role or owner's rights (OR) role, and that a data access framework is in place when needed.
E. Request the consumer to grant 'OWNERSHIP of the target database to your application's service user.

Answer: D

Explanation:
The correct approach is to examine the function's permissions and the underlying objects (Option B). It is crucial to identify the specific privileges required by the function and grant them to the appropriate role (IR/OR). This approach adheres to the principle of least privilege. Granting broad privileges like in Options A, C, and E is a security risk. Disabling security policies (Option D) is a debugging tactic but should not be a long-term solution and could expose sensitive data.

NEW QUESTION # 216
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. 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.
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 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.

Answer: A

Explanation:
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).

NEW QUESTION # 217
You are developing a Snowflake Native Application that processes sensitive financial data. You need to implement robust logging and auditing to comply with regulatory requirements. Which of the following strategies would provide the MOST secure and comprehensive auditing and logging solution within the context of a Snowflake Native App?

A. Use Snowflake's stages to write the event logs and then create the external table on top of it to process the data.
B. Utilize Snowflake's Event Tables to capture application events. Ensure proper role-based access control is in place to restrict access to the event data within the provider account. Masking and Row Access policies should be applied before writing to event tables.
C. Implement logging to an external service such as AWS CloudWatch or Azure Monitor, streaming data directly from UDFs using external functions. Implement data redaction within the UDFs before sending data externally.
D. Rely solely on Snowflake's ACCOUNT_USAGE views and information schema tables within the consumer account.
E. Implement custom logging using UDFs that write directly to a table accessible only within the provider account. Use masking policies to protect sensitive data before logging.

Answer: B

Explanation:
Snowflake Event Tables provide a native, secure, and auditable way to track application events within the provider account. They are designed for observability and telemetry within the secure context of Snowflake. While options B and D are possible, they introduce complexities and potential security vulnerabilities related to managing access to external systems and ensuring data protection during transit. Option A provides insufficient application-specific logging. Option E, uses stages but not the snowflake event tables, stages are not the most suitable for application- specific data.

NEW QUESTION # 218
When designing the architecture of a Snowflake Native App, which of the following architectural considerations and trade-offs should you carefully evaluate to optimize performance, security, and cost-effectiveness? (Select all that apply)

A. Using secured API integration to call the external APIs to get real time details in the app to make the app more useful.
B. Implementing robust error handling and logging mechanisms to facilitate debugging and monitoring of the application's behavior in both the provider and consumer environments.
C. Choosing the appropriate data access model (e.g., UDFs, stored procedures, Snowpark) based on the specific use case and performance requirements, considering the overhead associated with each approach.
D. Storing all application data within the provider account and accessing it directly from the consumer account using data sharing to avoid data duplication.
E. Minimizing data transfer between the provider and consumer accounts by leveraging Snowpark and UDFs for data processing within the consumer's environment.

Answer: B,C,E

Explanation:
Options A, D, and E are crucial for optimal Snowflake Native App design. Minimizing data transfer (A) reduces costs and improves performance. Robust error handling and logging (D) are essential for debugging and monitoring. Choosing the correct data access model (E) is a key performance factor. Option B is incorrect because storing all data in the provider account and sharing to the consumer introduces unnecessary dependencies and potential security risks. Consumers also need to pay for querying your shared data. Option C is not always desirable, since calling external API every time would be too expensive.

NEW QUESTION # 219
You are developing a Snowflake Native Application with a custom setup script. Within the setup script, you need to perform different actions based on whether the application is being installed for the first time in a consumer's account, or if it's an upgrade from a previous version. Which of the following functions or techniques can you reliably use within the setup script to determine if the current execution is a fresh installation vs. an upgrade? (Assume the app version is maintained and accessible as a variable 'current_version' .)

A. Check if the current version is '1.0', assuming the initial version of the application will always be '1.0'.
B. Use the table 'APPLICATION_REGISTRY' function to check for an existing entry for the application in the current account.
C. Query the 'INFORMATION_SCHEMAPPLICATIONS' view to check if the application name already exists in the consumer's account.
D. Use 'SYSTEM$GET_PREVIOUS_VERSION()' function inside the setup script. If it returns NULL, it is the first install.
E. Attempt to read a known persistent setting from the application's metadata. If the setting exists, it's an upgrade; otherwise, it's a fresh install. (Requires metadata setup in a previous version)

Answer: D

Explanation:
Option C is the most reliable approach. The 'SYSTEM$GET_PREVIOUS_VERSION()' function is designed to return the version number of the previously installed version, or NULL if the application is being installed for the first time. Therefore, a NULL return value indicates a fresh install. Option A is not reliable. Option B is not a valid function. Option D is unreliable. Option E relies on the application's metadata management, which can be complex. The provided system function is the recommended approach.

NEW QUESTION # 220
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