How long does it take to receive an employment authorization for Iranian students who get a full time job offer in the US?

Two months would be fast no matter what country you are from.

Can a LPR file for AOS for his minor child with b2 visa based on F2a category

Repeat question.

He can only adjust status if he is in legal status when his priority date becomes current. There is a backlog on the F-2A category of a few months,...

How long do I need to stay in the US to preserver my green card?

At this point, you should consult directly with an immigration attorney.

Can a potential US employer deny a job offer if my US right to work is under deferred action (DACA)?

A private employer cannot discriminate against you on the basis of your authorization to work unless the perform Government contracts requiring...

Can I leave the country for a few years without losing my green card?

You would have to obtain a reentry permit in order to maintain your green card status.

H1b

Consult with an immigration attorney if your company does not have one working on your case.

Reentry permit s do not preserve continuous residence for naturalization purposes. Additionally short trips back and forth after the reentry...

You have not accrued unlawful presence if you merely remained in the US while a bona fide application for change of status was pending with the...

If i made extension for 6 month and its approved i stayed 1 year and 1 day more this mean i overstay while i was 17 years old

While "unlawful presence" does not accrue while person is under the age of 18, any overstay could result in refusal of a future visa application...