No. It is illegal for employers to recoup PERM costs, including advertising and attorney fees, from employees. Such contracts are unenforceable.

Approval requires good-faith intent to stay. If an exceptional opportunity arises later without prior negotiation, taking it usually does not affect your green card. 

College students are domiciled both at school and their permanent family home, so they may file in either state. 

Standard PTO is not unemployment. For remote work abroad, consult your DSO. If you have no accumulated unemployment, short periods are generally low risk.

This is discouraged as it permanently terminates STEM OPT status. The government may question your intent. Consider alternative compensation or cap-exempt H-1B roles instead.

Section 245(k) allows up to 180 days out of status for EB-1, EB-2, and EB-3, but may not apply to other situations. Even one day out of status can cause ineligibility. Avoid withdrawing pending applications as it may raise red flags.

Prepare to explain the choice of adjustment of status over consular processing, focusing on convenience. Note that unauthorized work can lead to denial; if denied, a Notice of Intent to Deny (NOID) usually provides time for a response.

Cap-Gap acts as an extension of the current underlying status. If the F-1 STEM OPT status allowed for dual employment, that authorization continues under Cap-Gap until the H-1B takes effect.