婚姻绿卡Request for Applicatnt to Appear for Initial Interview, 请问：

面试通知单有一个 很长的check list, 其中一项是：

A completed Affidavit of Support (Form I-864) with all required evidence, including the following (unless already submitted):
  - Federal Income Tax returns and W-2s
  - Letters from each currents employer, verifying current rate of pay and average weekly hours, and pay stubs for the past 2 months;

当初交申请表的时候已经交了Form I-864, tax return, W2. 当时表格没有要求employer letter, pay stubs 等等，现在面试需要预备这些材料吗？

一般这样的面试是夫妻分开面试吗？如果面试没有问题，是否等于绿卡批了？

谢谢！