They are interviewing for a Qualified Job Offer. It’s different from a CJO in that Delta doesn’t make a final hiring decision until just before they are offered a mainline class (about 42 months or less after they start indoc at a DCI carrier or get mission qualified in the reserves). In the time leading up to that final decision, the Propel student’s entire flying career will be continuously under a microscope. In fact, they won’t even take the MMPI until just before the mainline indoc class invite. The same rules apply as any OTS candidate with regard to only two attempts to pass it. If they can’t they will be forever excluded from getting hired by Delta.

Propel isn’t a guarantee or a contract. Nothing compels Delta to hire the student nor does it require the student to deicide to spend their career at Delta. As for getting hired by a DCI carrier or getting selected by a reserve unit, all of that is done on their own. Being in the Propel program doesn’t magically open doors for them. They have to apply, interview, and get hired every step of the way.