What documents do I need to provide during my N-400 interview?

Supply them with whatever they are asking for, even if you have already submitted it.

Myself, Wife and child have a schengen visa. Will traveling to europe increase wife and child's odds of getting a b1/b2. I hv b1

It seems like your family will easily get the B visa.

If my US citizen brother files a petition for me and If I apply for a b1//b2 or E2 after that will my b1/b2 be refused.

Are you the same person who keeps posting about the B1/BE and E-2 issue? If you have this many questions that are specific to your case, contact...

It will also depend on your consulate.

(FOIA) request with the Executive Office for Immigration Review (EOIR)

Your A Number should be on your Notice to Appear (NTA).

Can a H1B holder transfer to L1A please advice if it is possible.

If you have been working for AAA for at least one year in a managerial position or a position that requires specialized knowledge.

Re entry visa

Do you want to take your wife as a green card holder?

You don't need to inform your employer about your GC basis.

How long does it take to receive, the notice of Action, I-797 after filing I-751?

You should get the receipt notice in about 1 to 3 weeks.

If I apply for an F1 or E1 or E2 at a US consulate or for adjustment and my F1 or E1 or E2 is denied will my b1/b2 be cancelled.

Normally the first thing an a officer does at a visa interview is cancel all visas currently in the person's passport.