I also experienced a similar string of questions from this number. He had an Indian/Pakistani accent and said he was working for a company called Gross and wanted to send me some research he had done. When I told him I wasn't interested in giving him any details, he quickly hung-up. I would suggest to all not to open any links sent from him.
He said he was from Dell and did a research, wanted to send me something and check up on next week, I said ok. (hasn't sent anything yet) but today my colleague got a call from same number- did not pick it up.
He said he was from IBM asked for me by name (he didnt realize I was the one who answered) and said "she is expecting my call" when I said who I was he hung up ...