2 votes 2 votes A) 3 B) 2 C) 1 D) 0 iita asked Feb 5, 2017 iita 1.0k views answer comment Share Follow See all 15 Comments See all 15 15 Comments reply Show 12 previous comments Devshree Dubey commented Feb 6, 2017 reply Follow Share Yes even I m wondering. In tat case d answer is a 0 value returned by d subquery. :) 0 votes 0 votes Arjun commented Feb 19, 2017 reply Follow Share Exists <0> returns TRUE. See its English meaning - it checks for existence- not what value exists. This is similar to null set and a set containing empty string in TOC. 2 votes 2 votes Dexter commented Feb 19, 2017 reply Follow Share So now non null value exist for each one of them . So it will return 3 :) 2 votes 2 votes Please log in or register to add a comment.