Attempting an injection attack on a web server based on responses to True/False questions is called which of the following?

In a Blind SQLi attack, the attacker cannot see query results in the HTTP response and instead crafts Boolean-based or time-based payloads to ask yes/no questions about the database, reconstructing data one bit at a time based on how the application behaves differently for true versus false conditions.

DBMS-specific SQLi exploits syntax or features unique to a particular database engine such as MySQL or MSSQL, not a true/false inference technique.

Classic SQLi returns data directly in the application's response, meaning the attacker can read results without relying on behavioral differences.

Compound SQLi is not a recognized standard SQL injection category and does not describe the true/false inference methodology.