L1, L2 Visa

Hi ,
     Below is my experience during my L1B visa interview. I was very confident during interview and it was going smooth. He was typing a lot before asking new qustions.
Though visa officer in the end , put stamp ‘not clearly approved’ on form.

Me : Good morning, How are you?
VO : Good morning , Can you pass documents and passport please.

VO : Which company you are working for?
Me : I have been working for ZZZ

VO : How many years that you have been working for this company?
Me : 4 years

VO : What is your designation?
Me : Senior Engineer

VO: What is your salary?
Me : ZZZ$ per anum

VO: How many employee YYYY has?
Me: ZZZ

VO: How many branches in US ?
Me: Total YYYY branches

VO: Where will you going in US?
Me: I will be going at cedar rapids, IOWA.

VO: What are there in Cedar Rapids?
Me: There are high end tools and FPGA lab setup over there to validate our product.

VO: Is it client location?
Me: No , it is our company’s location

VO: Are you working for client?
Me: No , I won’t be working for client

VO: What is your specialized knowledge?
Me: I am having specialized knowledge in Verification Intellectual Property development using high speed technology YYYY . In my 4 years of experience, I did work on several projects using this technology and currently I am developing tool which is VIP having these high speed technology ZZZ. This product will be used in semi-conductor industries to ensure functional correctness of very complex hardware design like high end graphics processor , Display controllers , memory controllers etc

VO: Who is Intellectual property? ( I didn’t understand this question and told him that its ZZZ’ IP)

VO: Are you building specific chip?
Me: No , we are building YYYY based VIP

VO: How will you check functional correctness?
Me: Before chips goes to foundry, It is in piece of code , there we are verifying.

VO: Are you from quality engineer ? ( After this he left his chair and went. Came after 5 min)
Me: No , I am not.

VO: What are the application of these product?
Me: As I said , this will be used in hardware peripheral which are connected to motherboard like graphics processor, memory controller , SSD

VO: Are you targeting for specific application?
Me: I said , Yes

VO: Which application?
Me: High end graphics processor

VO: Where will the graphics processor be used?
Me: I said , it is for high graphics gaming applications

VO: Is it specific to console?
Me: Yes.

He was asking so many questions, he took around 25 min interview.
I dont know what is going wrong over here. He was not convinced what i am specialized in.

He might be thinking that i am quality/testing engineer who checks product quality. But I am ASIC and FPGA verification engineer. VO might have taken 'verification' keyword as software testing. I personally think due to this misconception , he did not approve visa

He put stamps on I129S 'not clearly approved'.