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質問 # 173
What type of query benefits the MOST from search optimization?
- A. A query that uses equality predicates or predicates that use IN
- B. A query that filters on semi-structured data types
- C. A query that includes analytical expressions
- D. A query that uses only disjunction (i.e., OR) predicates
正解：A
解説：
Search optimization in Snowflake is designed to improve the performance of queries that are selective and involve point lookup operations using equality and IN predicates. It is particularly beneficial for queries that access columns with a high number of distinct values1.
References = [COF-C02] SnowPro Core Certification Exam Study Guide, Snowflake Documentation
質問 # 174
Which of the following objects can be shared through secure data sharing?
- A. Masking policy
- B. Stored procedure
- C. Task
- D. External table
正解：D
解説：
Secure Data Sharing enables sharing selected objects in a database in your account with other Snowflake accounts. The following Snowflake database objects can be shared:
Tables
External tables
Secure views
Secure materialized views
Secure UDFs
Snowflake enables the sharing of databases through shares, which are created by data providers and "imported" by data consumers.
https://docs.snowflake.com/en/user-guide/data-sharing-intro.html#:~:text=Secure%20Data%20Sharing%20enables%20sharing,External%20tables
質問 # 175
How should a Snowflake use' configure a virtual warehouse to be in Maximized mode''
- A. Set the STATEMENT_TIMEOUT_1M_SECOMES to 0.
- B. Set the same value for both MIN_CLUSTER_COUNT and MAX_CLUSTER_COUNT.
- C. Set the MAX_CONCURRENCY_LEVEL to a value of 12 or large.
- D. Set the WAREHOUSES_SIZE to 6XL.
正解：B
解説：
In Snowflake, configuring a virtual warehouse to be in a "Maximized" mode implies maximizing the resources allocated to the warehouse for its duration. This is done to ensure that the warehouse has a consistent amount of compute resources available, enhancing performance for workloads that require a high level of parallel processing or for handling high query volumes.
To configure a virtual warehouse in maximized mode, you should set the same value for both MIN_CLUSTER_COUNT and MAX_CLUSTER_COUNT. This configuration ensures that the warehouse operates with a fixed number of clusters, thereby providing a stable and maximized level of compute resources.
Reference to Snowflake documentation on warehouse sizing and scaling:
* Warehouse Sizing and Scaling
* Understanding Warehouses
質問 # 176
Which commands can only be executed using SnowSQL? (Select TWO).
- A. LIST
- B. REMOVE
- C. COPY INTO
- D. PUT
- E. GET
正解：A、D
解説：
The LIST and PUT commands are specific to SnowSQL and cannot be executed in the web interface or other SQL clients. LIST is used to display the contents of a stage, and PUT is used to upload files to a stage.
References: [COF-C02] SnowPro Core Certification Exam Study Guide
質問 # 177
What is the MINIMUM Snowflake edition required to use the periodic rekeying of micro-partitions?
- A. Business Critical
- B. Virtual Private Snowflake
- C. Standard
- D. Enterprise
正解：A
質問 # 178
What is the recommended file sizing for data loading using Snowpipe?
- A. A compressed file size greater than 1 GB, and up to 2 GB
- B. A compressed file size greater than 10 MB, and up to 100 MB
- C. A compressed file size greater than 100 MB, and up to 250 MB
- D. A compressed file size greater than 100 GB, and up to 250 GB
正解：C
解説：
https://www.phdata.io/blog/how-to-optimize-snowpipe-data-load/#:~:text=Snowpipe%20is%20typically%20used%20to,data%20within%20one%2Dminute%20intervals.
質問 # 179
What role is required to use Partner Connect?
- A. ACCOUNTADMIN
- B. ORGADMIN
- C. SECURITYADMIN
- D. SYSADMIN
正解：C
質問 # 180
What happens when a cloned table is replicated to a secondary database? (Select TWO)
- A. Additional costs for storage are charged to a secondary account
- B. A read-only copy of the cloned tables is stored.
- C. The replication will not be successful.
- D. Metadata pointers to cloned tables are replicated
- E. The physical data is replicated
正解：A、E
質問 # 181
What is the default character set used when loading CSV files into Snowflake?
- A. ISO S859-1
- B. ANSI_X3.A
- C. UTF-16
- D. UTF-8
正解：D
解説：
https://docs.snowflake.com/en/user-guide/intro-summary-loading.html#:~:text=For%20delimited%20files%20(CSV%2C%20TSV,encoding%20to%20use%20for%20loading.
For delimited files (CSV, TSV, etc.), the default character set is UTF-8. To use any other characters sets, you must explicitly specify the encoding to use for loading. For the list of supported character sets, see Supported Character Sets for Delimited Files (in this topic).
質問 # 182
True or False: When a user creates a role, they are initially assigned ownership of the role and they maintain ownership until it is transferred to another user.
- A. True
- B. False
正解：A
質問 # 183
What is the MAXIMUM number of clusters that can be provisioned with a multi-cluster virtual warehouse?
