L1 and I-94 getting expired

[rehan.surve]

Hi ,

My L1B and I-94 is getting expired on June 29 2013, my wife got interview date of May 30th for L2. Will she

1. be having trouble in interview/port of entry
2. Does interviewer asks questions on duration left on primary applicant(L1 holder)
3. Is there any specific time frame for dependents to go for interview/enter US before primary applicants visa gets expired.
4. Has anyone else faced this situation

Any help will be greatly appreciated.

Thanks in advance.