Answer: Key pair authentication

The Snowflake Kafka connector uses key pair authentication as its primary authentication method. This is clearly documented in the official Snowflake documentation for the Kafka connector installation, which specifies that the connector requires a private key file for authentication. The community discussion shows 100% consensus on answer A with upvoted comments referencing the official documentation. Other options are incorrect: B (MFA) is for user login to Snowflake UI, C (OAuth) is for third-party application authentication, and D (username/password) is an alternative user authentication method but not used by the Kafka connector.

Author: LeetQuiz Editorial Team