Which of the following is a national security database?

The e-QIP (Electronic Questionnaires for Investigations Processing) is a national security database specifically designed to support background investigations for security clearance purposes. It is utilized primarily by government agencies to gather and manage information related to the security vetting process of individuals seeking access to classified information or sensitive positions.

e-QIP streamlines the application process by allowing individuals to submit their background information electronically, making it an essential tool for personnel security and ensuring that the vetting process adheres to national security standards. This database facilitates the collection of data from applicants, which is then used by agencies to determine an individual's suitability for positions of trust.

In contrast, the other options listed do not function as national security databases. The Department of Labor Database focuses on employment statistics and labor market information, the Federal Compliance Database relates to compliance with federal regulations, and Employee Performance Records are specific to organizational performance and conduct rather than national security screening processes.