[Q138-Q158] Full COF-C02 Practice Test and 630 Unique Questions, Get it Now!

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Full COF-C02 Practice Test and 630 Unique Questions, Get it Now!

The Best COF-C02 Exam Study Material Premium Files and Preparation Tool

Snowflake COF-C02 (SnowPro Core Certification) Certification Exam is a valuable certification for professionals who work with Snowflake. It is designed to validate one’s expertise in using Snowflake and is recognized by organizations worldwide. SnowPro Core Certification Exam certification exam covers a wide range of topics, from Snowflake architecture and data warehousing to data loading and unloading. It is an excellent way to demonstrate one’s proficiency in using Snowflake and to enhance one’s career prospects.

Snowflake COF-C02 certification exam is a rigorous exam that tests the candidate’s knowledge and skills in Snowflake’s cloud data platform. COF-C02 exam includes a combination of multiple-choice and hands-on exercises that assess the candidate’s ability to perform tasks such as creating databases, loading data, and optimizing queries. SnowPro Core Certification Exam certification program is designed to evaluate the candidate’s understanding of Snowflake’s best practices and guidelines for data warehousing in the cloud. SnowPro Core Certification Exam certification provides a comprehensive understanding of Snowflake’s features and functionalities, making the candidate an expert in cloud data warehousing.

Q138. What are the least privileges needed to view and modify resource monitors? (Select TWO).

SELECT

OWNERSHIP

MONITOR

MODIFY

USAGE

To view and modify resource monitors, the least privileges needed are MONITOR and MODIFY. These privileges allow a user to monitor credit usage and make changes to resource monitors3.

Q139. Which of the following DML commands isn’t supported by Snowflake?

UPSERT

MERGE

UPDATE

TRUNCATE TABLE

Q140. From what stage can a Snowflake user omit the FROM clause while loading data into a table?

The user stage

The table stage

The internal named stage

The external named stage

Q141. A user unloaded a Snowflake table called mytable to an internal stage called mystage.
Which command can be used to view the list of files that has been uploaded to the staged?

list @mytable;

list @%raytable;

list @ %m.ystage;

list @mystage;

Q142. Which privilege must be granted to a share to allow secure views the ability to reference data in multiple databases?

CREATE_SHARE on the account

SHARE on databases and schemas

SELECT on tables used by the secure view

REFERENCE_USAGE on databases

To allow secure views the ability to reference data in multiple databases, the REFERENCE_USAGE privilege must be granted on each database that contains objects referenced by the secure view2. This privilege is necessary before granting the SELECT privilege on a secure view to a share.

Q143. True or False: Loading data into Snowflake requires that source data files be no larger than 16MB.

True

False

By default, COPY INTO location statements separate table data into a set of output files to take advantage of parallel operations. The maximum size for each file is set using the MAX_FILE_SIZE copy option. The default value is 16777216 (16 MB) but can be increased to accommodate larger files. The maximum file size supported is 5 GB for Amazon S3, Google Cloud Storage, or Microsoft Azure stages. To unload data to a single output file (at the potential cost of decreased performance), specify the SINGLE = true copy option in your statement. You can optionally specify a name for the file in the path.

Q144. A user wants to add additional privileges to the system-defined roles for their virtual warehouse. How does Snowflake recommend they accomplish this?

Grant the additional privileges to a custom role.

Grant the additional privileges to the ACCOUNTADMIN role.

Grant the additional privileges to the SYSADMIN role.

Grant the additional privileges to the ORGADMIN role.

Q145. What is the minimum Snowflake edition that customers planning on storing protected information in Snowflake should consider for regulatory compliance?

Standard

Premier

Enterprise

Business Critical Edition

Q146. A user has unloaded data from Snowflake to a stage
Which SQL command should be used to validate which data was loaded into the stage?

list @file__stage

show @file__stage

view @file__stage

verify @file__stage

Q147. A data provider wants to share data with a consumer who does not have a Snowflake account. The provider creates a reader account for the consumer following these steps:
1. Created a user called “CONSUMER”
2. Created a database to hold the share and an extra-small warehouse to query the data
3. Granted the role PUBLIC the following privileges: Usage on the warehouse, database, and schema, and SELECT on all the objects in the share Based on this configuration what is true of the reader account?

The reader account will automatically use the Standard edition of Snowflake.

The reader account compute will be billed to the provider account.

The reader account can clone data the provider has shared, but cannot re-share it.

The reader account can create a copy of the shared data using CREATE TABLE AS…

The reader account compute will be billed to the provider account. Very Comprehensive Explanation: In Snowflake, when a provider creates a reader account for a consumer who does not have a Snowflake account, the compute resources used by the reader account are billed to the provider’s account. This allows the consumer to query the shared data without incurring any costs. References: [COF-C02] SnowPro Core Certification Exam Study Guide

Q148. Which of the following SQL statements will list the version of the drivers currently being used?

