Which of the following jobs are restricted to preference eligibles?

The correct answer refers to positions that are considered to be within certain job categories that are specifically assigned to preference eligibles. In this context, preference eligibles are individuals who are afforded specific hiring preferences under federal employment policies due to their veteran status, disability, or other qualifying criteria.

Custodian and Elevator Operator positions fall under categories that traditionally have provisions in place for preference eligibles, ensuring that veterans and others who qualify can have priority in hiring for these roles. Such jobs are often filled through competitive processes that honor these preferences. These positions may not have the same level of competition as others, but ensuring that preference eligibles are considered first aligns with federal hiring practices and the protections established for these individuals.

In contrast, cab drivers, all jobs in the competitive service, and jobs that do not require a security clearance do not specifically restrict hiring to preference eligibles in the same way. Cab drivers, for example, may be part of a broader employment sector that doesn't have specific hiring mandates for preference eligibles. Similarly, the term "competitive service" involves a wide range of positions that may or may not include such restrictions based on the nature of the jobs and the hiring authorities involved. Jobs that do not require a security clearance can be filled by various candidates