- A. 0
- B. 1
- C. 2
- D. 3
正解：C
解説：
In Snowflake, the maximum number of clusters that can be provisioned within a multi-cluster virtual warehouse is 10. This allows for significant scalability and performance management by enabling Snowflake to handle varying levels of query load by adjusting the number of active clusters within the warehouse.References: Snowflake documentation on virtual warehouses, particularly the scalability options available in multi-cluster configurations.
質問 # 184
Which of the following are handled by the cloud services layer of the Snowflake architecture? (Choose two.)
- A. Authentication and access control
- B. Query execution
- C. Data loading
- D. Security
- E. Time Travel data
正解：C、D
質問 # 185
What transformations are supported in a CREATE PIPE ... AS COPY ... FROM (....) statement? (Select TWO.)
- A. Columns can be reordered
- B. Data can be filtered by an optional where clause
- C. Row level access can be defined
- D. Incoming data can be joined with other tables
- E. Columns can be omitted
正解：B、E
解説：
In a CREATE PIPE ... AS COPY ... FROM (....) statement, the supported transformations include filtering data using an optional WHERE clause and omitting columns. The WHERE clause allows for the specification of conditions to filter the data that is being loaded, ensuring only relevant data is inserted into the table.
Omitting columns enables the exclusion of certain columns from the data load, which can be useful when the incoming data contains more columns than are needed for the target table.
References:
* [COF-C02] SnowPro Core Certification Exam Study Guide
* Simple Transformations During a Load1
質問 # 186
What is the minimum Snowflake edition that provides data sharing?
- A. Premier
- B. Enterprise
- C. Business Critical Edition
- D. Standard
正解：D
質問 # 187
Which interfaces can be used to create and/or manage Virtual Warehouses?
- A. SQL commands
- B. The Snowflake Web Interface (UI)
- C. Data integration tools
- D. All of the above
正解：D
質問 # 188
Which services does the Snowflake Cloud Services layer manage? (Select TWO).
- A. Compute resources
- B. Query execution
- C. Metadata
- D. Data storage
- E. Authentication
正解：C、E
解説：
Explanation
https://docs.snowflake.com/en/user-guide/intro-key-concepts.html
The cloud services layer is a collection of services that coordinate activities across Snowflake. These services tie together all of the different components of Snowflake in order to process user requests, from login to query dispatch. The cloud services layer also runs on compute instances provisioned by Snowflake from the cloud provider.
Services managed in this layer include:
* Authentication
* Infrastructure management
* Metadata management
* Query parsing and optimization
* Access control
質問 # 189
A user has 10 files in a stage containing new customer data.
The ingest operation completes with no errors, using the following command:
COPY INTO my__table FROM @my__stage;
The next day the user adds 10 files to the stage so that now the stage contains a mixture of new customer data and updates to the previous data. The user did not remove the 10 original files.
If the user runs the same copy into command what will happen?
- A. All data from only the newly-added files will be appended to the table.
- B. The operation will fail with the error uncertain files in stage.
- C. Only data about new customers from the new files will be appended to the table
- D. All data from all of the files on the stage will be appended to the table
正解：D
質問 # 190
What consideration should be made when loading data into Snowflake?
- A. The number of data files that are processed in parallel is determined by the virtual warehouse.
- B. Create large data files to maximize the processing overhead for each file.
- C. The number of load operations That run in parallel can exceed the number of data files to be loaded.
- D. Create small data files and stage them in cloud storage frequently.
正解：A
質問 # 191
What is a responsibility of Snowflake's virtual warehouses?
- A. Query execution
- B. Metadata management
- C. Infrastructure management
- D. Permanent storage of micro-partitions
- E. Query parsing and optimization
正解：A
解説：
Reference:
https://docs.snowflake.com/en/user-guide/warehouses.html#:~:text=A%20warehouse%20provides%20the%20re
質問 # 192
What tasks can be completed using the copy command? (Select TWO)
- A. Columns can be aggregated
- B. Data can be loaded without the need to spin up a virtual warehouse
- C. Columns can be reordered
- D. Columns can be joined with an existing table
- E. Columns can be omitted
正解：C、E
質問 # 193
How does the search optimization service help Snowflake users improve query performance?
- A. It scans the local disk cache to avoid scans on the tables used in the Query.
- B. It scans the micro-partitions based on the joins used in the queries and scans only join columns.
- C. It keeps track of running queries and their results and saves those extra scans on the table.
- D. II maintains a persistent data structure that keeps track of the values of the table's columns m each of its micro-partitions.
正解：D
質問 # 194
A virtual warehouse's auto-suspend and auto-resume settings apply to which of the following?
- A. The primary cluster in the virtual warehouse
- B. The database in which the virtual warehouse resides
- C. The entire virtual warehouse
- D. The Queries currently being run on the virtual warehouse
正解：C
解説：
https://docs.snowflake.com/en/user-guide/warehouses-overview.html#:~:text=Similarly%2C%20auto%2Dresume%20ensures%20that,individual%20clusters%20in%20the%20warehouse.
質問 # 195
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