Usually Dhotis will hold your H1b as long as you pay them taxes every month. They'll run your payroll.

If Employer A terminates your H1b, you can still transfer to Employer B as long as it's within few days.. There's no specific guideline on how many days you've to do that. It dpends on different case and scenario.

Getting CPT immidiately is not easy.

Thank you for the information.
mero consultancy  Dhotis ko hoina, it's of khaire. But paiso ko kura ayo paci mahadev ko pani teen netra bhane jhai ho.
Actually, aile pani university ko course lee rako chu and  last I-20 they issued had the CPT date till end of next year.
So I think if i can regain that CPT if something goes wrong.