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| Section | Objectives |
|---|---|
| Topic 1: Data Loading and Unloading | - Data unloading and external stages - Bulk loading using stages and COPY INTO |
| Topic 2: Snowflake Architecture and Overview | - Virtual warehouses and resource scaling concepts - Snowflake architecture concepts (cloud data platform, separation of storage and compute) |
| Topic 3: Data Transformations and Querying | - SQL querying in Snowflake - Semi-structured data handling (VARIANT, JSON, Parquet) |
| Topic 4: Data Protection, Security, and Performance | - Role-based access control (RBAC) - Query performance optimization basics - Time Travel and Fail-safe concepts |
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NEW QUESTION # 280
Which cache type is used to cache data output from SQL queries?
Answer: B
Explanation:
The Result cache is used in Snowflake to cache the data output from SQL queries. This feature is designed to improve performance by storing the results of queries for a period of time. When the same or similar query is executed again, Snowflake can retrieve the result from this cache instead of re-computing the result, which saves time and computational resources.
References:
Snowflake Documentation on Query Results Cache
SnowPro® Core Certification Study Guide
NEW QUESTION # 281
To use the overwrite option on insert, which privilege must be granted to the role?
Answer: D
Explanation:
To use the overwrite option on insert in Snowflake, the DELETE privilege must be granted to the role. This is because overwriting data during an insert operation implicitly involves deleting the existing data before inserting the new data.
* Understanding the Overwrite Option: The overwrite option (INSERT OVERWRITE) allows you to replace existing data in a table with new data. This operation is particularly useful for batch-loading scenarios where the entire dataset needs to be refreshed.
* Why DELETE Privilege is Required: Since the overwrite operation involves removing existing rows in the table, the executing role must have the DELETE privilege to carry out both the deletion of old data and the insertion of new data.
* Granting DELETE Privilege:
* To grant the DELETE privilege to a role, an account administrator can execute the following SQL command:
sqlCopy code
GRANT DELETE ON TABLE my_table TO ROLE my_role;
Reference: For additional details on inserting data with the overwrite option and the required privileges, consult the Snowflake documentation on data loading:
https://docs.snowflake.com/en/sql-reference/sql/insert.html
NEW QUESTION # 282
Which Snowflake architectural layer is responsible for a query execution plan?
Answer: A
Explanation:
In Snowflake's architecture, the Cloud Services layer is responsible for generating the query execution plan.
This layer handles all the coordination, optimization, and management tasks, including query parsing, optimization, and compilation into an execution plan that can be processed by the Compute layer.
NEW QUESTION # 283
How many credits does a size 3X-Large virtual warehouse consume if it runs continuously for 2 hours?
Answer: A
Explanation:
In Snowflake, the consumption of credits by a virtual warehouse is determined by its size and the duration for which it runs. A size 3X-Large virtual warehouse consumes 128 credits if it runs continuously for 2 hours.
This consumption rate is based on the principle that larger warehouses, capable of providing greater computational resources and throughput, consume more credits per hour of operation. The specific rate of consumption is defined by Snowflake's pricing model and the scale of the virtual warehouse.References:
Snowflake Pricing Documentation
NEW QUESTION # 284
Which of the following statement is true of Snowflake?
Answer: A
NEW QUESTION # 285
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