Ase interview questions

Round 2(tech+hr)- He first asked about me,than came to find nearest number to a given number which is prime, then he asked about my project whether they were team based or solo,and difficulty i faced . Then they asked me which sports I like . Then about indexing and finally a query to count total no of products which have discount greater than 20%.I wrote “Select count(discount) from orders where discount >=20;” .I don’t know if it was wrong, but he said do we write “count(discount)”?.I got confused and changed to count(*) ,he asked me what “*” means ,i told him and at last he asked me any other thing I am working on,I told him I am working on WSN this semester.Finally he told me to ask something to him .of course i asked his experience and what I have to do in company and finally i asked which languages in used in He said jnodes, html,etc and told me c is now rarely used in comapanies.Interview was over in 19 mins