Snowflake Updated COF-C02 Exam Questions and Answers by santiago

The CURRENT_TASK_GRAPHS table function is designed to provide information on Directed Acyclic Graphs (DAGs) that are currently scheduled or executing within Snowflake. This function offers insights into the structure and status of task chains, enabling users to monitor and troubleshoot task executions. DAGs in Snowflake represent sequences of tasks with dependencies, and understanding their current state is crucial for managing complex workflows.References: Snowflake Documentation on Task Management

The primary factor that determines the cost of using a virtual warehouse in Snowflake is D. The length of time the compute resources in each cluster run. Snowflake's pricing model for compute usage is based on the concept of Snowflake credits, which are consumed based on the time virtual warehouses are running and the size of the warehouses. The more compute resources are utilized and the longer they run, the more credits are consumed, which directly impacts the cost.

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Snowflake Documentation on Virtual Warehouses: Understanding and Managing Warehouse Credit Usage

In Snowflake, a user within a reader account primarily has read-only access to the shared data. Reader accounts are created to enable third parties or separate business units to access and query data shared with them without allowing them to modify the underlying data. This means a user with a reader account can perform operations like querying shared data to analyze or report on it but cannot load new data, update existing data, or create new shares. This setup is crucial for maintaining data governance and security while enabling data sharing and collaboration.References: Snowflake Documentation on Reader Accounts

Masking policies in Snowflake are designed to protect sensitive information by dynamically hiding or obfuscating data based on the role of the user executing the query. This helps enforce data privacy and security by allowing only authorized users to see sensitive information. Masking policies do not encrypt data but apply rules to limit data visibility, ensuring sensitive data is protected during query execution without altering the underlying data.