Execute SELECT CURRENT_ODBC_CLlENT(); from the Web Ul

Execute SELECT CURRENT_JDBC_VERSION() ; from SnowSQL

Execute SELECT CURRENT_CLIENT(); from an application

Execute SELECT CURRENT_VERSION (); from the Python Connector

The correct SQL statement to list the version of the JDBC (Java Database Connectivity) drivers currently being used is to execute SELECT CURRENT_JDBC_VERSION(); from within SnowSQL or any client application that utilizes JDBC for connecting to Snowflake. Snowflake provides specific functions to query the version of the client drivers or connectors being used, such as JDBC, ODBC, and others. The CURRENT_JDBC_VERSION() function is designed specifically to return the version of the JDBC driver in use.
It’s important to note that Snowflake supports various types of drivers and connectors for connecting to different client applications, including ODBC, JDBC, Python, and others. Each of these connectors has its own method or function for querying the current version in use. For JDBC, the appropriate function is CURRENT_JDBC_VERSION(), reflecting the specificity required to obtain version information relevant to the JDBC driver specifically.
References:
* Snowflake Documentation on Client Functions: This information can typically be found in the Snowflake documentation under the section that covers SQL functions, particularly those functions that provide information about the client or session.

Q149. What are common issues found by using the Query Profile? (Choose two.)

Identifying queries that will likely run very slowly before executing them

Locating queries that consume a high amount of credits

Identifying logical issues with the queries

Identifying inefficient micro-partition pruning

Data spilling to a local or remote disk

The Query Profile in Snowflake is used to identify performance issues with queries. Common issues that can be found using the Query Profile include identifying inefficient micro-partition pruning (D) and data spilling to a local or remote disk (E). Micro-partition pruning is related to the efficiency of query execution, and data spilling occurs when the memory is insufficient, causing the query to write data to disk, which can slow down the query performance1.

Q150. What is the recommended file sizing for data loading using Snowpipe?

A compressed file size greater than 100 MB, and up to 250 MB

A compressed file size greater than 100 GB, and up to 250 GB

A compressed file size greater than 10 MB, and up to 100 MB

A compressed file size greater than 1 GB, and up to 2 GB

https://www.phdata.io/blog/how-to-optimize-snowpipe-data-load/#:~:text=Snowpipe%20is%20typically%20used%20to,data%20within%20one%2Dminute%20intervals.

Q151. Which statement describes pruning?

The filtering or disregarding of micro-partitions that are not needed to return a query.

The return of micro-partitions values that overlap with each other to reduce a query’s runtime.

A service that is handled by the Snowflake Cloud Services layer to optimize caching.

The ability to allow the result of a query to be accessed as if it were a table.

Pruning in Snowflake refers to the process of filtering or disregarding micro-partitions that are not needed to satisfy the conditions of a query. This optimization technique helps reduce the amount of data scanned, thereby improving query performance

Q152. What versions of Snowflake should be used to manage compliance with Personal Identifiable Information (PII) requirements? (Choose two.)

Custom Edition

Virtual Private Snowflake

Business Critical Edition

Standard Edition

Enterprise Edition

Q153. Which formats are supported for unloading data from Snowflake? Choose 2 answers

Delimited (CSV, TSV, etc.)

Avro

JSON

ORC

Q154. What actions will prevent leveraging of the ResultSet cache? (Choose two.)

Removing a column from the query SELECT list

Stopping the virtual warehouse that the query is running against

Clustering of the data used by the query

Executing the RESULTS_SCAN() table function

Changing a column that is not in the cached query

Q155. True or False: Once created, a micro-partition will never be changed.

True

False

Q156. A company strongly encourages all Snowflake users to self-enroll in Snowflake’s default Multi-Factor Authentication (MFA) service to provide increased login security for users connecting to Snowflake.
Which application will the Snowflake users need to install on their devices in order to connect with MFA?

Okta Verify

Duo Mobile

Microsoft Authenticator

Google Authenticator

Snowflake’s default Multi-Factor Authentication (MFA) service is powered by Duo Security. Users are required to install the Duo Mobile application on their devices to use MFA for increased login security when connecting to Snowflake. This service is managed entirely by Snowflake, and users do not need to sign up separately with Duo1.

Q157. Which data types does Snowflake support when querying semi-structured data? (Select TWO)

VARIANT

ARRAY

VARCHAR

XML

BLOB

https://docs.snowflake.com/en/user-guide/semistructured-intro.html#label-loading-semi-structured-data A VARIANT stores semi-structured data in Snowflake. It can store a value of any other type, including OBJECT and ARRAY.
The maximum length of a VARIANT is 16 MB.
A Snowflake ARRAY is similar to an array in many other programming languages. An ARRAY contains 0 or more pieces of data. Each element is accessed by specifying its position in the array.

Q158. What feature can be used to reorganize a very large table on one or more columns?

Micro-partitions

Clustering keys

Key partitions

Clustered partitions

Clustering keys in Snowflake are used to reorganize large tables based on one or more columns. This feature optimizes the arrangement of data within micro-partitions to improve query performance, especially for large tables where efficient data retrieval is crucial. References: [COF-C02] SnowPro Core Certification Exam Study Guide
https://docs.snowflake.com/en/user-guide/tables-clustering-keys.html

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