Stuart is a penetration tester working with Regional Server Technologies. He was asked by the company to identify the vulnerabilities in its SQL database. Stuart wanted to perform a SQL penetration…

Stuart is a penetration tester working with Regional Server Technologies. He was asked by the company to identify the vulnerabilities in its SQL database. Stuart wanted to perform a SQL penetration by passing some SQL commands through a web application for execution and succeeded with a command that resulted in an error message. Which of the following strings is a wildcard attribute indicator?