To unload data from a relational table to JSON format, you can use the TO_CHAR function. This function converts a number to a character string, which can then be serialized into JSON format. While there isn't a direct function specifically named for unloading to JSON, converting the necessary fields to a string representation is a common step in preparing data for JSON serialization.
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Snowflake Documentation: TO_CHAR Function

The correct answers are B. In a CREATE STAGE statement and E. In a COPY INTO < location > statement .
When unloading data from Snowflake, file format options can be specified directly in the COPY INTO < location > command or associated with a named stage. Defining the file format in a stage is useful when repeated loads or unloads use the same format settings.
Why B is correct:
A stage can include a file format definition or reference. When data is unloaded to that stage, the file format associated with the stage can be used.
Example:
CREATE STAGE my_stage
FILE_FORMAT = (TYPE = CSV FIELD_DELIMITER = ' , ' );
COPY INTO @my_stage
FROM my_table;
Why E is correct:
The COPY INTO < location > command can specify file format options directly.
Example:
COPY INTO @my_stage/output/
FROM my_table
FILE_FORMAT = (TYPE = CSV COMPRESSION = GZIP);
Why the other options are incorrect:
A). A SELECT statement defines the query result to unload, but file format options are not specified as part of a normal SELECT.
C). A database definition does not define unload file format options.
D). An integration defines access to external services or storage, not the file format used for unloading.
Official Snowflake documentation reference:
Snowflake documentation explains that file format options can be specified in the COPY INTO < location > command or as part of a named stage definition.
Reference: Snowflake Documentation - COPY INTO < location > ; Snowflake Documentation - CREATE STAGE; Snowflake Documentation - File formats; SnowPro Core Study Guide - Data Loading and Unloading.

The correct answer is A. A staged file needs to be unloaded to a local machine .
The Snowflake GET command is used to download files from an internal Snowflake stage to a local file system. It is commonly used after data has been unloaded from a table into an internal stage and the user wants to retrieve those staged files locally.
Why A is correct:
The GET command downloads files from a Snowflake internal stage to a local directory.
Example:
GET @my_stage file:///tmp/data/;
This command downloads files from the internal stage @my_stage to the local /tmp/data/ directory.
Why the other options are incorrect:
B). Loading a local file onto a stage is done with the PUT command, not GET.
C). Opening query results in a third-party tool is not the purpose of the GET command.
D). Permanently deleting files from a Snowflake stage is done with the REMOVE command, not GET.
Official Snowflake documentation reference:
Snowflake documentation describes the GET command as the command used to download data files from a Snowflake stage to a local directory or folder.
Reference: Snowflake Documentation - GET command; Snowflake Documentation - PUT command; Snowflake Documentation - REMOVE command; SnowPro Core Study Guide - Data Loading and Unloading.