Answer: UTF-8

The question asks for the only supported character set for loading and unloading data from all supported file formats. According to Snowflake documentation and the community discussion, UTF-8 is the default character set for delimited files (CSV, TSV) and the only supported character set for all other file formats (JSON, Avro, etc.) as well as for unloading data. The community comments with upvotes confirm this, referencing official Snowflake documentation that specifies UTF-8 as the exclusive character set for these operations. Options B (UTF-16), C (ISO-8859-1), and D (WINDOWS-1253) are not universally supported across all file formats in Snowflake, making them incorrect.

Author: LeetQuiz Editorial Team