Interviews are not "optional", meaning it is not YOUR option whether you have one or not. USCIS does not interview all applicants for the Adjustment of Status, some receive a green card in the mail with no interview. You will either get the green card in the mail OR you will get an interview letter in the mail. No one knows which.
There are no interviews for the AP (travel document) or the EAD (work authorization) and if you apply for both at the same time you will receive a "combo card". The combo card is no longer needed after you get your green card.
There is no such thing as a "temporary green card" there is a "conditional" 2 year, and unconditional, 10 year, green card. All benefits and privileges are identical but the conditional card requires a renewal and review of your case after 2 years. Once the conditions are lifted and you receive the 10 year card, you will be given "credit" for being a resident from the date your first card is issued.
Your 10 year card then becomes a "1 year card" for most people as they file for citizenship 1 year after that.
dave&jane reacted to Gary and Alla in How long does it take to get a temporary Green Card