A control is an action or measure that reduces the likelihood or impact of a risk to an acceptable level. Controls can be classified into different types based on their purpose or function, such asdetective, compensating, corrective, or preventive. Performing a background check on a new employee candidate before hiring is an example of a preventive control. A preventive control is a control that aims to prevent the occurrence or manifestation of a risk, such as by avoiding, removing, or reducing the risk sources, causes, or drivers. A background check is a process that verifies the identity, qualifications, and history of a potential employee, and helps to ensure that the employee is suitable and trustworthy for the job. A background check can prevent the risk of hiring an unqualified, fraudulent, or malicious employee, who could compromise the performance, security, or compliance of the enterprise. The other options are not examples of preventive controls, as they involve different types of controls:

A detective control is a control that aims to detect the occurrence or manifestation of a risk, such as by monitoring, measuring, or reporting the risk events, indicators, or outcomes. An example of a detective control is a log review, which is a process that analyzes the records of the activities or transactions on the IT systems or applications, and helps to identify any anomalies, errors, or violations that could indicate a risk.

A compensating control is a control that aims to compensate for the weakness or deficiency of another control, such as by providing an alternative or additional level of protection or assurance. An example of a compensating control is a firewall, which is a device or software that filters the network traffic and blocks the unauthorized or malicious access to the IT systems or applications, and helps to compensate for the lack or failure of other security controls, such as encryption, authentication, or authorization.

A corrective control is a control that aims to correct the occurrence or manifestation of a risk, such as by restoring, repairing, or improving the affected assets, processes, or functions. An example of a corrective control is a backup, which is a copy or replica of the data or informationon the IT systems or applications, and helps to correct the loss or damage of the data or information due to a risk, such as a hardware failure, a software error, or a cyberattack. References = Risk and Information Systems Control Study Manual, 7th Edition, Chapter 2, Section 2.3.3.1, pp. 62-63.