H1B, H4 Visa

Interview Date: June 3rd 2019.
VISA Class: H1 B and H4 during the same appointment slot (11:30 am)
Job: Full time employment as an electrical engineer at a top US company. Have been working for the same company right after graduation.
Interviewer: Lady (AA). Aged between 28-35. Average friendly but she looked professional.

Interview scheduled: My past F1 VISA was stamped in 2011, I never returned INDIA after F1 expired. So I scheduled for a consular interview after 8 years. In the Meanwhile, my first H1B, H1B extension, and I140 were approved through the sample employer.

VO: Asked basic questions related to their stay in USA.
 For H1 applicant :
Q1) Were you on F1 VISA and then changed the status to H1B ? Replied yes
Q2)Asked a copy of original current I797? Provided.
Q3) Asked about Job responsibilities and nature of Job? Replied: all questions were answered appropriately and she determined that my profession matches with one of the listed technologies from TECHNOLOGY ALERT LIST(TAL).
q4) Do you know H1B rights? replied , yes.

For H4:
Q1) were you on F1 and then changed to H1, and later again changed to H4? Replied: Yes and explained.
Q2)Asked a copy of original I797? Provided.
Q3) what kind of a job you are doing right now and who is your current and past employers? Replied: working as a FT associate scientist in a reputed pharma company. Last company was another top pharma company, with the same kind of Job .
q4) Do you know your rights in USA? replied , yes.

VO: At the end she grabbed a paper from the side racks, and mentioned that she needs to have some administrative processing done to find out addition information?
I Replied: Is there a way I can give you more information that you might be looking for? or do you need any additional supporting documents?

VO: You are fine. We'll email you for the list of the required documents and she handed a white 221g with first box checked, returned passports. Interview was done.

I received an email right after the interview to fill a questionnaire, attach resume, employer letters. I completed the questionnaire, consulted with our immigration specialist, then made sure all questions were answered correctly. A copy of updated employment support was provided by our immigration specialist in addition to employment verification. I responded back to the 221G information request on june 4th 2019. Checked status on CAEC website, status was 'admin processing'.
Note: My immigration team recommended not to send any additional documents apart from what they asked for, else processing could get delayed.

on July 1st, I received an email to submit both passports, which I did the same day to VAC begumpet.
H4 case status changed to 'issued' from 'admin processing' on July 12th. Received email to collect passport on July 15th, collected passport on the same day and verified VISA stamp with no errors found.
H1B case status changed to 'application received' on july 12th from 'admin processing'. Again on July 17th case status changed to 'admin processing', on july 18th it status changed to 'Issued.

Waiting for passport collection email.................

Hope my experience helps someone who is in the same boat. I appreciate everyone who posted their experiences in this site as it greatly helps in estimating the next steps and average 221g processing time for FTE and contractors.