Snowflake COF-C02 Exam Practice Test Instant Access

Question 1

In the Snowflake access control model, which entity owns an object by default?

AThe user who created the object

BThe SYSADMIN role

COwnership depends on the type of object

DThe role used to create the object

Answer : D

In Snowflake's access control model, the default owner of an object is the role that was used to create the object.This role has the OWNERSHIP privilege on the object and can grant access to other roles1

Question 2

Which semi-structured data function interprets an input string as a JSON document that produces a VARIANT value?

APARSE_JSON

BCHECK_JSON

CJSON_EXTRACT_PATH_TEXT

DPARSE_XML

Answer : A

The semi-structured data function that interprets an input string as a JSON document and produces a VARIANT value is PARSE_JSON.This function is used to parse a JSON formatted string and return it as a VARIANT data type, which can then be used for further processing within Snowflake3.

Question 3

What is a characteristic of materialized views in Snowflake?

AMaterialized views do not allow joins.

BClones of materialized views can be created directly by the user.

CMultiple tables can be joined in the underlying query of a materialized view.

DAggregate functions can be used as window functions in materialized views.

Answer : C

One of the characteristics of materialized views in Snowflake is that they allow multiple tables to be joined in the underlying query.This enables the pre-computation of complex queries involving joins, which can significantly improve the performance of subsequent queries that access the materialized view4.References:[COF-C02] SnowPro Core Certification Exam Study Guide

Question 4

Which copy INTO command outputs the data into one file?

ASINGLE=TRUE

BMAX_FILE_NUMBER=1

CFILE_NUMBER=1

DMULTIPLE=FAISE

Answer : B

TheCOPY INTOcommand in Snowflake can be configured to output data into a single file by setting theMAX_FILE_NUMBERoption to 1. This option limits the number of files generated by the command, ensuring that only one file is created regardless of the amount of data being exported.

References:

[COF-C02] SnowPro Core Certification Exam Study Guide

Snowflake Documentation on Data Unloading

Question 5

Which command will unload data from a table into an external stage?

APUT

BINSERT

CCOPY INTO <location>

DGET

Answer : C

In Snowflake, the COPY INTO <location> command is used to unload (export) data from a Snowflake table to an external stage, such as an S3 bucket, Azure Blob Storage, or Google Cloud Storage. This command allows users to specify the format, file size, and other options for the data being unloaded, making it a flexible solution for exporting data from Snowflake to external storage solutions for further use or analysis. References: Snowflake Documentation on Data Unloading

Question 6

What column type does a Kafka connector store formatted information in a single column?

AARRAY

BOBJECT

CVARCHAR

DVARIANT

Answer : D

The Kafka connector stores formatted information in a single column of type VARIANT.This column type is used to store semi-structured data like JSON or Avro, which allows for flexibility in the data structure

Question 7

How does Snowflake utilize clustering information to improve query performance?

AIt prunes unnecessary micro-partitions based on clustering metadata.

BIt compresses the data within micro-partitions for faster querying.

CIt automatically allocates additional resources to improve query execution.

DIt organizes clustering information to speed-up data retrieval from storage

Answer : A

Snowflake utilizes clustering information to enhance query performance by pruning unnecessary micro-partitions.

Clustering Metadata: Snowflake stores clustering information for each micro-partition, which includes data range and distribution.

Pruning Micro-partitions: When a query is executed, Snowflake uses this clustering metadata to identify and eliminate micro-partitions that do not match the query criteria, thereby reducing the amount of data scanned and improving query performance.

References:

Snowflake Documentation on Clustering

Snowflake Documentation on Micro-partition Pruning

Snowflake SnowPro Core Certification COF-C02 Exam Practice Test