I get this and they don't say anything when I answer. I have taken some online surveys and have received calls also from people who tell me I had expressed interesting in continuing education. I have told them I have not and they continue to call.
This call was received at about 8:35am, stating that I had took a survey online and expressed interest in finding a job, I have been employed by the same company for 9 months with no thoughts of changing employment. I told them no I don't remember a survey, he repeated that I had took a survey and if I remembered that. I told him he sounded like a recording, and he responded with "No, do I sound that good?" I said you sound like a recording, and he said "No" then repeated "You took a survey online and expressed an interest in job opportunities, do you remember that" after hearing the same thing a third time, I just hung up. I wasn't getting anywhere with this robot.
I have been receiving sales calls on my mobile. Although this is my personal area code, I had suspicions and looked up the number as I always do and found that it was a bogus call